| Since the nineties,with the increase in consumer demand for high quality poultry eggs,Jianghan plain areas of chicken farming development is rapid.In the rapid development of the same time,also led to the local Jianghan chicken varieties of degradation,non-standard,uneven product quality,market sales and other serious problems of confusion.In view of the existing problems,as well as Jiang Han chicken itself,slow growth,small size,sexual maturity and other late characteristics of this study choose the crown base thick,can fly the Jiang Han chicken for the male,choose body rounded,precocious Lingshan chicken In this study,hybridization was carried out,and the mixed hens with Jianghan chicken were selected to perform four backcrosses with Jianghan cock,and then the new varieties of Jianghan chicken were formed.The results of the first roundabout test showed that the chicks were mud yellow and dark gray.Yellow adult feathers for the characteristics of Jiang Han chicken,black adult performance after the performance of Lingshan chicken.Hens average egg weight 46,24 grams,the average egg shape index of 1.32,a few white.The average maturity of the cock is 87 days.The average fertilization rate was 91.82%,the slaughter rate was 76.6%,the slaughter rate was 68.6%,and the hens was 67.4%.The first return to the chicken weight growth has three peaks and three troughs,8 weeks of age after the relative growth is very slow.The first back to the chicken’s egg weight is higher than the Jianghan chicken.Egg egg index is similar,egg shell thickness slightly higher than Jianghan chicken,and hybrid chicken similar to the basic color of eggshell brown.From the experimental results,it can be seen that the use of Lingshan hens and hybrid chicken hybridization,yellow chicken after the performance of Jiang Han chicken characteristics,black chicken after the performance of the characteristics of Lingshan chicken.Tibia development inherited Lingshan chicken,tibia long inherited Jianghan chicken.The first carcasses of chickens were higher than hen.The carcass rate of the first broiler chickens was higher than that of Jianghan chicken,and the carcass rate of hens was lower than that of Jianghan chicken hens.Chicken eggshell thickness slightly higher than Jiang Han chicken,egg yolk retains the characteristics of Jianghan chicken.The second backcross test results show that the chicks are muddy yellow and dark gray,yellow is more than black.Mud chicken feathers show Jiang Han chicken characteristics,tibia yellow.The second back to the chicken body slanting,chest development time and the first back to the chicken is basically the same,mature later performance is shown.There were three peaks in the second round of weight development,and the relative growth was very slow after 18 weeks of age.The second reimbursement of chicken weight growth remained essentially unchanged.The egg weight of the second back to the chicken is higher than that of the Jianghan chicken,and the egg shape index is better than that of the Jianghan chicken.The thickness of the eggshell is slightly higher than that of Jianghan chicken.The egg yolk retains the characteristics of Jianghan chicken.From the experimental results,it can be seen that the use of Lingshan hens and the first back to the hybrid chicken hybrid,mud yellow chicken feathers for the Jiang Han chicken characteristics,black and gray feather feathers for the performance of the characteristics of Lingshan chicken.The second back to the chicken weight growth is basically the same as the first.The tibial development was inherited from the characteristics of Jianghan chicken.The carcass rate of the second backcourt was lower than that of the first time.The hen was slightly higher than the first time.The eggshell thickness of the second backcross egg is slightly higher than that of Jianghan chicken.Egg yolk retains the characteristics of Jianghan chicken.The results of the third backcross test show that chicks are characterized by Jiang Han chicken after adulthood,tibia or cyan.27-week-old cock half-liter slaughter rate of 76.4%,full-bore slaughter rate of 68.4%.The third time back to the chicken 14 weeks of age when the body length,keel length,14 to 19 weeks development slowed down,tibia long after 20 weeks of development.Bust 19 to 23 weeks of age in a slow state of development,24 weeks after the stop in the development of the state.Pelvic bone width of 18 to 24 weeks of age in a slow state of development,25 weeks of age after the stop in the developmental state.Tibia 16 weeks of age basically stopped developing.The weight of the third backcrossed chickens was three peaks and three troughs.The relative growth was very slow at 18 weeks of age and stopped at 27 weeks of age.The third rounded chicken egg weight was higher than that of Jianghan chicken(44g),hybrid chicken(45.30g)for the first time back to the chicken(46.24g)and the second back to the chicken(46.58).The third back to the egg egg shape index than the Jianghan chicken good and hybrid chicken,the first back to the chicken,the second back to the chicken is similar to the third back to the eggs of the eggshell thickness slightly higher than the thickness of Jianghan chicken eggshell,and Hybrid chicken and the first back to the chicken,the second back to the chicken is similar,egg yolk retains the characteristics of Jianghan chicken.The color of the eggshell is basically brown.From the experimental results,it can be seen that the use of Lingshan hens and the second backcross hybrid chicken hybridization,chicks after adult feathers showed Jiang Han chicken characteristics,black and gray chicks adult feathers after the performance of the characteristics of Lingshan chicken.The third backcounted chicken body slant development time was delayed compared to the hybrid chicken one week with the first back to the chicken,ahead of the second back to the chicken development.Long bone length,bust development time and the first back to the chicken and the second back to the chicken is basically the same,indicating that the characteristics of Jianghan chicken through the third back to get a better performance.The carcass rate,half-net rate,full-load rate and the first back-to-back chicken were similar to those of the second back to the chicken.The hen’s carcass rate,,The full net rate was slightly lower than that of the first back to the chicken hen than the second back to the chicken hen.Three times back to the egg egg shape index than the Jianghan chicken good and hybrid chicken,the first back to the chicken,the second back to the chicken is similar to the third back to the eggs of the egg shell thickness slightly higher than the thickness of Jianghan chicken eggshell,and hybrid Chicken and the first back to the chicken,the second back to the chicken is similar,egg yolk retains the characteristics of Jianghan chicken.The color of the eggshell is basically brown.The results of the fourth backcross show that the chicks feather color is divided into mud yellow and dark gray,black and gray chicks adult feathers after the performance of the characteristics of Lingshan chicken.27-week-old cock half-liter slaughter rate of 76.5%,full-bore slaughter rate of 68.5%.The fourth back to the chicken weight growth has three peaks three low,18 weeks after the relative growth is very slow.The fourth back to the chicken weight gain is basically the same as before,egg weight than Jianghan chicken,hybrid chicken high.The egg shape index is better than that of Jianghan chicken and hybrid chicken.Compared with the previous hybrid,the thickness of egg shell is slightly higher than that of Jianghan chicken.Egg yolk retains the characteristics of Jianghan chicken.From the experimental results,it can be seen that the use of Lingshan hens and the third backcross hybrid chicken hybrid,yellow chicken feathers showed Jiang Han chicken characteristics,the fourth back to the chicken development time delayed,than the second back to the chicken development in advance,keel length,Bust development time is basically the same,Jiang Han chicken characteristics are still a good performance,stable development of genetic characteristics of the characteristics of the mountain.The egg weight was slightly higher than that of Jianghan chicken,and the egg yolk retained the characteristics of Jianghan chicken.The egg weight was higher than that of Jianghan chicken.The egg weight was higher than that of Jianghan chicken.TheThe characteristics of the new strains of Jianghan chicken were higher than those of Jianghan chicken,and the appearance characteristics of Jianghan chicken were similar to those of Jianghan chicken.The average age of hens was 152 days older than Jianghan chicken(238 days).66 weeks of laying eggs than Jiang Han chicken(153)more than 39 eggs,the average egg weight of 47.84 grams than Jianghan chicken(44 grams)weight 3.84 grams.The average egg shape index was 1.32 better than Jianghan chicken(1.28),egg shell brown,a few white.The average maturity of the cock was 86 days ahead of Jianghan cock(92 days)6 days ahead of schedule.The average fertilization rate was 92.86% higher than that of Jianghan chicken(81.32),and the average egg hatching rate was 93.54% higher than that of Jianghan chicken(86.30%).Average age 34.5 grams;4 weeks old 160.2 grams;8 weeks 378.4 grams,13 weeks of age 823.5 grams,17 weeks of age 1321.2 grams,21 weeks of age 1521.3 grams,26 weeks 1622.6 grams;27 weeks old cock average half Slaughter rate of 76.7%,hens 75.8%;27-week-old cock average slaughter rate of 68.7%,hens 67.7%.Aquaculture on the use of forest and intercropping between the ecological cultivation of aquaculture technology,a new type of FRP material insulation chicken coop farming technology,chicken cost greatly reduced,farming benefits increased dramatically. |
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