CN117598245A - Cultivation method of special strain of pink shell layer chicken - Google Patents
Cultivation method of special strain of pink shell layer chicken Download PDFInfo
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- CN117598245A CN117598245A CN202410003310.2A CN202410003310A CN117598245A CN 117598245 A CN117598245 A CN 117598245A CN 202410003310 A CN202410003310 A CN 202410003310A CN 117598245 A CN117598245 A CN 117598245A
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- 241000287828 Gallus gallus Species 0.000 title claims abstract description 34
- 238000012364 cultivation method Methods 0.000 title abstract description 7
- 210000003278 egg shell Anatomy 0.000 claims abstract description 98
- 102000002322 Egg Proteins Human genes 0.000 claims abstract description 90
- 108010000912 Egg Proteins Proteins 0.000 claims abstract description 90
- 210000003746 feather Anatomy 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 21
- 230000009027 insemination Effects 0.000 claims abstract description 14
- 235000013601 eggs Nutrition 0.000 claims description 5
- 239000008280 blood Substances 0.000 claims description 3
- 210000004369 blood Anatomy 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 230000012447 hatching Effects 0.000 claims description 2
- 238000009395 breeding Methods 0.000 abstract description 17
- 230000001488 breeding effect Effects 0.000 abstract description 16
- 244000144977 poultry Species 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 8
- 244000144987 brood Species 0.000 description 4
- 238000009396 hybridization Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000036750 egg laying performance Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- HVYLDJKDVOOTHV-UHFFFAOYSA-N acetic acid;2-iminoethanethiol Chemical compound CC(O)=O.CC(O)=O.SCC=N HVYLDJKDVOOTHV-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
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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
- A01K67/02—Breeding vertebrates
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- Y—GENERAL 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
- Y02P60/87—Re-use of by-products of food processing for fodder production
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Abstract
The invention provides a cultivation method of a special strain of pink shell layer chicken, which belongs to the technical field of poultry breeding and comprises the following steps: s1, selecting a high-yield fast-feather Luo island white cock and a high-yield slow-feather Bai Laihang hen, and producing a hybrid F1 generation according to the insemination of a family; s2, selecting a slow feather heterozygous cock with an eggshell color L value of 77-80 at 43 weeks of the full-bred hens in the F1 generation and a fast feather hen with an eggshell color L value of 77-80 at 43 weeks of the full-bred hens to cross so as to obtain the F2 generation; s3, selecting a fast-feather homozygous cock with the color L value of a 43-week-old eggshell of the isotactic hen in the F2 generation and a fast-feather hen with the color L value of a 43-week-old eggshell of 77-80, constructing a basic group of a powder-shell fast-feather laying hen strain, and crossing, wherein laying hens in offspring produced according to family insemination are target powder-shell laying hens. The special strain eggshell color of the powder-shell fast-feather and powder-shell slow-feather laying hens cultivated by the method meets the strain cultivation target, and the eggshell color uniformity is highest.
Description
Technical Field
The invention relates to matched breeding of new varieties of laying hens, in particular to a method for breeding a special strain of pink shell layer chicken, and belongs to the technical field of poultry breeding.
Background
The Chinese region is wide, and the requirements of different regions on the weight, the eggshell color, the egg weight and the like of the eliminated chicken of the laying hen have great difference. In recent years, the diversified development trend of the egg consumer market in China is obvious, and the demand of the market for red-powder eggs is further improved.
The specialized strain of the laying hen is the basis for variety cultivation, and the cultivation of the red-pink eggshell laying hen mating line is required to be formed by hybridization and mating of the brown-shell laying hen strain and the pink-shell laying hen strain. At present, the breeding materials of the pink shell layer chicken mainly come from local varieties, and the egg laying performance is relatively low. In order to cultivate a new complete set of high-yield red-pink eggshell layer chicken, the existing high-yield brown-shell layer chicken strain and the high-yield white-shell layer chicken strain are required to be hybridized, and the special strain of the pink-shell layer chicken is produced, so that the variety cultivation process is further accelerated. Therefore, the creation of the special strain of the pink shell layer chicken has very important significance for further meeting the market demand of the red shell layer chicken.
Disclosure of Invention
Aiming at the problems, the invention provides a cultivation method of a special strain of the pink shell layer chicken, which solves the technical problems of low egg laying performance and slow variety cultivation process of the existing pink shell layer chicken.
In order to achieve the purpose, the technical scheme of the cultivation method of the special strain of the pink shell layer chicken is as follows: the method comprises the following steps:
s1, selecting a high-yield fast-feather Luo island white cock and a high-yield slow-feather Bai Laihang hen, and producing a hybrid F1 generation according to the insemination of a family; the selection condition of the high-yield fast-feather Luo island white cock is a cock with the color L value of the eggshell of the same hen at the age of 43 weeks being 60-64, and the selection condition of the high-yield slow-feather Bai Laihang hen is a hen with the color L value of the eggshell of the same hen at the age of 43 weeks being 95-97;
s2, selecting a slow feather heterozygous cock with an eggshell color L value of 77-80 at 43 weeks of the full-bred hens in the F1 generation and a fast feather hen with an eggshell color L value of 77-80 at 43 weeks of the full-bred hens to cross so as to obtain the F2 generation;
s3, selecting a fast-feather homozygous cock with the color L value of a 43-week-old eggshell of the isotactic hen in the F2 generation and a fast-feather hen with the color L value of a 43-week-old eggshell of 77-80, constructing a basic group of a powder-shell fast-feather laying hen strain, and crossing, wherein laying hens in offspring produced according to family insemination are target powder-shell laying hens.
Further, the F2 generation further comprises a slow-feather heterozygous cock and a slow-feather hen, and the slow-feather heterozygous cock with the color L value of an eggshell of 77-80 at 43 weeks of the isotactic hen in the F2 generation is selected to cross with the slow-feather hen with the color L value of 77-80 at 43 weeks of the egg shell to obtain the F3 generation; and (3) selecting a slow-feather homozygous cock with an eggshell color L value of 77-80 at 43 weeks of the isotactic hen in the F3 generation and a slow-feather hen with an eggshell color L value of 77-80 at 43 weeks of the isotactic hen, constructing a basic group of the powder-shelled slow-feather laying hen strain, and intersecting the basic group, wherein laying hens in offspring produced by insemination according to families are target powder-shelled laying hens.
Further, in step S1, the male-female ratio 1 is as follows: 10.
Further, in the step S2, the male-female ratio is 1:10.
further, the male-female ratio in the intersecting step S3 is 1:10.
further, the male-female ratio of the selected F2 generation is 1 when the cross is carried out: 10.
further, the selection of the slow feather homozygous cock in the F3 generation is carried out by the following steps: and when F3 is used for hatching, selecting and keeping all healthy hatchlings, collecting blood of all the hatchlings at 5 weeks of age, extracting DNA, and selecting and keeping slow feather homozygous cock according to a molecular detection result.
Further, the eggshell color L value of the eggs laid by the target pink shell layer chicken is 76-80.
The cultivation method of the special strain of the pink shell layer chicken has the beneficial effects that:
the invention creates a special strain of the pink shell layer chicken by crossing the existing high-yield Luo island white cock and high-yield white aviation hen. The invention has three advantages: on one hand, the optimal range of the color L value of the eggshell of 43 weeks old is limited for selection, so that the color uniformity of the eggshell of 43 weeks old of the cultivated special new line of the pink shell layer chicken is high, and the problem of low color uniformity of the eggshell of the traditional breeding method is solved; on the other hand, the same hybridization group can simultaneously produce two types of novel strains of the pink shell layer chicken with fast and slow feathers, thereby greatly improving the breeding efficiency; in addition, the breeding material types of the laying hens are further enriched, and a foundation is laid for the cultivation of a new corollary line of the red-pink eggshell laying hens.
Detailed Description
The following description of the technical solution in the embodiments of the present invention is clear and complete. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
A cultivation method of a special strain of pink shell layer chicken utilizes the existing high-yield fast-feather Luo island white strain and high-yield slow-feather Bai Laihang strain to carry out hybridization and line establishment, and creates the special strain of pink shell layer chicken. The method comprises the following specific steps:
(1) The method comprises the steps of taking the existing high-yield fast-feather Luo island white cock and high-yield slow-feather Bai Laihang hen as breeding materials, screening fast-feather Luo island white cock with the color L value of 60-64 of 43 week old eggshells of the isotactic hen and slow-feather Bai Laihang hen with the color L value of 95-97 of 43 week old eggshells of the isotactic hen according to the sequence from big to small, and producing hybrid F1 generation according to the family insemination. Wherein the eggshell color L is measured by a spectrocolorimeter (model CM-700D, manufactured by Konikoku Meida, japan), and the same applies.
(2) And selecting a slow feather heterozygous cock with the color L value of an eggshell of 77-80 at 43 weeks of age of an isotactic hen in the F1 generation and a fast feather hen with the color L value of 77-80 at 43 weeks of age to cross, wherein the variation coefficient of the color L value of the eggshell of the 43 weeks of age of the produced F2 generation is minimum.
(3) The fast-feather homozygous cock and the slow-feather heterozygous cock appear in the F2 generation at the same time, and the fast-feather hen and the slow-feather hen are respectively screened out to form a combination 1 (the fast-feather homozygous cock and the fast-feather hen) and a combination 2 (the slow-feather heterozygous cock and the slow-feather hen). For F2 generation combination 1, selecting a fast-feather homozygous cock with an egg shell color L value of 77-80 at 43 weeks of age of an isotactic hen in F2 generation and a fast-feather hen with an egg shell color L value of 77-80 at 43 weeks of age to form a basic group of the powder-shelled fast-feather laying hen strain, wherein the variation coefficient of the egg shell color L value of 43 weeks of the produced offspring is minimum. According to the scheme, the breeding is continuously carried out, the eggshell color of the cultivated powder-shell fast-feather laying hen strain accords with the strain cultivation target, and the eggshell color uniformity is highest.
(4) For F2 generation combination 2, selecting a slow feather heterozygous cock with the color L value of an egg shell of 77-80 at 43 weeks of an isotactic hen in F2 generation and a slow feather hen with the color L value of 77-80 at 43 weeks of an egg shell to cross, wherein the variation coefficient of the color L value of the egg shell of 43 weeks of the produced F3 generation is minimum.
(5) The F3 generation is simultaneously provided with a slow-feather homozygous cock and a slow-feather heterozygous cock, and a fast-feather hen and a slow-feather hen. Selecting slow-feather homozygous cock with the color L value of the egg shell of 43 weeks old of the isotactic hen in F3 generation and slow-feather hen with the color L value of the egg shell of 43 weeks old of 77-80 to form a basic group of the powder-shell slow-feather laying hen strain, wherein the variation coefficient of the color L value of the egg shell of 43 weeks old of the produced offspring is minimum. According to the scheme, the breeding is continuously carried out, the eggshell color of the bred powder-shell slow-feather laying hen strain meets the strain breeding target, and the eggshell color uniformity is highest.
Example 1
Cultivation of special strain of powder-shell fast-feather and powder-shell slow-feather laying hens
In order to meet the cultivation requirement of a new complete set of red-powder eggshell laying hens, the existing cultivated eggshell is light pink (the eggshell color L value is 76-80), and the eggshell color is uniform, so that the special line of the powder-shell fast-feather and powder-shell slow-feather laying hens is provided.
(1) The method comprises the steps of taking the existing high-yield fast-feather Luo island white cock and high-yield slow-feather Bai Laihang hen as breeding materials, respectively screening fast-feather Luo island white cock with the color L value of 60-64 of 43 week old eggshell of the isotactic hen and slow-feather Bai Laihang hen with the color L value of 95-97 of 43 week old eggshell of the isotactic hen according to the sequence from big to small, and mixing according to the male-female ratio 1: and 10, hybridizing the high-yield fast-feather Luo island white selected cock with the high-yield slow-feather Bai Laihang selected hen to form a matched hybrid, and producing the F1 generation according to the insemination of the family.
Table 1 comparison of Eggshell color L values at 43 weeks of age
Note that: the same column of data shoulder marks with different capital letters indicate significant differences (P < 0.05), and the same capital letters indicate insignificant differences (P > 0.05).
(2) The cock of F1 generation is heterozygous with slow feather, and the hen is quick feather. The color L value of the egg shell of the hen of the F1 generation at the age of 43 weeks is 74-92, and the hen of the F1 generation is divided into 6 groups which are respectively named as groups A1, B1, C1, D1, E1 and F1 according to the sequence from small to large; the F1-generation roosters with the color L values of the eggshells of 43 weeks of the isotactic hens being 74-92 were selected, and the F1-generation roosters were divided into groups A1, B1, C1, D1, E1 and F1 in the same grouping manner (the range of the color L values of the eggshells of 43 weeks corresponding to the isotactic hens of the same group designation and the roosters is the same, the following). According to the mixture ratio of the male and female materials 1: and 10, crossing the slow-feather heterozygous cock and the fast-feather hen of the same group, and producing the F2 generation according to the insemination of the family.
As can be seen from Table 2, the average value of the color L of the eggshell of 43 weeks of age of the F2 generation produced by group B1 in the F1 generation is 78.42, which is significantly higher than that of group A1 (P < 0.05), significantly lower than that of groups C1, D1, E1 and F1 (P < 0.05), and the coefficient of variation is relatively minimal. The method is characterized in that a slow-feather heterozygous cock with the color L value of an eggshell of 77-80 at 43 weeks of an isotactic hen in the F1 generation and a fast-feather hen with the color L value of 77-80 at 43 weeks of an eggshell are selected for crossing, and the produced eggshell with the color L value of 43 weeks of the F2 generation has the minimum variation coefficient and the highest eggshell color uniformity.
Table 2 comparison of Cross results for different groups of F1
(3) The F2 generation is simultaneously provided with a fast-feather homozygous cock and a slow-feather heterozygous cock, a fast-feather hen and a slow-feather hen, and a combination 1 (the fast-feather homozygous cock and the fast-feather hen) and a combination 2 (the slow-feather heterozygous cock and the slow-feather hen) are respectively screened out.
(4) For the F2 generation combination 1, quick-feather hens with the eggshell color L value of 74-92 at the age of 43 weeks are selected, and the F2 generation combination 1 hens are divided into 6 groups which are named as groups A2, B2, C2, D2, E2 and F2 respectively according to the sequence from small to large; quick-feather homozygous cocks with an eggshell color L value of 74-92 at 43 weeks of age of the isotactic hens were selected, and the F2-generation group 1 cocks were grouped into groups A2, B2, C2, D2, E2 and F2 in the same grouping. According to the mixture ratio of the male and female materials 1: and 10, crossing the same group of fast-feather homozygous cocks with the fast-feather hens, and producing offspring according to the insemination of families.
As can be seen from Table 3, the average value of the color L of the eggshell of the 43-week-old offspring produced from group B2 of the F2 generation combination 1 is 78.63, which is significantly higher than that of group A2 (P < 0.05), significantly lower than that of groups C2, D2, E2 and F2 (P < 0.05), and the coefficient of variation thereof is relatively minimal. The color of the egg shell of the post-production generation of the F2 generation combination 1 group B2 meets the strain cultivation target, and the uniformity is highest. Therefore, healthy fast-feather homozygous cocks with the color L value of the eggshell of 77-80 at 43 weeks of the isotactic hens in the F2 generation combination 1 and healthy fast-feather hens with the color L value of 77-80 at 43 weeks of the eggshell are selected, and constructing a foundation group of the specialized strain of the powder-shell fast-feather laying hens. According to the scheme, the breeding is continuously carried out, the eggshell color of the special strain of the cultivated powder-shell fast-feather laying hen accords with the strain cultivation target, and the eggshell color uniformity is highest.
Table 3 comparison of Cross results for different groups of F2 generation combinations 1
(5) For the F2 generation combination 2, selecting slow feather hens with the eggshell color L value of 74-92 at the age of 43 weeks, and dividing the F2 generation combination 2 hens into 6 groups which are named as groups A3, B3, C3, D3, E3 and F3 respectively according to the sequence from small to large; slow feather heterozygous hens with an eggshell color L value of 74-92 at 43 weeks of age of the isotactic hens were selected and the F2-generation group 2 hens were grouped into groups A3, B3, C3, D3, E3 and F3 in the same grouping. According to the mixture ratio of the male and female materials 1: and 10, crossing the slow-feather hybrid cock of the same group with the slow-feather hen, and producing the F3 generation according to the insemination of the family.
The F3 generation is simultaneously provided with a slow-feather homozygous cock and a slow-feather heterozygous cock, and a fast-feather hen and a slow-feather hen. Selecting and reserving all healthy broods and slow-feather broods when the broods are hatched, collecting blood of all the broods at the age of 5 weeks, extracting DNA, and selecting and reserving slow-feather homozygous cock according to a molecular detection result; the specific method for identifying the genotype of the cock can refer to the method for identifying the genotype of the fast and slow feather of the patent CN 103509874A-chicken and the method for identifying the male and female of the chick.
As can be seen from Table 4, the average value of the color L of the eggshell of the 43-week-old offspring produced by the F2 generation combination 2 group B3 is 78.74, which is significantly higher than that of the group A3 (P < 0.05), significantly lower than that of the C3, D3, E3 and F4 groups (P < 0.05), and the coefficient of variation thereof is relatively minimal. The method is characterized in that a slow feather heterozygous cock with the eggshell color L value of 77-80 at 43 weeks of the isotactic hen in the F2 generation combination 2 and a slow feather hen with the eggshell color L value of 77-80 at 43 weeks of the isotactic hen are selected to cross, the variation coefficient of the eggshell color L value of the produced F3 generation at 43 weeks of the egg shell is minimum, and the eggshell color uniformity is highest.
Table 4 comparison of Cross results for different groups of F2 generation combinations 2
(6) Selecting slow-feather hens with the eggshell color L value of 74-92 at 43 weeks in the F3 generation, and dividing the F3 generation slow-feather hens into 6 groups which are respectively named as groups A4, B4, C4, D4, E4 and F4 according to the sequence from small to large; slow-feather homozygous cocks with an eggshell color L value of 74-92 at 43 weeks of age of the isotactic hens were selected and the F3-generation cocks were grouped into groups A4, B4, C4, D4, E4 and F4 in the same grouping. According to the mixture ratio of the male and female materials 1: and 10, crossing the slow-feather homozygous cocks of the same group with the slow-feather hens, and producing offspring according to the insemination of families.
As can be seen from Table 5, the average value of the color L of the eggshell of the 43-week-old offspring produced in group B4 of F3 was 78.53, which was significantly higher than that of group A4 (P < 0.05), significantly lower than that of groups C4, D4, E4 and F4 (P < 0.05), and the coefficient of variation was relatively minimal. The color of the egg shell of the post-production generation of the F3 generation group B4 accords with the strain cultivation target, and the color uniformity of the laying hen is highest. Therefore, healthy slow-feather homozygous cocks with the color L value of the egg shell of the isotactic hens at the age of 43 weeks of F3 generation being 77-80 and healthy slow-feather hens with the color L value of the egg shell of 43 weeks being 77-80 are selected to form a special strain basic group of the powder-shell slow-feather laying hens. According to the scheme, the breeding is continuously carried out, the eggshell color of the special strain of the cultivated powder-shell slow-feather laying hen accords with the strain cultivation target, and the eggshell color uniformity is highest.
Table 5 comparison of Cross results for different groups of F3
In conclusion, for the high-yield fast-feather Luo island white cock and the high-yield slow-feather white and aviation hen, fast-feather Luo island white cock with the color L value of the 43 week-old eggshells of all-cell hens being 60-64 and slow-feather Bai Laihang hen with the color L value of the 43 week-old eggshells being 95-97 are selected for hybridization matching, and cock with the color L value of the 43 week-old eggshells of all-cell hens being 77-80 and hen with the color L value of the 43 week-old eggshells being 77-80 are selected for transverse crossing in the F1 generation, the F2 generation and the F3 generation, so that the foundation group of the special strain of the powder-shell fast-feather and powder-shell slow-feather laying hen is completed. According to the scheme, the breeding is continuously carried out, the eggshell color of the special strain of the powder-shell fast-feather and powder-shell slow-feather laying hens accords with the strain breeding target, and the eggshell color uniformity is highest.
It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Claims (8)
1. The method for cultivating the special strain of the pink shell layer chicken is characterized by comprising the following steps of:
s1, selecting a high-yield fast-feather Luo island white cock and a high-yield slow-feather Bai Laihang hen, and producing a hybrid F1 generation according to the insemination of a family; the selection condition of the high-yield fast-feather Luo island white cock is a cock with the color L value of the eggshell of the same hen at the age of 43 weeks being 60-64, and the selection condition of the high-yield slow-feather Bai Laihang hen is a hen with the color L value of the eggshell of the same hen at the age of 43 weeks being 95-97;
s2, selecting a slow feather heterozygous cock with an eggshell color L value of 77-80 at 43 weeks of the full-bred hens in the F1 generation and a fast feather hen with an eggshell color L value of 77-80 at 43 weeks of the full-bred hens to cross so as to obtain the F2 generation;
s3, selecting a fast-feather homozygous cock with the color L value of a 43-week-old eggshell of the isotactic hen in the F2 generation and a fast-feather hen with the color L value of a 43-week-old eggshell of 77-80, constructing a basic group of a powder-shell fast-feather laying hen strain, and crossing, wherein laying hens in offspring produced according to family insemination are target powder-shell laying hens.
2. The method for cultivating the special strain of the pink shell layer chicken according to claim 1, wherein the F2 generation further comprises a slow feather heterozygous cock and a slow feather hen, and the slow feather heterozygous cock with the color L value of the 43 week old eggshell of the isotactic hen of the F2 generation being 77-80 and the slow feather hen with the color L value of the 43 week old eggshell being 77-80 are selected to cross so as to obtain the F3 generation; and (3) selecting a slow-feather homozygous cock with an eggshell color L value of 77-80 at 43 weeks of the isotactic hen in the F3 generation and a slow-feather hen with an eggshell color L value of 77-80 at 43 weeks of the isotactic hen, constructing a basic group of the powder-shelled slow-feather laying hen strain, and intersecting the basic group, wherein laying hens in offspring produced by insemination according to families are target powder-shelled laying hens.
3. The method for cultivating the special strain of the pink shell layer chicken according to claim 1, wherein in the step S1, the male-female ratio is 1:10.
4. The method for cultivating the special strain of the pink shell layer chicken according to claim 1, wherein the male-female ratio in the step S2 is 1:10.
5. the method for cultivating the special strain of the pink shell layer chicken according to claim 1, wherein the male-female ratio in the step S3 is 1:10.
6. the method for cultivating the special strain of the pink shell layer chicken according to claim 2, wherein the male-female ratio of the selected F2 generation is 1:10.
7. the method for cultivating a specialized strain of pink shell layer chicken according to claim 2 or 6, wherein the selection of the slow feather homozygous cock in the F3 generation is performed by the following steps: and when F3 is used for hatching, selecting and keeping all healthy hatchlings, collecting blood of all the hatchlings at 5 weeks of age, extracting DNA, and selecting and keeping slow feather homozygous cock according to a molecular detection result.
8. The method for cultivating a specialized strain of pink shell layer chicken according to any one of claims 1-6, wherein the eggshell color L value of the eggs laid by the target pink shell layer chicken is 76-80.
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