CN104686430A - Prawn low dissolved oxygen resistance family selection method - Google Patents

Prawn low dissolved oxygen resistance family selection method Download PDF

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CN104686430A
CN104686430A CN201510158892.2A CN201510158892A CN104686430A CN 104686430 A CN104686430 A CN 104686430A CN 201510158892 A CN201510158892 A CN 201510158892A CN 104686430 A CN104686430 A CN 104686430A
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family
prawn
dissolved oxygen
shrimp
low dissolved
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CN104686430B (en
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刘定
刘建勇
刘荡
刘东晖
郑大
陈海龙
许榕榕
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Guangdong Haiwei Agricultural Group Co.,Ltd.
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Leizhou City Hai Wei Aquaculture Co Ltd
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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01KANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K61/00Culture of aquatic animals
    • A01K61/50Culture of aquatic animals of shellfish
    • A01K61/59Culture of aquatic animals of shellfish of crustaceans, e.g. lobsters or shrimps
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
    • Y02A40/81Aquaculture, e.g. of fish

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  • Environmental Sciences (AREA)
  • Marine Sciences & Fisheries (AREA)
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Abstract

The invention relates to a prawn low dissolved oxygen resistance family selection method, and belongs to the technical field of prawn stress-resistance trait selection. The method comprises the steps of base population establishing; F1 generation family establishing; same pool culturing; low dissolved oxygen resistance testing; F2 generation family establishing; continuous generation selecting, wherein different sources of parent prawns are selected to establish a full/half-slib family through directional mating, common environmental breeding is performed, 94 h low dissolved oxygen stress is performed, parent selecting and remaining are performed according to the low dissolved oxygen resistance test result and the growth measure result, after four generations of continuous selection, the family of distant genetic relationship is selected from the families with excellent growth performance and strong low dissolved oxygen resistance performance, the male and female prawns which are big in individual, strong in vigor and normal in gonad development are selected to serve as parent to breed as good varieties. According to the method, the problem occurring in prawn high-density culturing that the prawns are dead caused by the fact that the prawn growth is influenced by low dissolved oxygen is solved, and the development of the prawn high-density culture industry is greatly promoted.

Description

The resistance to low dissolved oxygen family selective breeding method of a kind of prawn
Technical field
The present invention relates to a kind of prawn selection, be specifically related to the resistance to low dissolved oxygen family selective breeding method of a kind of prawn, belong to prawn degeneration-resistant proterties breeding technique field.
Background technology
Prawn belongs to Arthropoda, Branchiata, Crustachia, Malacostraca, Decapoda, swimming suborder, Penaeidae, Penaeus.Prawn can divide sedentariae (as japonicus, furrowed prawn, European prawn etc.) and migration type (as Chinese prawn, banana prawn, penaeus penicillatus), and last class is dwelt in littoral shallow sea, often slips into daytime at husky the end, does not do large-scale movement; A rear class is dwelt in the muddy marine site of bank, river mouth, and normal work is moved and migration on a large scale.Prawn is mainly food with benthonic invertebrates, as Polychaeta, small-sized shell-fish and bivalve etc., sometimes also catches zooplankton.
Prawn has high nutritive value, is the delicious food be loved by the people.Shrimp has tonifying kidney and strengthening yang, logical breast is antitoxin, the controlling nocturnal emission with astringent drugs that nourishes blood, dissolving blood stasis and detoxication, beneficial gas grow sun, remove obstruction in channels to relieve pain, effect such as to reduce phlegm of whetting the appetite, and is suitable for the patients such as impotence due to deficiency of the kidney, seminal emission premature ejaculation, alactation, arthralgia and myalgia, tetany, whole body itch, skin ulcer, in poor health and neurasthenia.Modern medicine study confirms, the high nutritive value of shrimp, can strengthen immunity and the property function of human body, tonifying kidney and strengthening yang, premature senescence resistance; Dried small shrimp has sedation, is commonly used to treat neurasthenia, all diseases of vegetative nerve functional disturbance; Containing three kinds of important fatty acid in shrimp, people can be made to keep energy to concentrate for a long time; Containing a large amount of cobalamin in shrimp, be rich in zinc, iodine and selenium simultaneously, heat and fat lower, nutritious, and its meat is soft, easy to digest, in poor health and need the people taken good care of to be fabulous food after being ill; The abundant magnesium contained in shrimp has important regulating action to cardiomotility, well can protect cardiovascular system, reduces blood cholesterol level, prevents arteriosclerosis, simultaneously can also coronary artery dilator, is conducive to preventing hypertension and myocardial infarction; Astaxanthin in shrimp body contributes to eliminating " jet lag " that produce because of jet lag, has benifit to the healthy pole of the mankind.
China is prawn production state maximum in the world, is also in the world to the Main Trade state of shrimp products, and in recent years, due to the restriction of soil and water resource, intensive highly dense aquaculture model becomes the main aquaculture model of prawn.Dissolved oxygen affects the most important water quality factor of prawn culturing (horse is true to adopt Application of Delphi Method research to find, 2010), due to comprehensive function that is biological and chemical factors, often there is the phenomenon of dissolved oxygen deficiency in high-density breeding shrimp pond, in low dissolved oxygen water body, prawn reduces tolerances such as temperature, salinity, ammonia nitrogen, hydrogen sulphide, declines to virus, bacterial immune power, minimizing growth of casting off a skin slows down, and lethality increases.The resistance to low dissolved oxygen proterties of prawn becomes the important character affecting its growth, survival, but the prawn kind of domestic seed selection: Chinese prawn " Huanghai No.1 ", " No. 2, the Huanghai Sea ", Environment of Litopenaeus vannamei Low " in emerging No. 1 ", " No. 1, middle section ", " No. 1, section sea ", " No. 1, sea, osmanthus ", main or with growth and disease resistance trait for selective goal.
Have been reported in plant and other animals, improve its growth, survival performance by the selection of degeneration-resistant proterties, resistance to low dissolved oxygen proterties, as the degeneration-resistant proterties of one, has important seed selection and is worth.Therefore, invent the selection of a kind of resistance to low dissolved oxygen prawn, cultivate the prawn new varieties of resistance to low dissolved oxygen, occur when effectively solving prawn high-density breeding that low dissolved oxygen affects prawn growth, causes a difficult problem for prawn death, the development of prawn high-density breeding industry will be promoted greatly.
Breeding is the important foundation of culture fishery sustainable development, research about prawn fine-variety breeding never stops, Chinese invention " a kind of selection of Environment of Litopenaeus vannamei Low breeding ", application number 201410039044.5 provides the selection of the Environment of Litopenaeus vannamei Low breeding of a kind of high yield, degeneration-resistant applicable high salinity and low salinity stocking environment; Chinese invention " a kind of Marsupenaeus japonicus family builds and selection ", application number 201110278874.X provides a kind of Marsupenaeus japonicus younger sister cousin-german family and builds the method with seed selection, but the research low for low dissolved oxygen environment prawn culturing survival rate have not been reported.
Summary of the invention
The object of this invention is to provide the family selective breeding method of the resistance to low dissolved oxygen kind of a kind of prawn, to solve in high-density breeding process, the prawn poor growth that water hypoxia causes, the problem that cultivation survival rate is low.
For achieving the above object, the technical solution used in the present invention is as follows:
The resistance to low dissolved oxygen family selective breeding method of a kind of prawn, comprises the steps:
(1) foundation of basic population: collect from Florida of U.S. prawn improvement company SIS, Kona gulf marine resources company Konna Bay, Oceanic Institute of Hawaii OI, Thailand honest Qin Xia company ZD and domestic seed selection emerging No. 1, No. 1, middle section, No. 1 close shrimp in sea, osmanthus as colony, set up 15 mating combinations as seed selection basic population by mass mating;
(2) F1 generation family is built: from above-mentioned 15 mating combinations, by 2% selection intensity, picking individual is large, female shrimp 45 ~ 65g, the individuality of male shrimp 35 ~ 55g, male and female shrimp gonad development is normal, appendage is complete, anosis, honey stomach, to external world irritant reaction responsive, reserves seed for planting, by the mode of artificial insemination as close shrimp, by female-male proportion 2:1, setting up family full-sibs 60 ~ 100, paternal half-sib family 30 ~ 50, is F1 generation family;
(3) cultivate with pond: each F1 generation family prawn gets 400 tail shrimp seedlings in 3m × 1m × 1m net cage respectively from the young shrimp stage, the cleaned and changed net cage screen cloth of every 8 ~ 12d, common environmental cultivation is carried out in the large pond that whole net cage is placed in 20m × 30m × 1.5m;
(4) anti-low dissolved oxygen test: when each F1 generation prawn cultivates February and May in common environmental, from each family, randomly draw 30 tail prawns respectively measure prawn body weight, body is long, body length, uromere is long, body width, sampling prawn is carried out optic stalk collar mark, the prawn marked supports 2d temporarily in shrimp pond, if any dead shrimp, from its place family, randomly draw the measurement of prawn mark be supplemented to 30 tails, experiment prawn is put in the round plastic bucket of 800L, treat that dissolved oxygen in water body is consumed to 1.2mg.L-1 and starts timing by prawn, oxygen ranges by adjusting air valve controls to make water body dissolved oxygen maintain 0.8 ~ 1.2mg.L-1(96 hour preliminary experiment and determines), carry out 94h low dissolved oxygen stress, being placed with water pump in bucket, to maintain upper and lower water body dissolved oxygen even, every 1h detects water body dissolved oxygen situation, every 8h detects prawn survival condition, dead and survive prawn to different time sections during each family dissolved oxygen stress, carry out the trait related SNP locus of gene analysis of anti-low dissolved oxygen,
(5) data analysis: utilize ASReml software, adopt multiple characters individual animal model estimation growth traits and resistance to low dissolved oxygen Trait heritability and genetic correlation, prediction growth traits and resistance to low dissolved oxygen proterties breeding value, result shows: the heritability of body weight is 0.27 ± 0.11(medium heritability), resistance to low dissolved oxygen heredity is 0.13 ± 0.07(medium heritability), between body weight and resistance to low dissolved oxygen, genetic correlation is 0.22 ± 0.09, equal Z-Score inspection significantly (P<0.05), adopt 5 monthly age weight character breeding value weightings 50% to add 5 monthly ages low dissolved oxygen survival breeding value weighting 50% and calculate to obtain selection index, screen 20 high familys of families selecting index as family of reserving seed for planting,
(6) F2 is built for family: large, energetic, normal female shrimp 20 tail of gonad development of picking individual from 20 familys of reserving seed for planting, male shrimp 10 tail is as parent, control inbreeding coefficient less than 0.1, build full sibs (half sibs) family by directional cross, build F2 for family;
(7) subculture is selected: by the successive selection of above-mentioned experiment family through 4 generations, in the family that the excellent resistance to low dissolved oxygen performance of growth performance is strong, select the family that affiliation is far away, therefrom large, energetic, the normal male and female prawn of gonad development of picking individual is as parent, breeds offspring as improved seeds for production application.
The present invention selects multiple genetic background different, and colony based on the prawn colony of growth performance excellence, ensure that abundant genetic diversity; Parent's genetic background is clear, by the mating of setting inbreeding coefficient, effectively avoids occurring inbreeding phenomenon in Breeding Process; Adopt artificial insemination, to set up entirely by the mode of female-male proportion 2:1, family half sibs, can calculate the genetic parameter of resistance to low dissolved oxygen proterties and other proterties, better formulate selection scheme; Carry out in common environmental cultivation February and May, fully take into account the impact of common environmental benefit size on the low dissolved oxygen tolerance of prawn.
The invention has the beneficial effects as follows: adopt the resistance to low dissolved oxygen family selective breeding method of a kind of prawn of the present invention, that can shorten resistance to low dissolved oxygen prawn family forms the cycle, reduce maintenance cost, and convenient management, and can solve in high-density breeding process, the prawn poor growth that water hypoxia causes, the problem that cultivation survival rate is low.
Embodiment
Be described in further details the present invention below by example, these examples are only used for the present invention is described, do not limit the scope of the invention.
The present invention carries out in Zhanjiang, Guangdong Province Hai Wei Aquaculture Corporation:
Embodiment 1
The resistance to low dissolved oxygen family selective breeding method of a kind of prawn, comprises the steps:
(1) foundation of basic population: collect from Florida of U.S. prawn improvement company SIS, Kona gulf marine resources company Konna Bay, Oceanic Institute of Hawaii OI, Thailand honest Qin Xia company ZD and domestic seed selection emerging No. 1, No. 1, middle section, No. 1 close shrimp in sea, osmanthus as colony, set up 15 mating combinations as seed selection basic population by mass mating;
(2) F1 generation family is built: from above-mentioned 15 mating combinations, by 2% selection intensity, picking individual is large, female shrimp 45g, the individuality of male shrimp 35g, female shrimp 300 tail, male shrimp 100 tail, male and female shrimp gonad development is normal, appendage is complete, anosis, honey stomach, to external world irritant reaction responsive, reserves seed for planting, by the mode of artificial insemination as close shrimp, by female-male proportion 2:1, setting up family full-sibs 60, paternal half-sib family 30, is F1 generation family;
(3) cultivate with pond: each F1 generation family prawn gets 400 tail shrimp seedlings in 3m × 1m × 1m net cage respectively from the young shrimp stage, the cleaned and changed net cage screen cloth of every 8d, common environmental cultivation is carried out in the large pond that whole net cage is placed in 20m × 30m × 1.5m;
(4) anti-low dissolved oxygen test: when each F1 generation prawn cultivates February and May in common environmental, from each family, randomly draw 30 tail prawns respectively measure prawn body weight, body is long, body length, uromere is long, body width, sampling prawn is carried out optic stalk collar mark, the prawn marked supports 2d temporarily in shrimp pond, if any dead shrimp, from its place family, randomly draw the measurement of prawn mark be supplemented to 30 tails, experiment prawn is put in the round plastic bucket of 800L, treat that dissolved oxygen in water body is consumed to 1.2mg.L-1 and starts timing by prawn, oxygen ranges by adjusting air valve controls to make water body dissolved oxygen maintain 0.8 ~ 1.2mg.L-1(96 hour preliminary experiment and determines), carry out 94h low dissolved oxygen stress, being placed with water pump in bucket, to maintain upper and lower water body dissolved oxygen even, every 1h detects water body dissolved oxygen situation, every 8h detects prawn survival condition, dead and survive prawn to different time sections during each family dissolved oxygen stress, carry out the trait related SNP locus of gene analysis of anti-low dissolved oxygen,
(5) data analysis: utilize ASReml software, adopts multiple characters individual animal model estimation growth traits and resistance to low dissolved oxygen Trait heritability and genetic correlation, predicts growth traits and resistance to low dissolved oxygen proterties breeding value.Result shows: the heritability of body weight is 0.27 ± 0.11(medium heritability), resistance to low dissolved oxygen heredity is 0.13 ± 0.07(medium heritability), between body weight and resistance to low dissolved oxygen, genetic correlation is 0.22 ± 0.09, and equal Z-Score inspection significantly (P<0.05).Adopt 5 monthly age weight character breeding value weightings 50% to add 5 monthly ages low dissolved oxygen survival breeding value weighting 50% and calculate to obtain selection index, screen the high family of families selecting index as family of reserving seed for planting.
(6) build F2 for family: large, energetic, normal female shrimp 20 tail of gonad development of picking individual from 20 familys of reserving seed for planting, male shrimp 10 tail, as parent, controls inbreeding coefficient less than 0.1, by the mode of artificial insemination, builds F2 for family;
(7) subculture is selected: by the successive selection of above-mentioned experiment family through 4 generations, in the family that the excellent resistance to low dissolved oxygen performance of growth performance is strong, select the family that affiliation is far away, therefrom large, energetic, the normal male and female prawn of gonad development of picking individual is as parent, breeds offspring as improved seeds for production application.
Embodiment 2
The resistance to low dissolved oxygen family selective breeding method of a kind of prawn, comprises the steps:
(1) foundation of basic population: collect from Florida of U.S. prawn improvement company SIS, Kona gulf marine resources company Konna Bay, Oceanic Institute of Hawaii OI, Thailand honest Qin Xia company ZD and domestic seed selection emerging No. 1, No. 1, middle section, No. 1 close shrimp in sea, osmanthus is as colony, adopt the technology of AFLP to carry out analysis of genetic diversity to separate sources parent shrimp, set up 15 mating combinations as seed selection basic population by mass mating;
(2) F1 generation family is built: from above-mentioned 15 mating combinations, by 2% selection intensity, picking individual is large, female shrimp 65g, the individuality of male shrimp 55g, female shrimp 400 tail, male shrimp 200 tail, male and female shrimp gonad development is normal, appendage is complete, anosis, honey stomach, to external world irritant reaction responsive, reserves seed for planting, by the mode of artificial insemination as close shrimp, by female-male proportion 2:1, setting up family full-sibs 100, paternal half-sib family 50, is F1 generation family;
(3) cultivate with pond: each F1 generation family prawn gets 400 tail shrimp seedlings in 3m × 1m × 1m net cage respectively from the young shrimp stage, the cleaned and changed net cage screen cloth of every 12d, common environmental cultivation is carried out in the large pond that whole net cage is placed in 20m × 30m × 1.5m;
(4) anti-low dissolved oxygen test: when each F1 generation prawn cultivates February and May in common environmental, from each family, randomly draw 30 tail prawns respectively measure prawn body weight, body is long, body length, uromere is long, body width, sampling prawn is carried out optic stalk collar mark, the prawn marked supports 2d temporarily in shrimp pond, if any dead shrimp, from its place family, randomly draw the measurement of prawn mark be supplemented to 30 tails, experiment prawn is put in the round plastic bucket of 800L, treat that dissolved oxygen in water body is consumed to 1.2mg.L-1 and starts timing by prawn, oxygen ranges by adjusting air valve controls to make water body dissolved oxygen maintain 0.8 ~ 1.2mg.L-1(96 hour preliminary experiment and determines), carry out 94h low dissolved oxygen stress, being placed with water pump in bucket, to maintain upper and lower water body dissolved oxygen even, every 1h detects water body dissolved oxygen situation, every 8h detects prawn survival condition, dead and survive prawn to different time sections during each family dissolved oxygen stress, carry out the trait related SNP locus of gene analysis of anti-low dissolved oxygen,
(5) data analysis: utilize ASReml software, adopts multiple characters individual animal model estimation growth traits and resistance to low dissolved oxygen Trait heritability and genetic correlation, predicts growth traits and resistance to low dissolved oxygen proterties breeding value.Result shows: the heritability of body weight is 0.27 ± 0.11(medium heritability), resistance to low dissolved oxygen heredity is 0.13 ± 0.07(medium heritability), between body weight and resistance to low dissolved oxygen, genetic correlation is 0.22 ± 0.09, and equal Z-Score inspection significantly (P<0.05).Adopt 5 monthly age weight character breeding value weightings 50% to add 5 monthly ages low dissolved oxygens survival breeding value weighting 50% and calculate to obtain selection index, the conduct that screening families selecting index is high is reserved seed for planting family.
(6) build F2 for family: large, energetic, normal female shrimp 20 tail of gonad development of picking individual from family of reserving seed for planting, male shrimp 10 tail, as parent, controls inbreeding coefficient less than 0.1, by the mode of artificial insemination, builds F2 for family;
(7) subculture is selected: by the successive selection of above-mentioned experiment family through 4 generations, in the family that the excellent resistance to low dissolved oxygen performance of growth performance is strong, select the family that affiliation is far away, therefrom large, energetic, the normal male and female prawn of gonad development of picking individual is as parent, breeds offspring as improved seeds for production application.
The resistance to low dissolved oxygen family selective breeding method of embodiment 3 one kinds of prawns, comprise the steps: the foundation of (1) basic population: collect from Florida of U.S. prawn improvement company SIS, Kona gulf marine resources company Konna Bay, Oceanic Institute of Hawaii OI, Thailand honest Qin Xia company ZD and domestic seed selection emerging No. 1, No. 1, middle section, No. 1 close shrimp in sea, osmanthus as colony, set up 15 mating combinations as seed selection basic population by mass mating, (2) F1 generation family is built: from above-mentioned 15 mating combinations, by 2% selection intensity, picking individual is large, female shrimp 55g, the individuality of male shrimp 45g, female shrimp 400 tail, male shrimp 150 tail, male and female shrimp gonad development is normal, appendage is complete, anosis, honey stomach, to external world irritant reaction responsive, reserves seed for planting, by the mode of artificial insemination as close shrimp, by female-male proportion 2:1, setting up family full-sibs 80, paternal half-sib family 40, is F1 generation family, (3) cultivate with pond: each F1 generation family prawn gets 400 tail shrimp seedlings in 3m × 1m × 1m net cage respectively from the young shrimp stage, the cleaned and changed net cage screen cloth of every 10d, common environmental cultivation is carried out in the large pond that whole net cage is placed in 20m × 30m × 1.5m, (4) anti-low dissolved oxygen test: when each F1 generation prawn cultivates February and May in common environmental, from each family, randomly draw 30 tail prawns respectively measure prawn body weight, body is long, body length, uromere is long, body width, sampling prawn is carried out optic stalk collar mark, the prawn marked supports 2d temporarily in shrimp pond, if any dead shrimp, from its place family, randomly draw the measurement of prawn mark be supplemented to 30 tails, experiment prawn is put in the round plastic bucket of 800L, treat that dissolved oxygen in water body is consumed to 1.2mg.L-1 and starts timing by prawn, oxygen ranges by adjusting air valve controls to make water body dissolved oxygen maintain 0.8 ~ 1.2mg.L-1(96 hour preliminary experiment and determines), carry out 94h low dissolved oxygen stress, being placed with water pump in bucket, to maintain upper and lower water body dissolved oxygen even, every 1h detects water body dissolved oxygen situation, every 8h detects prawn survival condition, dead and survive prawn to different time sections during each family dissolved oxygen stress, carry out the trait related SNP locus of gene analysis of anti-low dissolved oxygen,
(5) data analysis: utilize ASReml software, adopts multiple characters individual animal model estimation growth traits and resistance to low dissolved oxygen Trait heritability and genetic correlation, predicts growth traits and resistance to low dissolved oxygen proterties breeding value.Result shows: the heritability of body weight is 0.27 ± 0.11(medium heritability), resistance to low dissolved oxygen heredity is 0.13 ± 0.07(medium heritability), between body weight and resistance to low dissolved oxygen, genetic correlation is 0.22 ± 0.09, and equal Z-Score inspection significantly (P<0.05).Adopt 5 monthly age weight character breeding value weightings 50% to add 5 monthly ages low dissolved oxygen survival breeding value weighting 50% and calculate to obtain selection index, screen 20 higher familys of families selecting index as family of reserving seed for planting.
(6) build F2 for family: large, energetic, normal female shrimp 20 tail of gonad development of picking individual from family of reserving seed for planting, male shrimp 10 tail, as parent, controls inbreeding coefficient less than 0.1, by the mode of artificial insemination, builds F2 for family;
(7) subculture is selected: by the successive selection of above-mentioned experiment family through 4 generations, in the family that the excellent resistance to low dissolved oxygen performance of growth performance is strong, select the family that affiliation is far away, therefrom large, energetic, the normal male and female prawn of gonad development of picking individual is as parent, breeds offspring as improved seeds for production application.
Embodiment 4
The resistance to low dissolved oxygen family selective breeding method of a kind of prawn, comprises the steps:
(1) foundation of basic population: collect from Florida of U.S. prawn improvement company SIS, Kona gulf marine resources company Konna Bay, Oceanic Institute of Hawaii OI, Thailand honest Qin Xia company ZD and domestic seed selection emerging No. 1, No. 1, middle section, No. 1 close shrimp in sea, osmanthus is as colony, adopt the technology of AFLP to carry out analysis of genetic diversity to separate sources parent shrimp, set up 15 mating combinations as seed selection basic population by mass mating;
(2) F1 generation family is built: from above-mentioned 15 mating combinations, by 2% selection intensity, picking individual is large, female shrimp 50g, the individuality of male shrimp 40g, female shrimp 350 tail, male shrimp 150 tail, male and female shrimp gonad development is normal, appendage is complete, anosis, honey stomach, to external world irritant reaction responsive, reserves seed for planting, by the mode of artificial insemination as close shrimp, by female-male proportion 2:1, setting up family full-sibs 70, paternal half-sib family 35, is F1 generation family;
(3) cultivate with pond: each F1 generation family prawn gets 400 tail shrimp seedlings in 3m × 1m × 1m net cage respectively from the young shrimp stage, the cleaned and changed net cage screen cloth of every 9d, common environmental cultivation is carried out in the large pond that whole net cage is placed in 20m × 30m × 1.5m;
(4) anti-low dissolved oxygen test: when each F1 generation prawn cultivates February and May in common environmental, from each family, randomly draw 30 tail prawns respectively measure prawn body weight, body is long, body length, uromere is long, body width, sampling prawn is carried out optic stalk collar mark, the prawn marked supports 2d temporarily in shrimp pond, if any dead shrimp, from its place family, randomly draw the measurement of prawn mark be supplemented to 30 tails, experiment prawn is put in the round plastic bucket of 800L, treat that dissolved oxygen in water body is consumed to 1.2mg.L-1 and starts timing by prawn, oxygen ranges by adjusting air valve controls to make water body dissolved oxygen maintain 0.8 ~ 1.2mg.L-1(96 hour preliminary experiment and determines), carry out 94h low dissolved oxygen stress, being placed with water pump in bucket, to maintain upper and lower water body dissolved oxygen even, every 1h detects water body dissolved oxygen situation, every 8h detects prawn survival condition, dead and survive prawn to different time sections during each family dissolved oxygen stress, carry out the trait related SNP locus of gene analysis of anti-low dissolved oxygen,
(5) data analysis: utilize ASReml software, adopts multiple characters individual animal model estimation growth traits and resistance to low dissolved oxygen Trait heritability and genetic correlation, predicts growth traits and resistance to low dissolved oxygen proterties breeding value.Result shows: the heritability of body weight is 0.27 ± 0.11(medium heritability), resistance to low dissolved oxygen heredity is 0.13 ± 0.07(medium heritability), between body weight and resistance to low dissolved oxygen, genetic correlation is 0.22 ± 0.09, and equal Z-Score inspection significantly (P<0.05).Adopt 5 monthly age weight character breeding value weightings 50% to add 5 monthly ages low dissolved oxygen survival breeding value weighting 50% and calculate to obtain selection index, screen 20 high familys of families selecting index as family of reserving seed for planting.
(6) build F2 for family: large, energetic, normal female shrimp 20 tail of gonad development of picking individual from 20 familys of reserving seed for planting, male shrimp 10 tail, as parent, controls inbreeding coefficient less than 0.1, by the mode of artificial insemination, builds F2 for family;
(7) subculture is selected: by the successive selection of above-mentioned experiment family through 4 generations, in the family that the excellent resistance to low dissolved oxygen performance of growth performance is strong, select the family that affiliation is far away, therefrom large, energetic, the normal male and female prawn of gonad development of picking individual is as parent, breeds offspring as improved seeds for production application.
Embodiment 5
The resistance to low dissolved oxygen family selective breeding method of a kind of prawn, comprises the steps:
(1) foundation of basic population: collect from Florida of U.S. prawn improvement company SIS, Kona gulf marine resources company Konna Bay, Oceanic Institute of Hawaii OI, Thailand honest Qin Xia company ZD and domestic seed selection emerging No. 1, No. 1, middle section, No. 1 close shrimp in sea, osmanthus is as colony, adopt the technology of AFLP to carry out analysis of genetic diversity to separate sources parent shrimp, set up 15 mating combinations as seed selection basic population by mass mating;
(2) F1 generation family is built: from above-mentioned 15 mating combinations, by 2% selection intensity, picking individual is large, female shrimp 60g, the individuality of male shrimp 50g, female shrimp 300 tail, male shrimp 150 tail, male and female shrimp gonad development is normal, appendage is complete, anosis, honey stomach, to external world irritant reaction responsive, reserves seed for planting, by the mode of artificial insemination as close shrimp, by female-male proportion 2:1, setting up family full-sibs 90, paternal half-sib family 45, is F1 generation family;
(3) cultivate with pond: each F1 generation family prawn gets 400 tail shrimp seedlings in 3m × 1m × 1m net cage respectively from the young shrimp stage, the cleaned and changed net cage screen cloth of every 11d, common environmental cultivation is carried out in the large pond that whole net cage is placed in 20m × 30m × 1.5m;
(4) anti-low dissolved oxygen test: when each F1 generation prawn cultivates February and May in common environmental, from each family, randomly draw 30 tail prawns respectively measure prawn body weight, body is long, body length, uromere is long, body width, sampling prawn is carried out optic stalk collar mark, the prawn marked supports 2d temporarily in shrimp pond, if any dead shrimp, from its place family, randomly draw the measurement of prawn mark be supplemented to 30 tails, experiment prawn is put in the round plastic bucket of 800L, treat that dissolved oxygen in water body is consumed to 1.2mg.L-1 and starts timing by prawn, oxygen ranges by adjusting air valve controls to make water body dissolved oxygen maintain 0.8 ~ 1.2mg.L-1(96 hour preliminary experiment and determines), carry out 94h low dissolved oxygen stress, being placed with water pump in bucket, to maintain upper and lower water body dissolved oxygen even, every 1h detects water body dissolved oxygen situation, every 8h detects prawn survival condition, dead and survive prawn to different time sections during each family dissolved oxygen stress, carry out the trait related SNP locus of gene analysis of anti-low dissolved oxygen,
(5) data analysis: utilize ASReml software, adopts multiple characters individual animal model estimation growth traits and resistance to low dissolved oxygen Trait heritability and genetic correlation, predicts growth traits and resistance to low dissolved oxygen proterties breeding value.Result shows: the heritability of body weight is 0.27 ± 0.11(medium heritability), resistance to low dissolved oxygen heredity is 0.13 ± 0.07(medium heritability), between body weight and resistance to low dissolved oxygen, genetic correlation is 0.22 ± 0.09, and equal Z-Score inspection significantly (P<0.05).Adopt 5 monthly age weight character breeding value weightings 50% to add 5 monthly ages low dissolved oxygen survival breeding value weighting 50% and calculate to obtain selection index, screen 20 high familys of families selecting index as family of reserving seed for planting.
(6) build F2 for family: large, energetic, normal female shrimp 20 tail of gonad development of picking individual from family of reserving seed for planting, male shrimp 10 tail, as parent, controls inbreeding coefficient less than 0.1, by the mode of artificial insemination, builds F2 for family;
(7) subculture is selected: by the successive selection of above-mentioned experiment family through 4 generations, in the family that the excellent resistance to low dissolved oxygen performance of growth performance is strong, select the family that affiliation is far away, therefrom large, energetic, the normal male and female prawn of gonad development of picking individual is as parent, breeds offspring as improved seeds for production application.
The resistance to low dissolved oxygen family that the present invention filters out is significantly higher than survival rate average in the survival rate of low-oxygen environment, survival rate improves and within 25.72%, 2014, cultivates that this kind parent shrimp breeding populations is higher than control population survival rate by 21.42% 5000 mu of high-density breeding conditions, output increased 23.74%.

Claims (3)

1. the resistance to low dissolved oxygen family selective breeding method of prawn, is characterized in that: comprise the steps:
(1) foundation of basic population: collect from Florida of U.S. prawn improvement company SIS, Kona gulf marine resources company Konna Bay, Oceanic Institute of Hawaii OI, Thailand honest Qin Xia company ZD and domestic seed selection emerging No. 1, No. 1, middle section, No. 1 close shrimp in sea, osmanthus is as colony, adopt the technology of AFLP to carry out analysis of genetic diversity to separate sources parent shrimp, set up 15 mating combinations as seed selection basic population by mass mating;
(2) build F1 generation family: from above-mentioned 15 mating combinations, by 2% selection intensity, the conduct parent shrimp that picking individual is large is reserved seed for planting, by the mode of artificial insemination, according to female-male proportion 2:1, set up family full-sibs 60 ~ 100, paternal half-sib family 30 ~ 50, as F1 generation family;
(3) cultivate with pond: each F1 generation family prawn gets 400 tail shrimp seedlings in 3m × 1m × 1m net cage respectively from the young shrimp stage, the cleaned and changed net cage screen cloth of every 8 ~ 12d, common environmental cultivation is carried out in the large pond that whole net cage is placed in 20m × 30m × 1.5m;
(4) anti-low dissolved oxygen test: each F1 generation prawn in common environmental, cultivate 2 months and 5 months time, from each family, randomly draw 30 tail prawns respectively measure prawn body weight, body length, body length, uromere length, body width, sampling prawn is carried out optic stalk collar mark, the prawn marked supports 2d temporarily in shrimp pond, then experiment prawn is put in the round plastic bucket of 800L, treat that dissolved oxygen in water body is consumed to 1.2mg.L-1 and starts timing by prawn, control to make water body dissolved oxygen maintain 0.8 ~ 1.2mg.L by adjusting air valve -1, carry out 94h low dissolved oxygen stress, be placed with water pump in bucket and maintain upper and lower water body dissolved oxygen evenly, every 1h detects water body dissolved oxygen situation, and every 8h detects prawn survival condition, filters out the family that the anti-low dissolved oxygen ability of growth performance excellence is strong, line item analysis of going forward side by side;
(6) build F2 for family: large, energetic, normal female shrimp 20 tail of gonad development of picking individual from family of reserving seed for planting, male shrimp 10 tail, as parent, controls inbreeding coefficient less than 0.1, by the mode of artificial insemination, builds F2 for family;
(7) subculture is selected: by the successive selection of above-mentioned experiment family through 4 generations, in the family that the excellent resistance to low dissolved oxygen performance of growth performance is strong, select the family that affiliation is far away, therefrom large, energetic, the normal male and female prawn of gonad development of picking individual is as parent, breeds offspring as improved seeds for production application.
2. the resistance to low dissolved oxygen family selective breeding method of a kind of prawn according to claim 1, it is characterized in that: the described close shrimp of step (2) refers to individual large, female shrimp 45 ~ 65g, male shrimp 35 ~ 55g, male and female shrimp gonad development is normal, appendage is complete, the individuality of anosis, honey stomach, to external world irritant reaction sensitivity.
3. the resistance to low dissolved oxygen family selective breeding method of a kind of prawn according to claim 1, is characterized in that: the female-male proportion of the described experiment family of step (5) is 2:1, and inbreeding coefficient controls below 0.1.
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CN110710481A (en) * 2019-12-03 2020-01-21 江苏省海洋水产研究所 Method for selecting seeds of palaemon carinicauda with low oxygen resistance
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