摘要
研究以logit连接函数结合广义线性混合模型分析蛋鸡蛋黄颜色遗传力。试验素材来自纯系黑羽绿壳蛋鸡与白莱航鸡分离群体,包括亲代、F_1代和F_2代总计2 255只母鸡,每一世代40周龄期间测定蛋品质,以ASReml软件进行方差组分剖析。结果表明:品种、世代和正反交效应对蛋黄颜色有重要影响,将其列入固定效应;蛋黄颜色性状并非正态分布,应用logit连接函数进行数据转换;未经logit连接函数处理蛋黄颜色遗传力为0.14±0.04,连接函数处理后蛋黄颜色遗传力为0.17±0.03。说明蛋黄颜色的遗传力较低,常规育种手段遗传改良的进展较慢。
This study was to estimate heritability on yolk colour （YR） of laying chicken with Generalized Linear Model （GLM） and logit link function. The animals were composed of 2 255 hens including the parent, FL and F2 flocks from a resource population, which crossbred between pure black-feather and blue-eggshell chicken and white Leghorn. The original data set was collected at 40 weeks of age. （Co） variance components were estimated with ASReml software. The results showed as follows：Factors of breeds, generations and reciprocal cross effects should be included in the fix effects because of their important role in yolk colour variations; Data were transformed with logit link function since they were not standard normal distribution;For resource population,heritability with original data set was 0.14±0.04; Accordingly,heritability treated with logit function reached 0.17±0.03. Since the heritability on yolk colour was low, advances in genetic improvement of conventional breeding methods in laying chicken was slow.
出处
《中国家禽》
北大核心
2017年第6期17-19,共3页
China Poultry
基金
现代农业产业技术体系建设专项资金(CARS-41-K02)
江苏省农业三新工程项目(SXGC[2015]299)
江苏省农业科技自主创新资金项目(CX[16]1008)
扬州市科技计划项目(YZ2014148)
