优质鸡睾丸重的遗传选择  

Genetic selection for testicle weight in quality chicken

作　　者：徐振强 彭志军 季从亮 张德祥[1,2] XU Zhenqiang;PENG Zhijun;JI Congliang;ZHANG Dexiang(College of Animal Science,South China Agricultural University,Guangzhou 510642,China;Guangdong Wen's Nanfang Poultry Breeding Co.Ltd.,Yunfu 527400,China)

机构地区：[1]华南农业大学,广州510642 [2]广东温氏南方家禽育种有限公司,广东云浮527400

出　　处：《黑龙江畜牧兽医》2019年第2期37-39,178,共4页Heilongjiang Animal Science And veterinary Medicine

基　　金：国家肉鸡产业技术体系项目(CARS-41-Z15);广东省现代农业科技创新联盟建设项目(2016LM4243;2016LM4244)

摘　　要：为了提高优质鸡睾丸重,试验采用屠宰法测定天露黄鸡N409品系08世代第1批次的睾丸重,结合系谱信息,采用平均信息约束最大似然法(AI-REML)估计其遗传参数,采用动物模型最佳线性无偏预测(BLUP)法估计同胞个体睾丸重育种值,基于育种值进行选种和组建双向选择系。结果表明:未经正态转换和经过Box-Cox转换的105天睾丸重遗传力分别为0. 64和0. 66,属于高遗传力性状;表型正态与否并不影响候选同胞个体的育种值排序;经睾丸重育种值排序后筛选出小睾丸、中睾丸和大睾丸公鸡,与母鸡组建双向系,其后代公鸡睾丸重差异显著(P<0. 05),而体重差异不显著(P>0. 05)。说明基于上述方法提高优质鸡睾丸重可行,而且选择睾丸重不影响后代体重。In order to increase the testicle weight of Tianlu yellow chicken,the testicle weight of the first batch was obtained by slaughtering.Combined with pedigree information,the genetic parameters of this trait were predicted by AI-REML,and then the breeding values of the candidate individuals were estimated by the animal model BLUP simultaneously. The individuals with divergent testicle weights were retained and used to form divergently selected lines. The results showed that the heritability of the testicle weight before and after Box-Cox transformation at105 d were 0. 64 and 0. 66,respectively,indicating that the testicle weight at 105 d of Tianlu yellow chicken was a high heritable trait. The results also suggested that the ranking of the estimated breeding values of the candidate individuals would not be affected by the distribution type of the known phenotype. In the candidate group,the male chickens with smallest,medium and biggest testes and the corresponding female chickens were selected to reproduce the next generation and the differences of the testicle weight of their offspring were significant( P<0. 05).However,the differences among their body weights were not significant( P>0. 05). The above breeding method was effective in increasing the testicle weight of quality chicken,whereas it had no effect on the body weight.

关 键 词：优质鸡 屠宰测定 睾丸重 遗传力 双向选择系 

分 类 号：S831.2[农业科学—畜牧学]