Genetic Variability of Maternal Effect on Body Measurements and its Intra- and Inter-Genetic Relationship with Direct Effect in Japanese Black Calves
Genetic Variability of Maternal Effect on Body Measurements and its Intra- and Inter-Genetic Relationship with Direct Effect in Japanese Black Calves
复制标题
母体对日本黑犊牛身体测量影响的遗传变异及其与直接影响的遗传内和遗传间关系
DOI：
10.1111/j.1740-0929.2011.00936.x
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
他
中科院分区：
文献类型：
--
作者：
Munim;T.;Oikawa;T.;Ibi;T.;Kunieda;T.;他
本研究的目的是评估母体影响对日本黑牛犊生长早期身体测量性状的重要性，并估计直接影响和母体影响之间的遗传关系以及日本黑牛犊0月龄（0-mo）和4月龄（4-mo）时身体测量性状之间的遗传关系。使用动物模型通过剩余最大似然程序估算 889 头日本黑牛的身体尺寸和体重。直接遗传力为低至中等，0 个月时范围在 0.17± 0.09 和 0.48± 0.13 之间，4 个月时略低，范围在 0.15± 0.07 和 0.33± 0.13 之间。估计的母体遗传力为低至中等，0个月时范围为0.08± 0.07至0.33± 0.07，4个月时范围为0.13± 0.06至0.33± 0.06。 0个月和4个月之间的直接遗传相关性为中度至高度正相关，范围为0.53±0.23至0.96±0.09。胸部宽度与其他宽度特征的估计直接遗传相关性在两个年龄段均较低且呈正相关，而与臀部宽度的直接遗传相关性在0个月时较高且呈正相关（0.80±0.09），这表明同时改善前部和后部身体宽度是可能的。母体遗传效应相对独立于身体测量性状的直接遗传效应，可以在遗传评估中考虑。
This study was conducted to evaluate the importance of maternal effect on body measurement traits at an early stage of growth, and to estimate the genetic relationships between direct and maternal effects and among body measurement traits at 0 month (0‐mo) and 4 months (4‐mo) of age in a population of Japanese Black calves. Body measurements and body weight of 889 Japanese Black calves were estimated with the use of an animal model by the Residual Maximum Likelihood procedure. Direct heritabilities were low to moderate, ranging between 0.17 ± 0.09 and 0.48 ± 0.13 at 0‐mo, and slightly lower, ranging between 0.15 ± 0.07 and 0.33 ± 0.13 at 4‐mo. Estimated maternal heritabilities were low to moderate, ranging between 0.08 ± 0.07 and 0.33 ± 0.07 at 0‐mo and 0.13 ± 0.06 to 0.33 ± 0.06 at 4‐mo. The direct genetic correlations between 0‐mo and 4‐mo were moderate to highly positive, ranging from 0.53 ± 0.23 to 0.96 ± 0.09. The estimated direct genetic correlation of chest width with other width traits was low and positive at both ages, whereas with hip width it was high and positive (0.80 ± 0.09) at 0‐mo, suggesting that simultaneous improvement of body width of the front and back parts is possible. Maternal genetic effects were relatively independent of direct genetic effects for body measurement traits and can be considered in genetic evaluation.