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Meta-analysis of seminal traits affecting bull fertility

机译：影响公牛生育率的开创性特征的荟萃分析

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The pedigree information on bulls was collected from Frozen Semen Bank (FSB). Male reproductive data on seminal characters (semen volume (SV), sperm concentration (SC), initial progressive motility (IPM), post-thaw motility (PTM), and total spermatozoa (TS)) were analyzed to calculate their repeatability, heritability, genetic correlation, phenotypic correlation, and environmental correlation values. The principal component analysis revealed SV and SC were the two most important characters among the five seminal characters that can be further used. The repeatability value for seminal characters was very low (0.02-0.2). The sire component of heritability value varied from very low to low (0.0001 to - 0.24). The dam component of heritability value varied from very low to high (0.01 to 0.64). The genetic correlation value calculated from the sire component indicated a slightly antagonistic relationship between SV and SC (- 0.007) and SV and PTM (- 0.049). The environmental correlation value was found to be negative for all the traits except the value calculated from the dam component between SC and IPM (0.027). The phenotypic correlation values between the seminal traits were low and mostly negative except between SC and IPM (0.107) and PTM and TS (0.109). Statistically significant correlation was observed between PTM and SV (- 0.157), PTM and IPM (- 0.145), PTM and TS (0.109), and SC and IPM (0.107). Since the estimated heritability, repeatability, and the correlation values were found low, individual selection method cannot be applied on these bulls.
机译：从冷冻精液库（FSB）收集了关于公牛的血统信息。分析了雄性生殖数据（精液体积（SV），精子浓度（SC），初始进展运动（IPM），解冻后运动（PTM）和总精子（TS））以计算其可重复性，遗传性，遗传相关，表型相关性和环境相关值。主成分分析显示出SV和SC是可以进一步使用的五种最重要字符中的两个最重要的性状。最精细字符的可重复值非常低（0.02-0.2）。可遗传性值的尺势分量从非常低到低（0.0001至-0.24）。遗传性值的静脉成分从非常低到高（0.01至0.64）。从胎岩组分计算的遗传相关值表明SV和SC（ - 0.007）和SV和PTM之间的略微拮抗关系（ - 0.049）。除了由SC和IPM之间的坝组件计算的值之外，对所有特征的环境相关值被发现为负数（0.027）。除了SC和IPM（0.107）和PTM和TS（0.109）之间，最小性状之间的表型相关值低且大多数是负的负数。在PTM和SV（ - 0.157），PTM和IPM（ - 0.145），PTM和TS（0.109）和SC和IPM之间观察到统计学上显着的相关性，并且（0.107）（0.107）。由于估计的可遗传性，可重复性和相关性，因此在这些公牛上无法应用单独的选择方法。

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