旨在对北京市某母猪场法系大白猪繁殖性状进行遗传参数估计,评估其遗传进展,为该育种场制定合理的育种方案提供理论依据.本研究共收集北京市某母猪场2016-2022年法系大白母猪原始配种记录29 269条,原始分娩记录20 770条,原始系谱记录146 871条,估计该公司法系大白母猪繁殖性状的遗传参数,采用基于动物模型的最佳线性无偏预测(best linear unbiased prediction,BLUP)方法,利用DMU软件使用单性状和双性状重复力模型进行遗传力、遗传相关、表型相关和育种值的估计.结果显示,本研究中法系大白猪TNB为12.67头,NBA为10.90头,NSB为1.35头,MUM为0.14头,LWT为13.99 kg,LW21为73.93 kg;繁殖性状遗传力估计值范围为0.017～0.134,属于低遗传力;繁殖性状间的遗传相关在-0.368～0.856之间,表型相关在-0.213～0.847之间;通过绘制繁殖性状表型趋势图及遗传趋势图发现,个体的繁殖性状表型值呈上升趋势,育种值呈先上升后下降趋势.本研究结果表明,该群体遗传改良取得了良好的进展,研究结果可为法系大白猪的品种选育和遗传改良提供参考指导和理论基础.
Genetic Parameter Estimation and Genetic Progress Analysis of Reproductive Traits in French Large White Pigs
The aim of this study was to estimate the genetic parameters of the reproductive traits of a sow farm in Beijing,evaluate their genetic progress,and provide a theoretical basis for devel-oping a reasonable breeding scheme.In this study,a total of 29 269 original breeding records,20 770 original birth records,and 146 871 original pedigree records were collected from a sow farm in Beijing from 2016 to 2022.The genetic parameters of reproductive traits of French Large White sows in the company were estimated.The best linear unbiased prediction(BLUP)method based on animal model was used to estimate heritability,genetic correlation,phenotypic correla-tion and breeding value by DMU software using single-trait and double-trait repeatability models.The results showed that the TNB was 12.67 heads in this study,the NBA was 10.90 heads,NSB for 1.35 heads,the MUM was 0.14 heads,the LWT was 13.99 kg,the LW 21 was 73.93 kg;The estimated heritability of reproductive traits ranged from 0.017 to 0.134,belongs to the low heritability;Genetic correlations among reproductive traits was between-0.368 and 0.856,phe-notypic correlation was between-0.213 and 0.847;By mapping the phenotypic trends and ge-netic trends of reproductive traits,individuals showed increasing reproductive trait phenotypic values,breeding values rose first and then decreased.The results of this study show that the ge-netic improvement in this population is good,and the results can provide reference guidance and theoretical basis for the breeding and genetic improvement of French Large White pigs.
Large White pigreproductive traitsgenetic parameter estimationgenetic trend
万方数据
维普
