A method for breeding a Wenchang chicken strain with high production performance

Abstract

The present invention proposes a method for breeding a high-performance Wenchang chicken complementary line. The method comprises: establishing a complementary line breeding population of four Wenchang chicken lines, namely, the specialized Wenchang chicken lines LA, LB, CU3, and CK, with the specialized Wenchang chicken line LA serving as the maternal parent, the specialized Wenchang chicken line LB serving as the maternal parent, the specialized Wenchang chicken line CU3 serving as the paternal parent, and the specialized Wenchang chicken line CK serving as the paternal parent; selecting seeds based on comprehensive indicators to control seed retention rates; and selecting the chicken breed obtained by crossbreeding the terminal maternal and terminal paternal lines as the target complementary line commercial broiler chicken. The Longquan Wenchang chicken complementary line commercial broiler chicken obtained by the present invention not only enhances the high-quality flavor and appearance of the local Wenchang chicken breed, but also significantly improves its production performance.

Description

Technical Field

[0001] The invention relates to the technical field of poultry breeding, and in particular to a method for breeding a Wenchang chicken matching line with high production performance. Background Art

[0002] Specialized breeds first appeared in the mid-1860s. With the specialization and commercialization of livestock and poultry production, and with advances in technology, specialized breeds have rapidly developed, becoming particularly prevalent in the poultry and pig industries. Chicken production has shifted from dual-purpose production to a dual focus on both meat and egg production. The Avian broiler line, the Avalon broiler line, and the premium broiler line are all examples of specialized breed hybridization efforts in broiler production; while breeds like Nongda No. 3 are outstanding examples of specialized breed hybridization efforts in egg production. The duck and goose industries have also seen success, with specialized breeds of Peking ducks and broiler geese now in production, as well as specialized breeds for producing foie gras.

[0003] Specialized strains are selected and bred based on breeding objectives to achieve specialized production performance. Different strains have their own distinct advantages. For example, in chicken breeding, it's impossible to concentrate all key economic traits (egg production, growth rate, feed conversion rate, meat quality, fertility rate, etc.) in a single breed. This is because some traits are interrelated, while others are antagonistic. However, it is entirely possible to focus on cultivating specialized strains with one or two outstanding economic traits while maintaining other traits at a general level. The unique combining ability of specialized strains can be utilized to produce high-quality, grain-saving, high-yield, and high-efficiency commercial livestock and poultry—this is known as hybrid vigor.

[0004] Although efforts to purify and rejuvenate Wenchang chickens have been underway since 1997, the advantages of this superior genetic resource have yet to be fully exploited. Rapidly developing a diverse new breed of Wenchang chicken that meets market demand while maintaining its quality and flavor has become a critical challenge hindering the development of the Wenchang chicken industry. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to propose a method for breeding a Wenchang chicken matching line with high production performance to solve the above problems.

[0006] The technical solution of the present invention is achieved as follows:

[0007] A method for breeding a Wenchang chicken strain with high production performance comprises the following breeding steps:

[0008] Composition of S1 supporting system: Wenchang chicken specialized lines LA, LB, CU3 and CK are used to form the supporting system breeding population of the four Wenchang chicken lines, with Wenchang chicken specialized line LA as the maternal parent, Wenchang chicken specialized line LB as the maternal parent, Wenchang chicken specialized line CU3 as the paternal parent, and Wenchang chicken specialized line CK as the paternal parent;

[0009] S2 breeding: The Wenchang chicken bred after hybrid breeding of the Wenchang chicken specialized line LA is used as the first maternal LA line, the Wenchang chicken bred after hybrid breeding of the Wenchang chicken specialized line LB is used as the first paternal LB line, the Wenchang chicken bred after hybrid breeding of the LA line and the LB line is used as the terminal maternal LALB line, the Wenchang chicken bred after hybrid breeding of the Wenchang chicken specialized line CU3 is used as the second maternal CU3 line, the Wenchang chicken bred after hybrid breeding of the Wenchang chicken specialized line CK is used as the second paternal CK line, and the Wenchang chicken bred after hybrid breeding of the CU3 line and the CK line is used as the terminal paternal CU3CK line;

[0010] Select and eliminate seeds according to comprehensive indicators to control seed retention rate;

[0011] S3 breeding: The Wenchang chicken breed, which is bred by hybridizing the terminal maternal LALB line and the terminal paternal CU3CK line, is the target complementary commercial broiler chicken.

[0012] To further illustrate, in step S2, each generation of breeding includes 60 to 80 families, and the ratio of roosters to hens in each family is 1:10 to 15.

[0013] It is further explained that the breeding rate of hens in each generation is 20.0% to 25.0%, and the breeding rate of roosters is 3.0% to 8.0%.

[0014] Further explanation, after at least 10 generations.

[0015] To further illustrate, in step S2, feather speed, feather color, weight, body shape, survival rate or reproductive performance are used as breeding indicators, and reproductive performance includes egg production number and / or fertilization rate.

[0016] To further explain, the Wenchang chicken specialized strain LA, the first maternal LA strain, the terminal maternal LALB strain, the Wenchang chicken specialized strain CU3, and the second maternal CU3 strain were selected for plumage color, body shape, reproductive performance, and survival rate;

[0017] The Wenchang chicken specialized strain LB and the first sire LB strain were selected for feather speed, feather color, weight, body shape and survival rate;

[0018] The Wenchang chicken specialized line CK, the second sire CK line and the terminal sire CU3CK line were selected for feather speed, body weight and survival rate.

[0019] According to the Wenchang chicken breeding method, the characteristics are as follows: in the Wenchang chicken specialized strain LA, the first maternal strain LA and the terminal maternal strain LALB, the roosters are selected to have reddish-brown feathers, the hens are selected to have yellowish-brown feathers, and the body shape is rectangular;

[0020] Among the Wenchang chicken specialized strain CU3 and the second female CU3 strain, the selected ones all have yellow-brown feathers and rectangular body shapes;

[0021] In the Wenchang chicken specialized strain LB and the first paternal LB strain, the roosters are selected to have reddish-brown feathers and the hens are selected to have yellowish-brown feathers. The feathering speed of both is slow-feathering gene, and the body shape of both is trapezoidal.

[0022] In the Wenchang chicken specialized strain CK and the second sire CK line, the roosters are selected to have yellow-brown feathers, and the hens are selected to have yellow-brown feathers. They all have fast feathering genes and a wide trapezoidal body shape.

[0023] In the terminal male parent CU3CK line, the fast feathering genes were selected, and the body shape was wide trapezoidal.

[0024] To further illustrate, in step S2, the breeding process includes the following:

[0025] At 7 to 9 weeks of age, individuals that do not meet the weight requirements or do not meet the appearance requirements are eliminated from the first maternal LA line, the first sire LB line, the second maternal CU3 line, and the second sire CK line. Individuals with weight breeding values ​​in the bottom 20 to 30% are also eliminated from the second maternal CU3 line and the second sire CK line.

[0026] At 16-18 weeks of age, individuals from families with large weight, high uniformity, and high survival rate are selected from the first sire LB line and the second sire CK line, taking into account appearance traits. The selection indicators for appearance traits include crown height, crown shape, or shank length.

[0027] At 24-26 weeks of age, individuals with unsatisfactory appearance, poor development, and weak constitution were removed from the first maternal LA line, the first paternal LB line, the second maternal CU3 line, and the second paternal CK line, and individuals positive for avian leukosis were eliminated;

[0028] The first sire LB line is selected based on the weight and egg production performance at 6 to 15 weeks of age, and individuals from families with the highest indicators are selected;

[0029] The second sire CK line selects individuals from the family with large body weight, high uniformity and high survival rate;

[0030] At 30-32 weeks of age, individuals with unsatisfactory appearance, poor development, or weak constitution were eliminated from the first maternal LA line, the first paternal LB line, the second maternal CU3 line, and the second paternal CK line;

[0031] At 42 to 43 weeks of age, a core group is formed and ranked according to the comprehensive selection index. After eliminating individuals with a small number of eggs laid in 10 to 11 days, the remaining ones are selected in order.

[0032] To further explain, at the age of 7 to 9 weeks, the first paternal LB line and the second paternal CK line eliminated slow-feathering heterozygous individuals starting from the G7 generation.

[0033] To further clarify, all specialized strains of Wenchang chicken are Longquan Wenchang chicken.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The present invention uses four pure local chicken breeds of Wenchang chicken specialized lines LA, LB, CU3 and CK as materials for breeding, and establishes a matching system breeding method for the four specialized lines of Longquan Wenchang chicken. In the breeding process, a combination of conventional breeding and molecular breeding is adopted, and corresponding target indicators and elimination indicators are established for different lines in stages. The Wenchang chicken bred after hybridization and breeding of the Wenchang chicken specialized line LA is used as the first maternal LA line, the Wenchang chicken bred after hybridization and breeding of the Wenchang chicken specialized line LB is used as the first paternal LB line, the Wenchang chicken bred after hybridization and breeding of the LA line and the LB line is used as the terminal maternal LALB line, and the Wenchang chicken bred after hybridization and breeding of the Wenchang chicken specialized line CU3 is used as the terminal maternal LALB line. The CU3 line is the second maternal line, the Wenchang chicken bred after hybrid breeding with the Wenchang chicken specialized line CK is the second paternal line CK, and the Wenchang chicken bred after hybrid breeding with the CU3 line and the CK line is the terminal paternal line CU3CK line. The commercial broiler chicken with the combination of (CU3CK♂)×(LALB♀) is obtained, which not only improves the high-quality flavor and appearance traits of the Wenchang chicken local breed, but also greatly improves its production performance. It is suitable for standardized large-scale breeding, and can effectively promote and drive the development and utilization of the genetic resources of Wenchang local chicken breeds.

[0036] The breeding method of the four specialized strains of the Wenchang chicken specialized strain established by the present invention is beneficial to promoting the growth and development of the Wenchang chicken local breed and can improve its survival rate.

[0037] The Longquan Wenchang chicken line boasts excellent performance across the board, boasting high reproductive performance in its parent breeders, self-sexed commercial broilers, strong disease resistance, and superior meat flavor. The commercial broilers' body shape, appearance, production performance, and meat quality meet the demands of domestic provinces like Hainan, Guangdong, Zhejiang, and Jiangsu, as well as overseas markets like Singapore. They are suitable for both standardized, scaled-up farming and outdoor, ecologically controlled farming under forests. Hainan Province produced 135 million Wenchang chickens in 2020. As a superior Wenchang chicken line, the Longquan Wenchang chicken holds broad application prospects. DETAILED DESCRIPTION

[0038] In order to better understand the technical content of the present invention, specific examples are provided below to further illustrate the present invention.

[0039] Unless otherwise specified, the experimental methods used in the examples of the present invention are all conventional methods.

[0040] Unless otherwise specified, the materials, reagents, etc. used in the examples of the present invention can be obtained from commercial sources.

[0041] Example 1

[0042] The Wenchang chicken specialized lines LA, LB, CU3 and CK were used to form a supporting breeding group for the four Wenchang chicken lines. The Wenchang chicken specialized line LA was used as the maternal parent, the Wenchang chicken specialized line LB was used as the maternal parent, the Wenchang chicken specialized line CU3 was used as the paternal parent, and the Wenchang chicken specialized line CK was used as the paternal parent. The basic group was established in 2010, and 10 generations of breeding had been completed by 2020. Each generation of breeding included 60 to 80 families. The ratio of roosters to hens in each family was 1:15. The hen retention rate of each generation was 20.0 to 25.0%, and the rooster retention rate was 3.0% to 8.0%.

[0043] The breeding objectives of the first female LA line are: reddish-brown feathers for roosters and yellowish-brown feathers for hens, with emphasis on egg production, fertility rate, and qualified rate; supplemented by selection for uniformity, survival rate, and appearance traits;

[0044] The first sire LB line selection goal is: slow feathering gene, reddish-brown feathers for roosters and yellow-brown feathers for hens; comprehensive selection is based on weight, egg production, uniformity and survival rate;

[0045] The breeding objectives of the second female parent CU3 line are: yellow-brown feathers for roosters and yellow-brown feathers for hens, with emphasis on egg production, fertility rate, and qualified rate;

[0046] The second sire CK line breeding objectives are: fast feathering genes, yellow-brown feathers for roosters and yellow-brown feathers for hens, with emphasis on weight, uniformity, and survival rate; supplemented by selection for egg production, fertility rate, and appearance traits;

[0047] In the terminal female LALB line, the roosters are selected with reddish-brown feathers, and the hens are selected with yellowish-brown feathers, and both have a rectangular body shape;

[0048] In the terminal male parent CU3CK line, the fast feathering genes were selected, and the body shape was wide trapezoidal.

[0049] The breeding methods and procedures are as follows:

[0050] (1) Newborn: Select healthy individuals that meet the breed's appearance characteristics for breeding and wear wing numbers. At the same time, the first paternal parent, the LB line, must be a slow-feathering line, and the second paternal parent, the CK line, must be a fast-feathering line.

[0051] (2) 8 weeks of age: weigh the entire group, record individual data, and eliminate individuals with weight outliers (more than 3 standard deviations) and those that do not meet the breed appearance characteristics;

[0052] The second maternal CU3 line and the second paternal CK line additionally eliminated individuals with weight breeding values ​​in the bottom 25%; the first paternal LB line and the second paternal CK line took blood samples from the G7 generation for fast and slow feather gene testing, eliminated slow feather heterozygous individuals, tested the entire group in the G8-G9 generations, and conducted sampling tests in each generation thereafter.

[0053] (3) 17 weeks: weigh the entire flock and record individual data;

[0054] This week-old age, the focus is on the first sire LB line and the second sire CK line, mainly selecting weight, uniformity and survival rate, while taking into account appearance traits, selecting individuals in the family with heavy weight, high uniformity and high survival rate. The selection indicators of appearance traits mainly include crown height, crown shape, feather color and shank length.

[0055] (4) 24-26 weeks of age: Weigh the entire flock and record individual data. From the first maternal LA line, the first paternal LB line, the second maternal CU3 line, and the second paternal CK line, eliminate individuals with unsatisfactory appearance, poor development, or weak constitution, and eliminate individuals positive for avian leukosis.

[0056] This week of breeding focuses on the first sire LB line, combining weight data from 6 to 15 weeks of age, individual egg production, and family egg production performance to select individuals from families with the highest indicators.

[0057] The second paternal CK line selects individuals in the family with large body weight, high uniformity and high survival rate.

[0058] (5) 30-32 weeks of age: Eliminate individuals with unsatisfactory appearance, poor development, and weak constitution from the first maternal LA line, the first paternal LB line, the second maternal CU3 line, and the second paternal CK line.

[0059] (6) Core group selection: The core group is formed at 43 weeks of age and sorted according to the comprehensive selection index. After eliminating individuals with low egg production within 10 days, they are selected in order. Tests for Salmonella pullorum and avian leukosis are carried out, and the body shape and appearance of the pre-selected roosters are checked and sperm motility is checked. When forming a family, the principle of avoiding three generations of inbreeding is followed and balanced mating is carried out according to the breeding values ​​of weight and egg production.

[0060] Example 2

[0061] Wenchang chicken specialized strains LA, LB, CU3 and CK were tested in different hybrid combinations. The specific patterns of each combination are as follows:

[0062] Combination 1: (CU3LB♂)×(LACK♀)

[0063] Combination 2: (CU3LA♀)×(LBCK♂)

[0064] Combination 3: (CU3CK♀)×(LALB♂)

[0065] Combination 4: (CU3CK♂)×(LALB♀)

[0066] Performance measurements of commercial broiler chickens derived from the Longquan and Wenchang lines were conducted from January 20, 2013, to 16 weeks of age. Performance statistics for commercial broiler chickens derived from different lineage combinations are shown in Table 1.

[0067] Table 1 Statistics of production performance of commercial broiler chickens with different matching lines

[0068]

[0069] The results of the combining ability test show that the production performance of commercial broiler chickens obtained by the combination of (CU3CK♂)×(LALB♀) is higher.

[0070] Example 3

[0071] The production performance, slaughter performance and meat flavor of commercial broiler chickens with the combination of (CU3CK♂)×(LALB♀) are as follows:

[0072] Table 2 Production performance of commercial broiler chickens of Longquan Wenchang chicken series

[0073]

[0074]

[0075] Table 3 Slaughter performance of commercial broiler chickens of Longquan Wenchang chicken series

[0076]

[0077] Table 4 Meat quality and flavor indexes of commercial broiler chickens of Longquan Wenchang chicken series

[0078]

[0079] Example 4

[0080] The Wenchang chicken specialized lines LA, LB and CK were used to form a supporting breeding group for the three Wenchang chicken lines. The Wenchang chicken specialized line LA was used as the maternal parent, the Wenchang chicken specialized line LB was used as the maternal parent, and the Wenchang chicken specialized line CK was used as the terminal parent. The basic group was established in 2010, and 10 generations of breeding had been completed by 2020. Each generation of breeding included 60 to 80 families. The ratio of roosters to hens in each family was 1:15. The hen breeding rate of each generation was 20.0 to 25.0%, and the rooster breeding rate was 3.0% to 8.0%.

[0081] The breeding goal of the first female LA line is to select for rectangular body shape, focusing on egg production, fertility rate and qualified rate of hatching eggs; auxiliary selection is for uniformity, survival rate and appearance traits;

[0082] The breeding goal of the first sire LB line is trapezoidal body shape; comprehensive selection of body weight, egg production, uniformity and survival rate;

[0083] The breeding objectives of the terminal sire CK line are: wide trapezoidal body shape; focus on breeding weight, uniformity, survival rate, and appearance traits; auxiliary selection is for egg production and fertility rate;

[0084] In the terminal female LALB line, the roosters are selected with reddish-brown feathers, the hens are selected with yellowish-brown feathers, and both have a rectangular body shape.

[0085] The breeding methods and procedures are as follows:

[0086] (1) Newborn: Select healthy individuals that meet the breed's body characteristics for breeding.

[0087] (2) 8 weeks of age: Weigh the entire flock, record individual data, and eliminate individuals with weight outliers (more than 3 standard deviations) and those that do not meet the breed's body shape characteristics; for the terminal sire CK line, additionally eliminate individuals with weight breeding values ​​in the bottom 25%.

[0088] (3) 17 weeks of age: weigh the entire group and record individual data.

[0089] (4) 24-26 weeks of age: Weigh the entire flock, record individual data, and eliminate individuals with unsatisfactory appearance, poor development, and weak physique from the first maternal LA line, the first paternal LB line, and the terminal paternal CK line, as well as individuals positive for avian leukosis;

[0090] This week of age, the focus is on breeding the first sire LB line, and comprehensive selection is made based on the weight data of the previous 6 to 15 weeks of age, individual laying conditions and family egg-laying performance, and individuals from families with higher indicators are selected.

[0091] (5) 30-32 weeks of age: Eliminate individuals with unsatisfactory appearance, poor development, and weak constitution from the first maternal LA line, the first paternal LB line, and the terminal paternal CK line.

[0092] (6) Core group selection: The core group is formed at 43 weeks of age and sorted according to the comprehensive selection index. After eliminating individuals with low egg production within 10 days, they are selected in order. Tests for Salmonella pullorum and avian leukosis are carried out, and the body characteristics of the pre-selected roosters are checked and their sperm motility is checked. When forming a family, the principle of avoiding three generations of inbreeding is followed and balanced mating is carried out based on the breeding values ​​of body weight and egg production.

[0093] After testing, the commercial broiler chickens obtained from the CK♂×(LBLA♀) combination had a slaughter rate of 83.6% for roosters (13 weeks old) and 84.5% for hens (15 weeks old), with low slaughter performance. The survival rates at 16 weeks of age were 83.7% and 82.2%, respectively.

[0094] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for breeding a high-performance Wenchang chicken strain, characterized in that: The breeding steps include: Composition of S1 supporting system: Wenchang chicken specialized lines LA, LB, CU3 and CK are used to form the supporting system breeding population of the four Wenchang chicken lines, with Wenchang chicken specialized line LA as the maternal parent, Wenchang chicken specialized line LB as the maternal parent, Wenchang chicken specialized line CU3 as the paternal parent, and Wenchang chicken specialized line CK as the paternal parent; S2 breeding: The Wenchang chicken bred after hybrid breeding of the Wenchang chicken specialized line LA is used as the first maternal LA line, the Wenchang chicken bred after hybrid breeding of the Wenchang chicken specialized line LB is used as the first paternal LB line, the Wenchang chicken bred after hybrid breeding of the LA line and the LB line is used as the terminal maternal LALB line, the Wenchang chicken bred after hybrid breeding of the Wenchang chicken specialized line CU3 is used as the second maternal CU3 line, the Wenchang chicken bred after hybrid breeding of the Wenchang chicken specialized line CK is used as the second paternal CK line, and the Wenchang chicken bred after hybrid breeding of the CU3 line and the CK line is used as the terminal paternal CU3CK line; In step S2, feather speed, feather color, weight, body shape, survival rate or reproductive performance are used as breeding indicators, and reproductive performance includes egg production and / or fertilization rate; The Wenchang chicken specialized strain LA, the first maternal strain LA, the terminal maternal strain LALB, the Wenchang chicken specialized strain CU3, and the second maternal strain CU3 were selected for feather color, body shape, reproductive performance, and survival rate; The Wenchang chicken specialized strain LB and the first sire LB strain were selected for feather speed, feather color, weight, body shape and survival rate; The Wenchang chicken specialized line CK, the second sire CK line and the terminal sire CU3CK line were selected for feathering speed, body weight and survival rate; In step S2, the breeding process includes the following: At 7-9 weeks of age, individuals with substandard weight and appearance characteristics are eliminated from the first maternal LA line, the first sire LB line, the second maternal CU3 line, and the second sire CK line. Individuals with weight breeding values ​​in the bottom 20-30% are also eliminated from the second maternal CU3 line and the second sire CK line. At 16-18 weeks of age, individuals from families with large weight, high uniformity, and high survival rate were selected from the first sire LB line and the second sire CK line, taking into account appearance traits. The selection indicators for appearance traits include crown height, crown shape, or shank length. At 24-26 weeks of age, individuals with unsatisfactory appearance, poor development, and weak constitution were removed from the first maternal LA line, the first paternal LB line, the second maternal CU3 line, and the second paternal CK line, and individuals positive for avian leukosis were eliminated; The first sire LB line is selected based on the weight and egg production performance at 6 to 15 weeks of age, and individuals from families with the highest indicators are selected; The second sire CK line selects individuals from the family with large body weight, high uniformity and high survival rate; At 30-32 weeks of age, individuals with unsatisfactory appearance, poor development, or weak constitution were eliminated from the first maternal LA line, the first paternal LB line, the second maternal CU3 line, and the second paternal CK line; At 42-43 weeks of age, a core group is formed and sorted according to the comprehensive selection index. After eliminating individuals with low egg production for 10-11 days, the remaining individuals are selected in order; Select and eliminate seeds according to comprehensive indicators to control seed retention rate; S3 breeding: The Wenchang chicken breed, which is bred by hybridizing the terminal maternal LALB line and the terminal paternal CU3CK line, is the target complementary commercial broiler chicken.

2. The Wenchang chicken breeding method according to claim 1, characterized in that: In step S2, each generation of breeding includes 60 to 80 families, and the ratio of roosters to hens in each family is 1:10 to 15.

3. The Wenchang chicken breeding method according to claim 2, characterized in that: The breeding rate of hens in each generation is 20.0%~25.0%, and the breeding rate of roosters is 3.0%~8.0%.

4. The Wenchang chicken breeding method according to claim 3, characterized in that: After at least 10 generations.

5. The Wenchang chicken breeding method according to claim 1, characterized in that: In the Wenchang chicken specialized strain LA, the first maternal strain LA and the terminal maternal strain LALB, the roosters are selected to have reddish-brown feathers and the hens are selected to have yellow-brown feathers, and all have a rectangular body shape; Among the Wenchang chicken specialized strain CU3 and the second female CU3 strain, the selected ones all have yellow-brown feathers and rectangular body shapes; In the Wenchang chicken specialized strain LB and the first paternal LB strain, the roosters are selected to have reddish-brown feathers and the hens are selected to have yellowish-brown feathers. The feathering speed of both is slow-feathering gene, and the body shape of both is trapezoidal. In the Wenchang chicken specialized strain CK and the second sire CK line, the roosters are selected to have yellow-brown feathers, and the hens are selected to have yellow-brown feathers. They all have fast feathering genes and a wide trapezoidal body shape. In the terminal male parent CU3CK line, the fast feathering genes were selected, and the body shape was wide trapezoidal.

6. The Wenchang chicken breeding method according to claim 1, characterized in that: At 7 to 9 weeks of age, the first paternal LB line and the second paternal CK line began to eliminate slow-feathering heterozygous individuals from the G7 generation.

7. The Wenchang chicken breeding method according to claim 1, characterized in that: All specialized breeds of Wenchang chicken are Longquan Wenchang chicken.

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