CN102524181B - Method for cultivating new strain of meat type large-tailed han sheep - Google Patents
Method for cultivating new strain of meat type large-tailed han sheep Download PDFInfo
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Abstract
A method for cultivating a new strain of meat type large-tailed han sheep includes: using female Henan large-tailed han sheep as female parents and using male Suffolk sheep and male Dorper sheep as male parents; subjecting the female parents and the male parents to hybridization and crossing; and cultivating the new strain of meat type large-tailed han sheep according to phenotypic selection. The method is simple and high in meat production rate, meat is fresh and delicious, and the method is suitable for production of fat lambs. The new strain obtained by the method has phenotypic characteristics: physical tallness, average height being 80cm, and large chest width being 110cm averagely; straight back and waist, full hindquarter, strong limbs, and firm muscle; tail being above a hock; male lamb birth weight being larger than 4.5kg, 6-month-old lamb weight being larger than 40kg, and backfat thickness being smaller than 0.5cm; female lamb birth weight being larger than 4.3kg, 6-month-old lamb weight being larger than 36kg, and backfat thickness being smaller than 0.5cm; and female sheep lamping rate being larger than 190%.
Description
Technical field
The present invention relates to a kind of breeding method of sheep strain, the breeding method of the cold sheep new lines of a kind of specifically meat big tail.
Background technology
The producing region, center of the cold sheep of the big tail in Henan is your river valley in the north of Pingdingshan City, is distributed in the part small towns of Jiaxian County and Baofeng County.The cold sheep build of the big tail in Henan is rectangle, and physique is solid, and physique is bigger, and chest breadth is dark, and four limbs are solid strong, have that adaptability is strong, crude feed tolerance, easily feed, characteristics such as premunition is strong, adopt the feeding manner of herding mostly with drylot feeding.The cold sheep of the big tail in Henan has following characteristic: at first be to grow soon: public lamb birth weight is 3.72kg, and ewe lamb is 3.26kg, and after the clip in spring season, the ram weight average is 74.43kg more than 2 years old, and the weight average of the ewe that grows up more than 3 years old is 51.48kg.Next is that meat fat performance is good: because its lipopexia is lean in the trunk at afterbody, and succulence Fresh ﹠ Tender in Texture, delicious, preferable with lamb meat, dressing percentage is 47.4%-51.6%, pure meat percentage is 42%-55%.Be the reproduction rate height secondarily: the ewe sexual maturity on average at 171 ages in days, is oestrused throughout the year, and lambing percentage is 205%, and the cold sheep of the big tail in Henan has crude feed tolerance, manageability, and the disposition docility, happiness temperature and heat-resisting is not good at running and pedaling height, gets used to drylot feeding, characteristic such as also can herd.
Because the cold suet tail of the big tail in Henan is handicapped too greatly, progressively by the cold sheep improvement of little tail, purebred quantity reduces year by year in recent years, also because the protection mechanism of landrace self is unsound, protects kind ineffective.Make that the cold sheep physique of the big tail in Henan is short and small, dressing percentage and pure meat percentage are relatively low.
Summary of the invention
Purpose of the present invention provides the breeding method of the cold sheep new lines of a kind of meat big tail for addressing the above problem, and its breeding method is simple, the meat productivity height, and delicious meat is fit to prime lamb production.
The present invention addresses the above problem the technical scheme that is adopted to be: the breeding method of the cold sheep new lines of a kind of meat big tail may further comprise the steps:
Step 1, according to the BLUP method, select 45 of 900 of the cold sheep ewes of the good big tail in Henan, 30 of Suffolk rams and Du's pool sheep rams, respectively the constructional base group;
Step 2, the pool sheep ram of selecting to shut out are male parent, are female parent with the cold sheep ewe of the big tail in Henan, hybridize, obtain F1 for hybrid population, F1 for hybrid population in, the ram that produces all eliminate, according to the maternal selection criteria I of hybrid population, 600 of the outstanding ewes of selecting and remain are formed first-filial generation basis female flock of sheep;
Step 3, selection first-filial generation basis female flock of sheep are maternal, with the Suffolk ram as male parent, carry out two-way cross, obtain F2 for hybrid population, F2 for hybrid population in, respectively according to maternal selection criteria II of hybrid population and the paternal selection criteria of hybrid population, 400 of the outstanding ewes of selecting and remain, 20 of outstanding rams are formed second filial generation basis female flock of sheep and second filial generation basis ram group;
Step 4, be female parent with second filial generation basis female flock of sheep, with second filial generation basis ram group is male parent, carry out traversed by, obtain traversed by half-blood group, in traversed by half-blood group, respectively according to maternal selection criteria II of hybrid population and the paternal selection criteria of hybrid population, 100 of the outstanding ewes of selecting and remain, 10 of outstanding rams are formed traversed by two godmother flock of sheep and traversed by two generations ram group;
Step 5, with traversed by two generations basis female flock of sheep and two generations of traversed by basis ram group, carry out the closed group of 3-5 generations according to new lines seed selection standard and breed, cultivate the cold sheep new lines of a kind of meat big tail;
The maternal selection criteria I of described hybrid population is: 1. ewe physique is tall and big, and height is greater than 70cm; 2. birth weight is greater than 3.4kg, and 6 monthly age body weight are greater than 37kg; 3. the thickness of backfat is less than 0.5cm; 4. lambing percentage is greater than 170%;
The paternal selection criteria of described hybrid population is: 1. height is greater than 80cm, more than the chest breadth 110cm; 2. the rear quarters growth is plentiful, and four limbs are sturdy solid, fleshiness; 3. birth weight is greater than 4.5kg, and 6 monthly age body weight are greater than 40kg; 4. the thickness of backfat is less than 0.5cm;
The maternal selection criteria II of described hybrid population is: 1. height is greater than 70cm; 2. birth weight is greater than 4.3kg, and 6 monthly age body weight are greater than 36kg; 3. the thickness of backfat is less than 0.5cm; 4. lambing percentage is greater than 190%;
The phenotypic characteristic of described new lines: physique is tall and big, and average height is 80cm, and chest breadth is dark, and average chest breadth is 110cm; Back of the body waist is straight, and rear quarters is grown plentiful, and four limbs are sturdy solid, fleshiness; Tail is more than hock joint; Public lamb birth weight is greater than 4.5kg, and 6 monthly age body weight are greater than 40kg, and the thickness of backfat is less than 0.5cm; The ewe lamb birth weight is greater than 4.3kg, and 6 monthly age body weight are greater than 36kg, and the thickness of backfat is less than 0.5cm; The ewe lambing percentage is greater than 190%.
Described BLUP method has that estimated value does not have partially, estimated value variance minimum, can eliminate the characteristics such as deviation because of reason such as selecting and eliminate to cause, the individual breeding value that obtains has best linear unbiasedness, is breeding stock heredity assessment method main in world today's scope; Best: the evaluated error minimum; Estimate relevant with true breeding value maximum; Linear: as to estimate to be based on linear model, suppose that individual performance is the summation of heredity and non-hereditary effect; Do not have partially: estimated value is no inclined to one side in the estimation procedure, estimate with truly between breeding value average deviation be zero, promptly might estimated value mean value equal true breeding value; Prediction: an individuality will be used as parent's prediction breeding value;
The Phenotypic Selection standard of the cold sheep ewe of the big tail in Henan: hair color is white entirely, and the head size is medium, and forehead is slightly wide, ear hangs down forward generally, bridge of the nose protuberance, and physique is solid, chest breadth is dark, and rib is opened a business good, and back of the body waist is straight, buttocks tilts, and four limbs are solid strong, hard hooves, the broadtail hypertrophy is the palm-leaf fan type, inboard nothing hair, the skin exquisiteness generally hangs down to the following (tarsal joint (Art.tarsi): claim hock joint again of hock joint, by the focile far-end, the single shaft compound articulation that shank and metatarsal near-end constitute), peach type tail point is close to the tail ditch, and the ewe broadtail is heavy less than 4.5kg, and build is rectangle, physique is bigger, body weight is greater than 55kg, the reproductive performance height, and lambing percentage is the ewe more than 190%;
The Phenotypic Selection standard of Suffolk ram: the neck tubbiness, chest breadth is dark, and back of the body waist is straight, and rear quarters is grown plentiful, and four limbs are sturdy solid, fleshiness, physique is big, bridge of the nose protuberance, the body body is a white by hair, head and four limbs lower end brown, body weight is more than 120kg;
The Phenotypic Selection standard of Du's pool sheep ram: whole body white, neck is short and thick, and the shirtfront is plentiful, and shoulder breadth is thick, and back of the body waist is broad and smooth, the rib bed vault circle, buttocks Fang Yuan, rear quarters is muscular.Appendicular skeleton is thinner, the muscle evagination, and the bodily form is round barrel shape, and standing posture is rectified, and body weight is more than 100kg.
Beneficial effect
Because the meat productivity of the cold sheep of big tail is low, and the present invention cultivates the cold sheep new lines of the meat big tail that obtains, both kept outside the good fertility of the cold sheep of big tail, but also possessed the characteristics of the high meat productivity of good fortune gram sheep and Du Boyang, this new lines is compared with the cold sheep of big tail, it is fast to grow, and the public lamb of birth weight is 4.5kg, and ewe lamb is 4.3kg; Physique is tall and big and healthy and strong, and the ram body weight of growing up reaches more than the 110kg, and the ewe body weight reaches more than the 75kg.
The present invention cultivates the cold sheep new lines of the big tail that obtains, the meat productivity height, and delicious meat is fit to prime lamb production.
The present invention grows poor characteristics for solving the cold sheep forerunner of big tail, the big tail that the cultivates sheep new lines of tremble with fear, and its front mid-arnhole is dark, and back of the body waist is straight, makes its physique tall and big, increases the physique performance, thus the increase meat productivity.
The present invention is for solving the too big handicapped characteristics of the cold suet tail of big tail, the big tail that the cultivates sheep new lines of tremble with fear, and its tail is more than hock joint, and cabrage obviously reduces, and is convenient to walk and make things convenient for feeding and management.
The present invention cultivates the cold sheep new lines of the big tail that obtains, and its crude feed tolerance performance height is convenient to raise, and improves its survival rate, reduces production costs.
Embodiment
The breeding method of the cold sheep new lines of a kind of meat big tail may further comprise the steps:
Step 1, (BestLinearUnbiasedPrediction, BLUP) method are selected 45 of 900 of the cold sheep ewes of the good big tail in Henan, 30 of Suffolk rams and Du's pool sheep rams, respectively the constructional base group according to BLUP;
The selection criteria of the cold sheep ewe of the big tail in Henan: hair color is white entirely, and the head size is medium, and forehead is slightly wide, ear hangs down forward generally, bridge of the nose protuberance, and physique is solid, chest breadth is dark, and rib is opened a business good, and back of the body waist is straight, buttocks tilts, four limbs are solid strong, hard hooves, and the broadtail hypertrophy is the palm-leaf fan type, inboard nothing hair, the skin exquisiteness generally hangs down to below the hock joint, and peach type tail point is close to the tail ditch, the ewe broadtail is heavy less than 4.5kg, build is rectangle, and physique is bigger, and body weight is greater than 55kg, the reproductive performance height, lambing percentage is the ewe more than 190%;
The selection criteria of Suffolk ram: the neck tubbiness, chest breadth is dark, and back of the body waist is straight, and rear quarters is grown plentiful, and four limbs are sturdy solid, fleshiness, physique is big, bridge of the nose protuberance, the body body is a white by hair, head and four limbs lower end brown, body weight is more than 120kg;
The selection criteria of Du's pool sheep ram: whole body white, neck is short and thick, and the shirtfront is plentiful, and shoulder breadth is thick, and back of the body waist is broad and smooth, the rib bed vault circle, buttocks Fang Yuan, rear quarters is muscular.Appendicular skeleton is thinner, the muscle evagination, and the bodily form is round barrel shape, and standing posture is rectified, and body weight is more than 100kg;
Step 2, the pool sheep ram of selecting to shut out are male parent, are female parent with the cold sheep ewe of the big tail in Henan, hybridize, obtain F1 for hybrid population, F1 for hybrid population in, the ram that produces all eliminate, according to the maternal selection criteria I of hybrid population, 600 of the outstanding ewes of selecting and remain are formed first-filial generation basis female flock of sheep; The maternal selection criteria I of hybrid population is: ewe physique is tall and big, and height is greater than 70cm, and the shirtfront is plentiful, and back of the body waist is broad and smooth, rib bed vault circle, rear quarters is muscular, and lambing percentage is greater than 170%, bodily form approximate circle tubbiness, birth weight is greater than 3.4kg, and 6 monthly age body weight are greater than 37kg, and the thickness of backfat is less than 0.5cm;
Step 3, selection first-filial generation basis female flock of sheep are maternal, with the Suffolk ram as male parent, carry out two-way cross, obtain F2 for hybrid population, F2 for hybrid population in, respectively according to maternal selection criteria II of hybrid population and the paternal selection criteria of hybrid population, 400 of the outstanding ewes of selecting and remain, 20 of outstanding rams are formed second filial generation basis female flock of sheep and second filial generation basis ram group; The paternal selection criteria II of hybrid population is: height is greater than 80cm bridge of the nose protuberance, and chest breadth is dark, and chest breadth is greater than 110cm, and back of the body waist is straight, rear quarters is grown plentiful, and four limbs are sturdy solid, fleshiness, birth weight is greater than 4.5kg, and 6 monthly age body weight are greater than 40kg, and the thickness of backfat is less than 0.5cm; The maternal selection criteria II of hybrid population is, height is greater than 70cm, and birth weight is greater than 4.3kg, and 6 monthly age body weight are greater than 36kg, and the thickness of backfat is less than 0.5cm, and lambing percentage is greater than 190%;
Step 4, be female parent with second filial generation basis female flock of sheep, with second filial generation basis ram group is male parent, carry out traversed by, obtain traversed by half-blood group, in traversed by half-blood group, respectively according to maternal selection criteria II of hybrid population and the paternal selection criteria of hybrid population, 100 of the outstanding ewes of selecting and remain, 10 of outstanding rams are formed traversed by two godmother flock of sheep and traversed by two generations ram group;
Step 5, traversed by two generations basis female flock of sheep and two generations of traversed by basis ram group are carried out the closed group of 3-5 generations breed,, cultivate the cold sheep new lines of a kind of meat big tail according to the main phenotypic characteristic of new lines;
The phenotypic characteristic of described new lines: physique is tall and big, and average height is 80cm, bridge of the nose protuberance, and chest breadth is dark, and average chest is 110cm, and back of the body waist is straight, and rear quarters is grown plentiful, and four limbs are sturdy solid, and fleshiness, tail are more than hock joint, and the ewe lambing percentage is greater than 190%; Public lamb birth weight is greater than 4.5kg, and 6 monthly age body weight are greater than 40kg, and the thickness of backfat is less than 0.5cm, and the ewe lamb birth weight is greater than 4.3kg, and 6 monthly age body weight are greater than 36kg, and the thickness of backfat is less than 0.5cm.
Claims (1)
1. the breeding method of the cold sheep new lines of a meat big tail is characterized in that: may further comprise the steps:
Step 1, according to the BLUP method, select 45 of 900 of the cold sheep ewes of the good big tail in Henan, 30 of Suffolk rams and Du's pool sheep rams, respectively the constructional base group;
Step 2, the pool sheep ram of selecting to shut out are male parent, are female parent with the cold sheep ewe of the big tail in Henan, hybridize, obtain F1 for hybrid population, F1 for hybrid population in, the ram that produces all eliminate, according to the maternal selection criteria I of hybrid population, 600 of the outstanding ewes of selecting and remain are formed first-filial generation basis female flock of sheep;
Step 3, selection first-filial generation basis female flock of sheep are maternal, with the Suffolk ram as male parent, carry out two-way cross, obtain F2 for hybrid population, F2 for hybrid population in, respectively according to maternal selection criteria II of hybrid population and the paternal selection criteria of hybrid population, 400 of the outstanding ewes of selecting and remain, 20 of outstanding rams are formed second filial generation basis female flock of sheep and second filial generation basis ram group;
Step 4, be female parent with second filial generation basis female flock of sheep, with second filial generation basis ram group is male parent, carry out traversed by, obtain traversed by half-blood group, in traversed by half-blood group, respectively according to maternal selection criteria II of hybrid population and the paternal selection criteria of hybrid population, 100 of the outstanding ewes of selecting and remain, 10 of outstanding rams are formed traversed by two godmother flock of sheep and traversed by two generations ram group;
Step 5, with traversed by two godmother flock of sheep and traversed by two generations ram group, carry out the closed group of 3-5 generations according to new lines seed selection standard and breed, cultivate the cold sheep new lines of a kind of meat big tail;
The maternal selection criteria I of described hybrid population is: 1. ewe physique is tall and big, and height is greater than 70cm; 2. birth weight is greater than 3.4kg, and 6 monthly age body weight are greater than 37kg; 3. the thickness of backfat is less than 0.5cm; 4. lambing percentage is greater than 170%;
The paternal selection criteria of described hybrid population is: 1. height is greater than 80cm, more than the chest breadth 110cm; 2. birth weight is greater than 4.5kg, and 6 monthly age body weight are greater than 40kg; 3. the thickness of backfat is less than 0.5cm;
The maternal selection criteria II of described hybrid population is: 1. height is greater than 70cm; 2. birth weight is greater than 4.3kg, and 6 monthly age body weight are greater than 36kg; 3. the thickness of backfat is less than 0.5cm; 4. lambing percentage is greater than 190%;
The seed selection standard of described new lines: physique is tall and big, and average height is 80cm, and chest breadth is dark, and average chest breadth is 110cm; Tail is more than hock joint; Public lamb birth weight is greater than 4.5kg, and 6 monthly age body weight are greater than 40kg, and the thickness of backfat is less than 0.5cm; The ewe lamb birth weight is greater than 4.3kg, and 6 monthly age body weight are greater than 36kg, and the thickness of backfat is less than 0.5cm; The ewe lambing percentage is greater than 190%.
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| CN103404483B (en) * | 2013-08-05 | 2016-01-13 | 中国农业科学院兰州畜牧与兽药研究所 | The breeding method of Gansu meat sheep multiple-birth strain |
| CN103598145B (en) * | 2013-10-11 | 2016-02-10 | 宋青莲 | The hybridization breeding method of a kind of sheep |
| CN104186404B (en) * | 2014-04-24 | 2016-05-04 | 洛宁农本畜牧科技开发有限公司 | The hybridization breeding method of a kind of section agriculture mutton sheep new lines |
| CN111449022B (en) * | 2020-06-04 | 2022-03-29 | 河南牧业经济学院 | Method for breeding novel variety of Huang-Huai mutton sheep |
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