Rapid black-bone chicken breeding method

Abstract

The invention provides a rapid black-bone chicken breeding method, and relates to the technical field of black-bone chicken breeding. The rapid black-bone chicken breeding method comprises the following steps: selecting silky fowl with silk feather and recessive white feather as a female parent and a male parent respectively for hybridization to obtain F1 filial generation, eliminating individuals with white and gray skin in the F1 filial generation, and reserving individuals with piece feather and black skin; in the reserved filial generations, cocks with prominent precocious performance and hens with high reproductive performance are selected as F2 generation parents, and F2 filial generations are bred in a manner of avoiding inbreeding inter-family random mating; then, skin color selection is conducted on the obtained F2 filial generation, individuals with feather pieces and black skin are reserved, qualified cross parents are selected according to the weight, cross-crossing fixation is conducted, and the rapid black-bone chickens are obtained. The obtained rapid black-bone chickens are high in survival rate, strong in resistance and high in growth speed, can appear on the market when the black-bone chickens are 60 days old, and have good market prospects.

Description

Technical Field

[0001] The invention relates to the technical field of black-bone chicken breeding, in particular to a fast black-bone chicken breeding method. Background Art

[0002] Black-bone chicken, also known as black-bone chicken, is divided into white-haired black-bone, black-haired black-bone, spotted-haired black-bone, black-bone meat and bones, and white-bone black-bone. Black-bone chicken is characterized by light body, rich nutrition, and early maturity. Silky-feathered black-bone chicken is one of the ancient chicken breeds. The appearance of silky-feathered black-bone chicken is stunning, as if wearing a dress made of silk feathers, so it is named silky-feathered black-bone chicken. Silky-feathered black-bone chicken is a precious medicinal local chicken breed. It is the main raw material of "Wuji Baifeng Pill", a Chinese medicine for treating gynecological diseases. It has high economic benefits, rich nutrition, and delicious taste. However, silky-feathered black-bone chicken has the disadvantages of slow growth and weak disease resistance. Generally, it can only be put on the market after being cultivated to 120 days of age, resulting in low breeding efficiency and difficulty in adapting to the requirements of large-scale breeding of black-bone chicken. Therefore, it is necessary to develop a breeding method that accelerates the growth rate of black-bone chicken, enhances the physique and disease resistance of black-bone chicken, and egg production rate, so as to increase the fine varieties of black-bone chicken to meet people's needs. Summary of the invention

[0003] The purpose of the present invention is to provide a fast-breeding method for black-bone chickens. The fast-breeding black-bone chickens obtained by breeding solve the problems of slow growth, poor disease resistance and low egg production rate of traditional black-bone chickens.

[0004] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0005] The present invention provides a fast-breeding method for black-bone chickens, comprising the following steps:

[0006] S1. Selecting silky black-bone chicken and recessive white-feather chicken as the female parent and the male parent, respectively, to crossbreed and obtain F1 hybrid offspring;

[0007] S2. Eliminate individuals with white or gray skin from the F1 hybrid offspring, and retain individuals with black feathers and skin; select roosters with outstanding precocious performance and hens with high reproductive performance from the retained hybrid offspring as F2 parents, raise them to 280 to 320 days of age, and use random mating between families to avoid inbreeding to obtain F2 hybrid offspring;

[0008] S3. The obtained F2 hybrid offspring are then selected for skin color, and individuals with white or gray skin are eliminated, while individuals with black feathers and skin are retained; they are weighed weekly, unqualified individuals are eliminated, and qualified individuals are retained, which are the hybrid parents; after sexual maturity, the hybrid parents are cross-crossed and fixed, which is the fast-growing black chicken.

[0009] Preferably, the method for selecting the F2 generation male and female parents comprises the following steps:

[0010] (1) Weigh the chicks weekly from the time they hatch. At 8 weeks of age, select males weighing ≥1.6 kg and females weighing ≥1.2 kg for further breeding;

[0011] (2) raising the roosters and hens selected and bred in step (1) to 10 weeks of age and weighing them again, and selecting roosters and hens whose weight is 90% to 110% of the average weight;

[0012] (3) After the roosters and hens selected and bred in step (2) are cultured to 170 to 180 days of age, hens with an egg laying rate of ≥5% and roosters with a sperm motility of ≥9 are selected.

[0013] Preferably, in step (2), the breeding rate of hens is 65-70%, and the breeding rate of roosters is 1:10.

[0014] Preferably, the unqualified individuals in S3 are those whose body weight is less than 30% of the average body weight; the qualified individuals are roosters whose body weight is ≥2kg and hens whose body weight is ≥1.5kg at 60 to 63 days of age.

[0015] Preferably, the feed used in the breeding process includes the following components in weight portions: 20-30 parts of soybean meal, 40-50 parts of corn flour, 10-15 parts of fish meal, 1-5 parts of complex vitamins, and 1-5 parts of complex minerals.

[0016] Preferably, the temperature during the breeding process is 18-22° C., the air humidity is 50-60%, and the light exposure time is 10-14 h / d.

[0017] Preferably, the illumination time in summer is 12 to 14 h / d, and the illumination time in winter is 10 to 12 h / d.

[0018] Preferably, the chicks are vaccinated during the breeding process, and the vaccines include Newcastle disease vaccine, avian influenza vaccine and Marek's disease vaccine.

[0019] Preferably, disease monitoring is performed during the breeding process, and the disease monitoring is performed on blood samples and feces. The frequency of disease monitoring is 1 to 2 times per month.

[0020] By adopting the above technical scheme, the present invention has the following beneficial effects: the breeding method of the fast-breeding black-bone chicken of the present invention comprises the following steps: selecting a silky-feathered black-bone chicken and a recessive white-feathered chicken as the female parent and the male parent for hybridization, obtaining F1 hybrid offspring, eliminating individuals with white and gray skin in the F1 hybrid offspring, and retaining individuals with black feathers and skin; among the hybrid offspring retained, selecting a rooster with outstanding precocious performance and a hen with high reproductive performance as the F2 generation parents, and cultivating the F2 hybrid offspring by random mating between families avoiding inbreeding; then selecting the skin color of the obtained F2 hybrid offspring, retaining individuals with black feathers and skin, selecting qualified hybrid parents according to weight, and cross-crossing and fixing to obtain a fast-breeding black-bone chicken. The fast-breeding black-bone chicken obtained by the present invention has a fast growth rate, a high weight of the finished chicken, a high survival rate, strong resistance, and a high egg-laying rate of the hen, and has a good market prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the hybridization of the fast-breeding black-bone chicken of the present invention. DETAILED DESCRIPTION

[0022] The present invention provides a fast-breeding method for black-bone chickens, comprising the following steps:

[0023] S1. Selecting silky black-bone chicken and recessive white-feather chicken as the female parent and the male parent, respectively, to crossbreed and obtain F1 hybrid offspring;

[0024] S2. Eliminate individuals with white or gray skin from the F1 hybrid offspring, and retain individuals with black feathers and skin; select roosters with outstanding precocious performance and hens with high reproductive performance from the retained hybrid offspring as F2 parents, raise them to 280 to 320 days of age, and use random mating between families to avoid inbreeding to obtain F2 hybrid offspring;

[0025] S3. The obtained F2 hybrid offspring are then selected for skin color, and individuals with white or gray skin are eliminated, while individuals with black feathers and skin are retained; they are weighed weekly, unqualified individuals are eliminated, and qualified individuals are retained, which are the hybrid parents; the hybrid parents are fixed by cross-crossing to obtain the fast-growing black-bone chicken.

[0026] The present invention first selects silky black-bone chickens and recessive white-feathered chickens as the female parent and male parent for hybridization, respectively, obtains F1 hybrid offspring, eliminates individuals with white and gray skin in the F1 hybrid offspring, retains individuals with sheet feathers and black skin (sheet feathers are dominant genes relative to silk feathers, so the obtained offspring are sheet feathers), and selects roosters as F2 generation male parents and hens as F2 generation female parents for cultivation among the retained hybrid offspring. When selecting the male parent, newly hatched black chicken chicks are selected for cage feeding, and when the chicks are cultivated to 8 weeks old and can distinguish between male and female, roosters with outstanding precocious performance are selected for separation and cultivation, and the weight of the rooster with outstanding precocious performance is 1.8-2.2kg, more preferably 1.9-2.1kg, and more preferably 2.0kg; at 8 weeks old, hens with outstanding reproductive performance are selected for separation and cultivation, and the weight of the hens with outstanding reproductive performance is 1.2-1.5kg, more preferably 1.3-1.5kg, and more preferably 1.5kg. The present invention cultured the selected roosters and hens to 10 weeks of age and then weighed them again, and selected the roosters and hens according to their weight, wherein the weight of the roosters is 90-110% of the average weight of the roosters, more preferably 92-98%, and more preferably 95%; the weight of the hens is 90-110% of the average weight of the hens, more preferably 92-98%, and more preferably 95%; the selected roosters and hens are further cultured, and after cultured to 170-180 days of age, hens with an egg production rate of ≥5% and roosters with a sperm motility of ≥9 are selected as qualified individuals, and after cultured to the 280th to 320th day of age, hybrid parents are cultivated by random mating between families to avoid inbreeding, and avoiding inbreeding specifically means avoiding full-sibling or half-sibling mating to obtain F2 hybrid offspring.

[0027] The present invention selects the skin color of the obtained F2 hybrid offspring, eliminates individuals with white or gray skin color, and retains individuals with black feathers and skin; weighs them weekly, eliminates unqualified individuals, and retains qualified individuals, which are hybrid parents. The unqualified individuals are individuals with a body weight less than 30% of the average body weight; qualified individuals are roosters with a body weight of ≥2kg and hens with a body weight of ≥1.5kg at 60 to 63 days of age, and the hybrid parents are fixed by cross-crossing, and full-sibling or half-sibling mating is avoided during cross-crossing; the offspring obtained by cross-crossing are fast-type black-bone chickens.

[0028] During the breeding process, the black-bone chickens are fed with high-nutrition feed, which includes the following components in parts by weight: 20 to 30 parts of soybean meal, 40 to 50 parts of corn flour, 10 to 15 parts of fish meal, 1 to 5 parts of complex vitamins, and 1 to 5 parts of complex minerals.

[0029] The weight proportion of the soybean meal in the high-nutrient feed is 20 to 30 parts, more preferably 22 to 28 parts, and more preferably 25 parts;

[0030] The weight proportion of the corn flour is 40 to 50 parts, more preferably 43 to 47 parts, and more preferably 45 parts;

[0031] The weight proportion of the fish meal is 10 to 15 parts, more preferably 12 to 14 parts, and more preferably 13 parts;

[0032] The weight proportion of the composite vitamin is 1 to 5 parts, more preferably 2 to 4 parts, and more preferably 3 parts; the composite vitamin includes vitamin A, vitamin D3, vitamin B2 and vitamin E, and the content of vitamin A per kilogram of feed is 3000 to 4000 IU, more preferably 3200 to 3800 IU, and more preferably 3500 IU;

[0033] The content of vitamin D3 in each kilogram of feed is 2000-3000 IU, more preferably 2300-2700 IU, and more preferably 2500 IU;

[0034] The content of vitamin B2 in each kilogram of feed is 600-800 IU, more preferably 650-750 IU, and more preferably 700 IU;

[0035] The content of vitamin E in each kilogram of feed is 1000-2000 IU, more preferably 1200-1800 IU, and more preferably 1500 IU;

[0036] The weight proportion of the composite mineral is 1 to 5 parts, more preferably 2 to 4 parts, and more preferably 3 parts; the composite mineral comprises Zn, Fe, I and Se;

[0037] The content of Zn in each kilogram of feed is 40-50 mg, more preferably 43-47 mg, and more preferably 45 mg;

[0038] The content of Fe in each kilogram of feed is 60-80 mg, more preferably 65-75 mg, and more preferably 70 mg;

[0039] The content of I in each kilogram of feed is 0.5-0.7 mg, more preferably 0.6 mg;

[0040] The content of Se in each kilogram of feed is 0.1-0.2 mg, and more preferably 0.15 mg.

[0041] During the breeding process, the indoor temperature is controlled at 18-22°C, preferably 19-21°C, and more preferably 20°C; the air humidity is controlled at 50-60%, preferably 52-58%, and more preferably 55%, and the light duration is controlled at 10-14h / d, wherein the light duration in summer is 12-14h / d, preferably 12.5-13.5h / d, and more preferably 13h / d, and the light duration in winter is 10-12h / d, preferably 10.5-11.5h / d, and more preferably 11h / d. In addition, during the breeding process, the chicks are vaccinated, and the vaccines include Newcastle disease vaccine, avian influenza vaccine, and Marek's disease vaccine, wherein the timing of the Marek's disease vaccine is 1-3 days old, and more preferably 2 days old; the timing of the avian influenza vaccine is 7-9 days old, and more preferably 8 days old; the timing of the Newcastle disease vaccine is 25-27 days old, and more preferably 26 days old.

[0042] In the breeding process of the present invention, the chickens are regularly monitored for diseases, and the disease monitoring includes blood sample and feces monitoring; by means of serological tests for chicken diseases, it can be determined whether the chickens are infected with pathogens such as viruses, bacteria or parasites, and the spread of the disease can be effectively prevented and controlled; the type of feces is obtained by comparing the color and consistency of the feces with the known feces-disease relationship, so as to monitor the health status of the chickens; the frequency of the disease monitoring is 1 to 2 times a month.

[0043] The technical solutions provided by the present invention are described in detail below in conjunction with the embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0044] Example 1

[0045] Select silky black-bone chickens and recessive white-feathered chickens as the female and male parents, respectively, for hybridization to obtain F1 hybrid offspring, eliminate individuals with white and gray skin from the F1 hybrid offspring, and retain individuals with black feathers and skin. From the retained hybrid offspring, select the male and female parents of the F2 generation. When selecting the male parent, select newly hatched black-bone chicks for cage feeding. When the chicks are 8 weeks old and can distinguish between males and females, select roosters with outstanding precocious performance and a body weight of 1.8 to 2.2 kg for separation and culture. At 8 weeks of age, select hens weighing 1.2 to 1.5 kg for separation and culture. The selected roosters and hens are cultured to 10 weeks of age and then weighed again. Roosters and hens are selected according to their weight, and roosters whose weight accounts for 90-110% of the average weight of roosters and hens whose weight accounts for 90-110% of the average weight of roosters are selected. The selected roosters and hens are continued to be cultured, and after being cultured to 170-180 days of age, hens with an egg production rate ≥5% and roosters with a sperm motility ≥9 are selected as qualified individuals. After the qualified individuals are cultured to 240 days of age, random mating is carried out between families, and full-sibling or half-sibling mating is avoided during mating to obtain F2 hybrid offspring.

[0046] The obtained F2 hybrid offspring are then selected for skin color, and individuals with white or gray skin are eliminated, while individuals with black feathers and skin are retained; they are weighed weekly, unqualified individuals are eliminated, and qualified individuals are retained, which are fast-type black-bone chickens. The unqualified individuals are individuals whose weight is less than 30% of the average weight; qualified individuals are qualified individuals when they are 60 to 63 days old, with a weight of ≥2kg for roosters and ≥1.5kg for hens, and hybrid parents are obtained. After the hybrid parents mature, they are fixed by cross-crossing, and full-sibling or half-sibling mating is avoided during cross-crossing; the offspring obtained by cross-crossing are fast-type black-bone chickens.

[0047] During the breeding process, the black-bone chickens are fed with high-nutrition feed, which includes the following components in parts by weight: 20 parts of soybean meal, 40 parts of corn flour, 10 parts of fish meal, 1 part of complex vitamins, and 1 part of complex minerals; the complex vitamins include vitamin A, vitamin D3, vitamin B2 and vitamin E, and the content of vitamin A per kilogram of feed is 3000 IU, the content of vitamin D3 is 2000 IU, the content of vitamin B2 is 600 IU, and the content of vitamin E is 1000 IU; the complex minerals include Zn, Fe, I and Se, and the content of Zn per kilogram of feed is 40 mg, the content of Fe is 60 mg, the content of I is 0.5 mg, and the content of Se is 0.1 mg.

[0048] During the breeding process, the indoor temperature is controlled at 18-22℃, the air humidity is controlled at 50-60%, the light duration is 12-14h / d in summer, and 10-12h / d in winter. During the breeding process, the chicks are vaccinated with Marek's disease vaccine at 1 day old, avian influenza vaccine at 7 days old, and Newcastle disease vaccine at 25 days old. Blood samples and feces of the chickens are regularly monitored to monitor the health status of the chickens, and the monitoring frequency is once a month.

[0049] Example 2

[0050] Select silky black-bone chickens and recessive white-feathered chickens as the female and male parents, respectively, for hybridization to obtain F1 hybrid offspring, eliminate individuals with white and gray skin in the F1 hybrid offspring, and retain individuals with black feathers and skin. Among the retained hybrid offspring, select the male and female parents of the F2 generation. When selecting the male parent, select the newly hatched black-bone chicken chicks for cage feeding. When the chicks are cultured to 8 weeks old and can distinguish between males and females, select roosters with outstanding precocious performance and a body weight of 2kg for separation and culture. At 8 weeks of age, select hens weighing 1.5kg for separation and culture. The selected roosters and hens are cultured to 10 weeks of age and then weighed again. Roosters and hens are selected based on their weight, and roosters whose weight accounts for 90-110% of the average weight of roosters and hens whose weight accounts for 90-110% of the average weight of roosters are selected. The selected roosters and hens are continued to be cultured until they are 170-180 days of age, and hens with an egg production rate ≥5% and roosters with a sperm motility ≥9 are selected as qualified individuals. After the qualified individuals are cultured to the 260th day of age, random mating is carried out between families, and full-sibling or half-sibling mating is avoided during mating to obtain F2 hybrid offspring.

[0051] The obtained F2 hybrid offspring are then selected for skin color, and individuals with white or gray skin are eliminated, while individuals with black feathers and skin are retained; they are weighed weekly, unqualified individuals are eliminated, and qualified individuals are retained, which are fast-type black-bone chickens. The unqualified individuals are individuals whose weight is less than 30% of the average weight; qualified individuals are qualified individuals when they are 60 to 63 days old, with a weight of ≥2kg for roosters and ≥1.5kg for hens, and hybrid parents are obtained. After the hybrid parents mature, they are fixed by cross-crossing, while avoiding full-sibling or half-sibling mating; the offspring obtained by cross-crossing are fast-type black-bone chickens.

[0052] During the breeding process, the black-bone chickens are fed with high-nutrition feed, which includes the following components in parts by weight: 25 parts of soybean meal, 45 parts of corn flour, 13 parts of fish meal, 3 parts of complex vitamins, and 3 parts of complex minerals; the complex vitamins include vitamin A, vitamin D3, vitamin B2 and vitamin E, and the content of vitamin A per kilogram of feed is 3500 IU, the content of vitamin D3 is 2500 IU, the content of vitamin B2 is 700 IU, and the content of vitamin E is 1500 IU; the complex minerals include Zn, Fe, I and Se, and the content of Zn per kilogram of feed is 45 mg, the content of Fe is 70 mg, the content of I is 0.6 mg, and the content of Se is 0.15 mg.

[0053] During the breeding process, the indoor temperature is controlled at 18-22℃, the air humidity is controlled at 50-60%, the light duration is 12-14h / d in summer, and 10-12h / d in winter. During the breeding process, the chicks are vaccinated with Marek's disease vaccine at 2 days old, avian influenza vaccine at 8 days old, and Newcastle disease vaccine at 26 days old. Blood samples and feces of the chickens are regularly monitored to monitor the health status of the chickens, and the monitoring frequency is once a month.

[0054] Example 3

[0055] Select silky black-bone chickens and recessive white-feathered chickens as the female and male parents, respectively, for hybridization to obtain F1 hybrid offspring, eliminate individuals with white and gray skin in the F1 hybrid offspring, and retain individuals with black feathers and skin. Among the retained hybrid offspring, select the male and female parents of the F2 generation. When selecting the male parent, select the newly hatched black chicken chicks for cage feeding. When the chicks are cultured to 8 weeks old and can distinguish between males and females, select roosters with outstanding precocious performance and a body weight of 2.0 kg for separation and culture. At 8 weeks of age, select hens weighing 1.5 kg for separation and culture. The selected roosters and hens are cultured to 10 weeks of age and then weighed again. Roosters and hens are selected based on their weight, and roosters whose weight accounts for 90-110% of the average weight of roosters and hens whose weight accounts for 90-110% of the average weight of roosters are selected. The selected roosters and hens are continued to be cultured until they are 170-180 days of age, and hens with an egg production rate ≥5% and roosters with a sperm motility ≥9 are selected as qualified individuals. After the qualified individuals are cultured to 280 days of age, random mating is performed between families, and full-sibling or half-sibling mating is avoided during mating to obtain F2 hybrid offspring.

[0056] The obtained F2 hybrid offspring are then selected for skin color, and individuals with white or gray skin are eliminated, while individuals with black feathers and skin are retained; after four weeks, weekly weighing is started, unqualified individuals are eliminated, and qualified individuals are retained, which are fast-type black-bone chickens. The unqualified individuals are individuals whose weight is less than 30% of the average weight; qualified individuals are qualified individuals when they are 60 to 63 days old, with a weight of ≥2kg for roosters and ≥1.5kg for hens, and hybrid parents are obtained. After the hybrid parents mature, they are fixed by cross-crossing, and full-sibling or half-sibling mating is avoided during cross-crossing; the offspring obtained by cross-crossing are fast-type black-bone chickens.

[0057] During the breeding process, the black-bone chickens are fed with high-nutrition feed, which includes the following components in parts by weight: 30 parts of soybean meal, 50 parts of corn flour, 15 parts of fish meal, 5 parts of complex vitamins, and 5 parts of complex minerals; the complex vitamins include vitamin A, vitamin D3, vitamin B2 and vitamin E, and the content of vitamin A per kilogram of feed is 4000 IU, the content of vitamin D3 is 3000 IU, the content of vitamin B2 is 800 IU, and the content of vitamin E is 2000 IU; the complex minerals include Zn, Fe, I and Se, and the content of Zn per kilogram of feed is 50 mg, the content of Fe is 80 mg, the content of I is 0.7 mg, and the content of Se is 0.2 mg.

[0058] During the breeding process, the indoor temperature is controlled at 18-22℃, the air humidity is controlled at 50-60%, the light duration is 12-14h / d in summer, and 10-12h / d in winter. During the breeding process, the chicks are vaccinated with Marek's disease vaccine at 3 days old, avian influenza vaccine at 9 days old, and Newcastle disease vaccine at 27 days old. Blood samples and feces of the chickens are regularly monitored to monitor the health status of the chickens, and the monitoring frequency is twice a month.

[0059] Experimental example

[0060] According to the hybridization method of Example 2, fast-type black-bone chickens were obtained, and 200 fast-type black-bone chickens and 200 silk-feathered black-bone chickens of 1 day old were selected for feeding, half male and half female. During the feeding process, the feed and feeding conditions were the same as those in Example 2. When the fast-type black-bone chickens and silk-feathered black-bone chickens were fed to 8 weeks of age, the average daily weight gain and survival rate of the fast-type black-bone chickens and silk-feathered black-bone chickens were counted; and the weight of the black-bone chickens was counted at 60 days of age, and the results are shown in Table 1.

[0061] Table 1 Growth and production indicators of fast-growing black-bone chickens and silky-feathered black-bone chickens

[0062]

[0063] It can be seen from Table 1 that the fast-growing black-bone chickens obtained by the breeding method of the present invention have a fast growth rate, fast weight gain, high survival rate, strong resistance, good meat quality, and can be put on the market at 60 to 63 days of age, which not only improves the economic benefits of farmers, but also meets the market demand and has a good development prospect.

[0064] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A fast-breeding method for black-bone chickens, characterized in that: The following steps are involved: S1. Selecting silky black-bone chicken and recessive white-feather chicken as the female parent and the male parent, respectively, to crossbreed and obtain F1 hybrid offspring; S2. Eliminate the individuals with white or gray skin in the F1 hybrid offspring, and keep the individuals with black feathers and skin; Among the hybrid offspring retained, roosters with outstanding early maturation performance and hens with high reproductive performance are selected as F2 parents, and they are cultured to 240 to 280 days of age, and the F2 hybrid offspring are bred by random mating between families to avoid inbreeding; S3. The obtained F2 hybrid offspring are then selected for skin color, and individuals with white or gray skin are eliminated, while individuals with black feathers and skin are retained; they are weighed weekly, unqualified individuals are eliminated, and qualified individuals are retained, which are the hybrid parents; after sexual maturity, the hybrid parents are cross-crossed and fixed, which is the fast-growing black chicken.

2. The method according to claim 1, characterized in that The method for selecting the F2 generation father and mother includes the following steps: (1) Weigh the chicks weekly from the time they hatch. At 8 weeks of age, select males weighing ≥1.6 kg; select females weighing ≥1.2 kg for further breeding; (2) raising the roosters and hens selected and bred in step (1) to 10 weeks of age and weighing them again, and selecting roosters and hens whose weight is 90% to 110% of the average weight; (3) After the roosters and hens selected and bred in step (2) are cultured to 170 to 180 days of age, hens with an egg laying rate of ≥5% and roosters with a sperm motility of ≥9 are selected.

3. The method according to claim 2, characterized in that In step (2), the breeding rate of hens is 65-70%, and the breeding rate of roosters is 1:

10.

4. The method according to claim 1, characterized in that: Unqualified individuals in S3 are those whose body weight is less than 30% of the average body weight; qualified individuals are roosters weighing ≥2kg and hens weighing ≥1.5kg at 60 to 63 days of age.

5. The method according to claim 1, characterized in that The feed used in the breeding process includes the following components in parts by weight: 20-30 parts of soybean meal, 40-50 parts of corn flour, 10-15 parts of fish meal, 1-5 parts of complex vitamins and 1-5 parts of complex minerals.

6. The method according to claim 1, characterized in that The temperature during the breeding process is 18-22°C, the air humidity is 50-60%, and the light duration is 10-14h / d.

7. The method according to claim 6, characterized in that The photoperiod in summer is 12-14h / d, and in winter it is 10-12h / d.

8. The method according to claim 1, characterized in that During the breeding process, the chicks are vaccinated with vaccines including Newcastle disease vaccine, avian influenza vaccine and Marek's disease vaccine.

9. The method according to claim 1, characterized in that: Disease monitoring is performed during the breeding process, and the disease monitoring is performed on blood samples and feces. The frequency of the disease monitoring is 1 to 2 times a month.

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