基于生长曲线分析琅琊鸡母鸡的保种效果OA

In order to evaluate the preservation effect of the populations in National Chickens Genetic Resources(Jiangsu),three nonlinear growth models,Logistic,Gompertz and Bertalanffy,were used to fit the growth of hens in two generation Langya chicken preservation population in 2019 and 2022.The results showed that the body weight fitting degrees(R2)of three models in the two generations of hens were all above 0.996.According to the R2 values of 0.997 and 0.998,the Gompertz model had the best growth fitting effect in Langya chickens.The asymptotic body weights fitted for the two generations of hens were 1 967.965 g and 1 896.725 g.The turning point age were 6.184 weeks and 6.321 weeks.The results were consistent with the actual situations of the preservation and production in Langya chickens.In summary,in the process of local chicken preservation,the population can be scientifically and reasonably fed and managed.And the preservation effect can be monitored based on the characteristics of the growth curve.This study provides a scientific basis for the protection,development and utilization of local chicken genetic resources.