CN110679555B - Breeding method of artificial feed adaptive silkworm variety - Google Patents
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K67/00—Rearing or breeding animals, not otherwise provided for; New or modified breeds of animals
- A01K67/033—Rearing or breeding invertebrates; New breeds of invertebrates
- A01K67/04—Silkworms
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- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
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- A23K10/30—Animal feeding-stuffs from material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K10/00—Animal feeding-stuffs
- A23K10/30—Animal feeding-stuffs from material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms
- A23K10/37—Animal feeding-stuffs from material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms from waste material
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- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
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- A23K50/00—Feeding-stuffs specially adapted for particular animals
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Abstract
The invention discloses a breeding method of artificial feed adaptive silkworm varieties. Firstly, respectively breeding Chinese system silkworms and Japanese system silkworms of the current silkworm variety, carrying out 3 times of adaptive selection on each generation of silkworms by adopting 3 feeds, carrying out individual selection on the first 5 generations by adopting moth area mixed breeding, carrying out single moth breeding after the 5 th generation, carrying out breeding by adopting a method combining the moth area and the individual selection, carrying out breeding in three generations of spring, summer and autumn every year, continuously selecting more than 12 generations, carrying out hybridization on the obtained domestic silkworms with the Chinese system artificial feed adaptability and the Japanese system artificial feed adaptability, and obtaining a hybrid which is the artificial feed adaptability silkworm variety. The invention can obviously improve the ingestion of artificial feed of two mating strains, thereby improving the ingestion of hybrid seeds without re-establishing strains and having high breeding efficiency. The silkworm has the characteristics of strong vitality, cocoon silk character and good silkworm egg laying capacity.
Description
Technical Field
The invention relates to the technical field of silkworm breeding, in particular to a breeding method of an artificial feed adaptive silkworm variety.
Background
The sericulture industry in China has a long history, the currently cultivated silkworm is still the support industry in many rural areas, and the cultivated silkworm has very important status and function particularly in the processes of revitalizing and accurately removing poverty in the rural areas. The artificial feed for silkworm breeding is an epoch-making technical innovation in the silkworm breeding industry and is a symbol for the modernization of the silkworm industry. The artificial feed silkworm breeding improves the traditional production mode of planting mulberry firstly and then breeding silkworm, so that the silkworm breeding production gets rid of the limitation of seasons and natural conditions, the continuous silkworm breeding all year round can be realized, the mechanization and the industrialization are favorably realized, and a new way for obviously improving the silkworm breeding production efficiency is developed; the artificial feed is adopted for silkworm breeding, so that silkworm diseases and pesticide poisoning can be effectively prevented, the silkworm safety is guaranteed, and the artificial feed has important significance for preventing the microparticle disease and producing nontoxic silkworm eggs; the artificial feed breeding is an effective means for producing exogenous active protein by using silkworms as a bioreactor; meanwhile, the artificial feed for silkworm breeding also provides convenient conditions for basic theoretical researches of the nutrition physiology, the pathology and the like of the silkworms; the artificial feed breeding of silkworms has wide application prospect, and especially under the conditions of rapid development of national economy, continuous innovation of agricultural production mode, increasingly improved mechanization degree and continuous deterioration of silkworm breeding environment in China, the specialization and annual factory production of silkworm breeding are the necessary ways, and the artificial feed breeding of silkworms is a fundamental way for achieving the aim.
The research of domestic silkworm artificial feed begins in 70 s of 20 th century, and the breeding of silkworm with artificial feed in several units is successful. Subsequently, many domestic silkworm research institutions and universities have successively conducted research on artificial feeds, and have widely conducted an investigation on the adaptability of silkworm varieties to artificial feeds. Some research results are obtained in the aspects of feed formula improvement, feeding technology and the like. However, the artificial feed silkworm breeding technology in China at present has extremely low popularization rate in production, and the main limiting factor is the lack of artificial feed adaptability silkworm varieties. Although some researchers carry out successive selection by taking the hair thinning rate 24 hours after the harvesting of ants as an index, the silkworm strain with obviously improved artificial feed ingestion is also obtained, but the selection effect is poor, the breeding efficiency is low, and the artificial feed adaptive silkworm variety is not really bred. The domestic lack of artificial feed breeding adaptive silkworm varieties has many reasons, but one important reason is that the breeding method of the artificial feed adaptive varieties adopted in the past is improper, the selection effect is poor and the breeding efficiency is low.
Disclosure of Invention
Aiming at the prior art, the invention provides a breeding method of an artificial feed adaptive silkworm variety, which can quickly improve the ingestion of the silkworm to the artificial feed, has good cocoon silk character and silkworm egg laying attachment and greatly improves the breeding efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a breeding method of an artificial feed adaptive silkworm variety, which comprises the following steps:
(1) selecting and breeding by taking the China systemic silkworm of the current silkworm variety as a material: the method comprises the following steps of carrying out adaptive selection on silkworms of each generation for 3 times by using 3 feeds, carrying out individual selection on the silkworms in the first 5 generations by adopting moth area mixed breeding, carrying out single moth breeding after the 5 th generation, carrying out breeding by adopting a method combining the moth area and the individual selection, and continuously selecting more than 12 generations every year to obtain a Chinese system of the artificial feed adaptive silkworms;
(2) selecting and breeding by taking Japanese systematic silkworms of the current silkworm variety as materials: carrying out 3 times of artificial adaptive selection on silkworms of each generation by using 3 feeds, carrying out individual selection on the silkworms in the former 5 generations by adopting moth area mixed breeding, carrying out single moth breeding after the 5 th generation, carrying out breeding by adopting a method combining the moth area and the individual selection, and continuously selecting more than 12 generations every year to obtain a Japanese system of the artificial feed adaptive silkworms;
(3) and (3) hybridizing the Chinese system of the artificial feed adaptive silkworm bred in the step (1) with the Japanese system of the artificial feed adaptive silkworm bred in the step (2), and obtaining a hybrid, namely the artificial feed adaptive silkworm variety.
Preferably, in the step (1), the silkworm variety of the chinese system is one of pinus sylvestris a, pinus sylvestris B, or a hybrid of pinus sylvestris a and pinus sylvestris B.
Preferably, in step (2), the silkworm variety of the japanese system is one of the hybrids of gosteme a, gosteme B, or gosteme a and gosteme B.
Preferably, in the step (1) and the step (2), the selection of individuals for mixed culture of the moth areas is carried out according to the hair thinning rate, the silkworm raising rate, the development uniformity, the development duration and the individual quality.
Preferably, in the step (1) and the step (2), the method for rearing the single moth comprises the following steps: selecting 6-7 moth areas from the former generation silkworm moth-collecting area above 20 moth areas according to ingestion and development uniformity, and selecting 60-100 silkworms from the former generation silkworm moth-collecting area to breed to cocoons according to development speed and individual mass; the seeds are bred with the moth areas, and each moth area breeds more than 20 moth areas.
Preferably, in the step (1) and the step (2), the single moth breeding is carried out through the selection of the cocoon shape, the shrinkage and the evenness, the selection of the whole cocoon volume and the cocoon layer rate of the individual, and the selection of the cocoon shape, the shrinkage and the evenness are carried out simultaneously.
Preferably, in the step (1) and the step (2), each generation of silkworms uses 3 kinds of feeds: collecting ants with artificial feed M10, feeding for 24-48 hr, changing into artificial feed M33, feeding silkworms of 3 or 4 years old without stopping feeding, changing into mulberry leaf breeding, and feeding without stopping feeding until cocoons are formed.
Preferably, the artificial feed M10 comprises the following raw materials in parts by weight: 10% of mulberry leaf powder, 32% of soybean meal, 54% of corn flour, 2.5% of citric acid, 0.4-1.0% of sorbic acid, 0.4-1.0% of VC and 0.1% of florfenicol;
preferably, the artificial feed M33 comprises the following raw materials in parts by weight: 33% of mulberry leaf powder, 26% of soybean meal, 32.7% of corn flour, 2.5% of citric acid, 0.4-1.0% of sorbic acid, 0.5-1.0% of gallic acid, 0.4-1.0% of VC, 0.5-1.0% of VB group mixture and 3.0% of inorganic salt mixture.
The second aspect of the present invention provides an artificial feed adapted silkworm variety.
The invention has the beneficial effects that:
(1) the method has wide adaptability, and most of silkworm varieties popularized in production can adopt the method to perform artificial feed ingestion selection, so that the ingestion of artificial feeds of two mating strains can be obviously improved, and the ingestion of hybrids is improved. The 'R pinus sylvestris' strain obtained by breeding the silkworm variety 'pinus sylvestris' of the Chinese system has the advantages that the feeding performance reaches the feeding performance standard of artificial feed breeding of silkworms, other economic characters are the same as the pinus sylvestris, the strain does not need to be re-established during breeding, and the breeding efficiency is high.
(2) The method is used for breeding 2-3 times every year, and the breeding of the variety and strain of the artificial feed feeding silkworm can be completed within 4-5 years. The selection of cocoon silk character, vitality and oviposition performance is carried out after feeding selection, the original excellent characters of the cultivated silkworm variety are ensured, and the cultivated variety is suitable for the modern high-efficiency silkworm production mode of artificial feed cultivation of young silkworms, mulberry leaf cultivation of large silkworms or full-age artificial feed cultivation.
(3) The artificial feed for the silkworm variety bred by the method disclosed by the invention is good in feeding property, and good in feeding property for the feed with low mulberry leaf powder content.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
As introduced in the background section, the current artificial feed silkworm breeding technology in China has low popularization rate in production because of the lack of artificial feed adaptability silkworm varieties. The prior artificial feed has poor selection effect on adaptive silkworm varieties, low breeding efficiency and lack of artificial feed ingestion silkworm varieties. The cultivation of the traditional artificial feed adaptive variety of the silkworms requires at least 6 to 10 years, and the selected combination cannot be approved finally.
Based on the above, the invention aims to provide a breeding method which can rapidly improve the feeding property of the silkworms to artificial feed, and has good cocoon silk character and silkworm egg laying attachment and high breeding efficiency. The invention mainly aims to select the feeding property of the current variety, select individuals with good adaptability to different feeds, and select indexes of the selection method, such as the height of the hair thinning rate, the silkworm raising rate and the development uniformity, the development duration and the individual quality. The feeding performance is improved, the growth and development of larvae, the silk character and the oviposition performance are selected, and the hybrid combination mode is not changed, so that the excellent characters of the current variety are continuously maintained. During the artificial feed breeding period of 1-2 years of each generation, the artificial feed breeding is carried out according to the artificial feed breeding standard of young silkworms, breeding is carried out according to breeding needs at 3-4 years of age, and breeding is carried out according to the mulberry leaf breeding standard at 5-5 years of age. Breeding for 2-3 generations every year, wherein the temperature in spring is proper, the leaf quality is good, the quantitative property of cocoon silk is fully exerted, and the selection of cocoon quality is emphasized on the basis of feeding selection; high temperature, dampness and poor leaf quality in summer and autumn, and the selection of robustness is emphasized on the basis of the selection of ingestion.
In one embodiment of the invention, the breeding method comprises the steps of:
step one, selecting and breeding by taking a China system and a Japanese system of the current excellent silkworm variety as materials, and carrying out adaptive selection for 3 times by using 3 feeds for silkworms of each generation. Firstly, collecting ants with artificial feed with low mulberry leaf powder content and high soybean powder content; changing the breeding into common artificial feed after feeding for 24-48 hours, changing the breeding into mulberry leaf breeding without stopping feeding until silkworms of 3 or 4 years old are started; after the 4 th or 5 th silkworm comes out, selecting silkworms with rapid development and large individual mass to continue feeding until cocooning;
step two, hybridizing the Chinese system and the Japanese system which have excellent food intake performance and economic characters of the artificial feed obtained in the step one to obtain hybrid, namely, the artificial feed adaptive silkworm variety with excellent economic characters;
further, the artificial feed for the termite harvesting is M10 pellet artificial feed, and comprises the following raw materials in parts by weight: 10% of mulberry leaf powder, 32% of soybean meal, 54% of corn flour, 2.5% of citric acid, 0.4-1.0% of sorbic acid, 0.4-1.0% of VC and 0.1% of florfenicol;
the common artificial feed is M33 pellet artificial feed, and comprises the following raw materials in parts by weight: 33% of mulberry leaf powder, 26% of soybean meal, 32.7% of corn flour, 2.5% of citric acid, 0.4-1.0% of sorbic acid, 0.5-1.0% of gallic acid, 0.4-1.0% of VC, 0.5-1.0% of VB group mixture and 3.0% of inorganic salt mixture;
the third feed is mulberry leaves.
Further, the breeding method of the silkworm variety comprises the steps of selecting and reserving a moth area or an individual with high hair thinning rate, high silkworm raising rate, regular development, short development process and large individual mass, and breeding the moth area or the individual to a cocooning.
Furthermore, the breeding method is divided into two stages, about the first 5 generations (according to the feeding property of breeding materials for artificial feed), moth areas are adopted for mixed breeding, and individuals with fast development and large quality are selected for subculture.
Further, single moth breeding is adopted after the moth area mixed breeding selection is finished. Selecting 6-7 moth areas with the best feeding performance and the highest development uniformity from more than 20 moth areas of each variety of the termites, and selecting 60-100 silkworms with the fastest development and large individual mass for raising to cocoons from the moth areas. The seeds are bred with the moth areas, and each moth area breeds more than 20 moth areas. And repeating the method combining the moth area selection and the individual selection in subsequent generations for selection.
Further, in the single moth breeding stage, the selection of properties such as cocoon shape, wrinkle shrinkage, evenness and the like is carried out while the feeding selection is carried out, and then the selection of the whole cocoon volume and the cocoon layer rate of an individual is carried out. The whole cocoon content is controlled within the range of plus or minus 1 standard deviation of the mean value of the moth area, and the cocoon layer rate is controlled above the mean value of the moth area.
Further, in the single moth breeding stage, a moth region for reserving seeds is selected, and a moth region with few bad eggs, medium and large egg laying amount, good egg laying, green transferring and hatching is selected for breeding.
Furthermore, the breeding season of the silkworm variety is mainly cocoon silk selection in the spring stage and is mainly robustness selection in the summer stage and the autumn stage.
In order to make the technical solutions of the present application more clearly understood by those skilled in the art, the technical solutions of the present application will be described in detail below with reference to specific embodiments. If the experimental conditions not specified in the examples are specified, the conditions are generally conventional or recommended by the reagent company; reagents, consumables, and the like used in the following examples are commercially available unless otherwise specified.
Example 1:
the pinus sylvestris A and the pinus sylvestris B which have excellent comprehensive properties and are popularized and applied in large area in production are taken as breeding materials and are assembled into the pinus sylvestris A multiplied by the pinus sylvestris B in 2007 and are marked as S1And in the generation, mixed breeding is carried out in a moth area from the spring silkworm stage of 2008, ants are harvested by using M10 pellet artificial feed, the breeding is changed into M33 pellet artificial feed for breeding after 24 hours, and the breeding is changed into mulberry leaf breeding after 3 years to cocoon. The whole generation adopts non-stop feeding, timely eliminates the silkworm with slow development and small quality, after cocoons are formed, the cocoons are roughly selected according to cocoon shapes, crimples and cocoon layer thicknesses, and are mated and reserved. S2～S5The generation processing method is the same as S1。
Stage of single moth rearing (S)6Then) moth zone selection is performed. First of all byThe granular artificial feed of M10 is used for collecting more than 20 moths of ants, and the fluffing rate is investigated after the ants are collected for 24 hours; after 2-year-old silkworms come, the silkworms are changed into M33 artificial feed for feeding; and after 3 or 4 years old, the silkworms are transferred to mulberry leaves for breeding, 6-7 moth areas with the best feeding performance and the highest development uniformity are selected, individuals with the fastest development and large weight are selected from the moth areas, and 60-100 silkworms are selected from each moth area and are raised to cocoons without eating. After cocoons are cocoons for 7-8 days, selecting silkworm cocoons with normal cocoon shapes, medium shrinkage wrinkles and white cocoon colors for cocoon quality investigation, and selecting individuals with the whole cocoon weight within the range of +/-1 standard deviation of the average value of the investigation population and the cocoon layer rate above the average value for reserving seeds. Mating with moth areas is carried out during seed production, and more than 20 moth areas are produced in each moth area. After the moths are dissolved, the silkworm moths with clean body color, full wing extension, regular scale hair and active actions are continuously selected for mating. In the egg period, moth areas with consistent egg color, uniform egg laying, less bad eggs, moderate and more eggs and uniform turning green and hatching are selected. Through the selection of more than 12 generations, the feeding performance of the silkworms reaches the practical level, and the 'R pinus cyanine' is obtained.
The ingestion and main economic characters of the artificial feed in each generation are shown in table 1.
TABLE 1 feeding System Performance of silkworm strain "R.Melongena" on artificial feed
The pedigree performance of the main character breeding of each generation of the R pinus cyanine is shown in the table 2.
TABLE 2 pedigree of the major trait breeding of each generation of "R.Cyanini pine
As can be seen from tables 1 and 2, the breeding was carried out until the 6 th generation (i.e., S)6) The indexes of various characters of the silkworm are better,however, the feeding ability is influenced by many factors, and the feeding ability selection is effective, but the selection is not stable in the previous generation of selection, and the number of selection generations must be increased in order to ensure stable inheritance of the feeding ability trait. In addition, the improvement of the ingestion may cause the reduction of other economic traits, and it is necessary to continue selection for the improvement of other traits. After the strain is selected for more than 20 generations, the economic character of the strain is found to be stable after 12 generations. Thus, the number of generations of choice for the present invention is at least 12.
The middle line stock variety "R cyanine pine" bred by the embodiment has the following characters:
a Chinese system, namely a two-chemical quadralmitate hybrid fixed seed, namely pinus sylvestris A multiplied by pinus sylvestris B, belongs to an artificial feed adaptive new strain, and is bred by artificial feed with the mulberry leaf powder content of 33% at 1-2 ages, the silkworm raising rate of 96-hour 2 ages is 95.1%, the silkworm raising rate of 192-hour 3 ages is 93.2%, and various characters are stable. The overyear egg is grey, oval and elliptical, and the egg shell is mostly milky white and a little yellowish. The newly-hatched silkworms are black brown, have lively actions, have about 2200 heads per termite, have dissipation performance in young silkworms, are fast in sleep period at each age and are uniform in dormancy. The strong silkworm is bluish white, has a thick body and is vegetarian; white cocoon, short oval, fine crinkle; the body color of the pupa is light yellow, the body color of the moth is white gray, and the compound eye is black. The mulberry leaves are not stepped on, the larva has vigorous body, fast development and short larva period, the 5 th instar is about 6d 5h, the full instar is about 21d 10h, the hibernating period is about 16d 15h, and the mature silkworms are gushed. The total cocoon weight and the cocoon shell weight are slightly higher than those of a contrast variety of pinus betulaefolia, and the cocoon shell rate is about 24.5%. The single moth has the advantages of high moth breeding rate, good mating performance, about 620 eggs laying amount of a single moth and about 1780 eggs per gram. The male moth has slightly poor cold storage resistance and weak secondary crossing performance.
Example 2:
the "R pinus cyanine" obtained in example 1 and the obtained japanese intercross stock "R moon" selected by the same method are hybridized (the "R pinus cyanine" is an orthogonal stock when the female parent is used, and the "R moon" is a reciprocal stock when the female parent is used), and the prepared "R pinus cyanine × R moon" is an artificial feed-adapted silkworm variety with excellent economic traits.
The basic characters and characteristics of the first generation hybrid species 'R cyanine pine × R gosue':
the R pinus sylvestris multiplied by R moon is a Japanese four-dormancy artificial feed adaptive silkworm variety, a Chinese multiplied by day hybrid variety is bred, the artificial feed with the mulberry leaf powder content of 33% is bred at 1-2 ages, the silkworm rate of 96.2% at 2 ages at 96 hours and 93.3% at 3 ages at 192 hours. The cross-hatching of the overyear eggs is grey, the cross-hatching of the overyear eggs is elliptical, the egg shells are milk white, the number of eggs per gram is about 1780, and the cross-hatching is about 1800. The hatching of the Ant silks is uniform, the body color of the Ant silks is black brown, the actions are lively, the number of the head of each orthotropic Ant is about 2100, and the number of the head of each inverse cross is about 2150. The young silkworm with positive and negative cross has dissipation property, and the young silkworm with positive and negative cross can sleep uniformly at each age. The positive and negative cross of the strong silkworm is bluish white, the body is common, big and durable, and the common stripe is formed; white cocoon, oblong shape with both forward and reverse cross, medium crinkling; the pupa body is light yellow, the moth body is white and female moth is white, the male moth is gray white, and the compound eye is black. The positive and negative cross larva eats mulberry vigorously without leaves, has strong physique, fast development and short larva period, and can sleep uniformly and age uniformly.
Growth and development conditions of R cyanine pine and R moon and cocoon quality:
the results of the investigation of growth and development of the R cyanine pines × R Haoyue and cocoon quality are shown in Table 3 (basically all the investigation indexes of the R cyanine pines × R Haoyue are used in the control species).
TABLE 3 investigation results of growth and development of 3-5-year mulberry leaf bred with 1-2-year old granular feed of Pinus cyanine by R Haoyue and cocoon silk quality
Note: the growth and development conditions are investigated by Shandong agriculture university, and the cocoon silk quality performance is identified by reeling silk by the fiber inspection institute of technical supervision agency in Taian city.
The R Jingsong is multiplied by R Haoyue is a special type silkworm variety bred by aiming at artificial feed, artificial feed breeding of young silkworms and large silkworm mulberry leaves is advocated during breeding in production, full-age artificial feed breeding can also be carried out, the advantage of the variety can be better shown by utilizing low-cost artificial feed breeding with low mulberry leaf powder content, the breeding performance of the variety is obviously better than that of the Jingsong is multiplied by Haoyue, and the full-age development process is about 1d shorter than that of the Jingsong is multiplied by Haoyue.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (1)
1. A breeding method of artificial feed adaptive silkworm varieties is characterized by comprising the following steps:
(1) selecting and breeding by taking the China systemic silkworm of the current silkworm variety as a material: the method comprises the following steps of carrying out adaptive selection on silkworms of each generation for 3 times by using 3 feeds, carrying out individual selection on the silkworms in the first 5 generations by adopting moth area mixed breeding, carrying out single moth breeding after the 5 th generation, carrying out breeding by adopting a method combining the moth area and the individual selection, and continuously selecting more than 12 generations every year to obtain a Chinese system of the artificial feed adaptive silkworms; the silkworm variety of the Chinese system is Pinus sylvestris A or Pinus sylvestris B; the method for breeding the single moths comprises the following steps: selecting 6-7 moth areas from the former generation silkworm moth-collecting area above 20 moth areas according to ingestion and development uniformity, and selecting 60-100 silkworms from the former generation silkworm moth-collecting area to breed to cocoons according to development speed and individual mass; mating with moth areas during seed production, wherein each moth area produces over 20 moth areas; each generation of silkworms used 3 feeds: collecting ants with artificial feed M10, feeding for 24-48 hr, changing into artificial feed M33, feeding silkworms to 3 or 4 years old without stopping feeding, changing into mulberry leaf breeding, and feeding to cocoons without stopping feeding; and breeding spring, summer and autumn 3 generations each year: selecting and breeding mainly based on cocoon silk selection in spring silkworm period and on ingestion, and selecting and breeding mainly based on robustness selection in summer silkworm period and autumn silkworm period; the artificial feed M10 comprises the following raw materials in parts by weight: 10% of mulberry leaf powder, 32% of soybean meal, 54% of corn flour, 2.5% of citric acid, 0.4-1.0% of sorbic acid, 0.4-1.0% of Vc and 0.1% of florfenicol; the individual selection of the mixed breeding of the moth areas is selected according to the hair thinning rate, the silkworm raising rate, the development uniformity, the development process length and the individual quality; the single moth breeding is carried out through the selection of the hair thinning rate, the silkworm raising rate, the growth uniformity, the growth passing length and the individual quality, the selection of cocoon shapes, crimples and uniformity is carried out at the same time, and then the selection of the whole cocoon volume and the cocoon layer rate of the individual is carried out;
(2) selecting and breeding by taking Japanese systematic silkworms of the current silkworm variety as materials: carrying out 3 times of artificial adaptive selection on silkworms of each generation by using 3 feeds, carrying out individual selection on the silkworms in the former 5 generations by adopting moth area mixed breeding, carrying out single moth breeding after the 5 th generation, carrying out breeding by adopting a method combining the moth area and the individual selection, and continuously selecting more than 12 generations every year to obtain a Japanese system of the artificial feed adaptive silkworms; the silkworm variety of the japanese system is moon a or moon B; the method for breeding the single moths comprises the following steps: selecting 6-7 moth areas from the former generation silkworm moth-collecting area above 20 moth areas according to ingestion and development uniformity, and selecting 60-100 silkworms from the former generation silkworm moth-collecting area to breed to cocoons according to development speed and individual mass; mating with moth areas during seed production, wherein each moth area produces over 20 moth areas; each generation of silkworms used 3 feeds: collecting ants with artificial feed M10, feeding for 24-48 hr, changing into artificial feed M33, feeding silkworms to 3 or 4 years old without stopping feeding, changing into mulberry leaf breeding, and feeding to cocoons without stopping feeding; the artificial feed M33 comprises the following raw materials in parts by weight: 33% of mulberry leaf powder, 26% of soybean meal, 32.7% of corn flour, 2.5% of citric acid, 0.4-1.0% of sorbic acid, 0.5-1.0% of gallic acid, 0.4-1.0% of Vc, 0.5-1.0% of VB group mixture and 3.0% of inorganic salt mixture; the individual selection of the mixed breeding of the moth areas is selected according to the hair thinning rate, the silkworm raising rate, the development uniformity, the development process length and the individual quality; the single moth breeding is carried out through the selection of the hair thinning rate, the silkworm raising rate, the growth uniformity, the growth passing length and the individual quality, the selection of cocoon shapes, crimples and uniformity is carried out at the same time, and then the selection of the whole cocoon volume and the cocoon layer rate of the individual is carried out;
(3) and (3) hybridizing the Chinese system of the artificial feed adaptive silkworm bred in the step (1) with the Japanese system of the artificial feed adaptive silkworm bred in the step (2), and obtaining a hybrid, namely the artificial feed adaptive silkworm variety.
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