阿斯图里亚纳山谷肉牛品种中产犊难易度、产犊间隔、出生体重和断奶体重之间的遗传关系。

Genetic relationships among calving ease, calving interval, birth weight, and weaning weight in the Asturiana de los Valles beef cattle breed.

作者信息

Gutiérrez J P, Goyache F, Fernández I, Alvarez I, Royo L J

机构信息

Departamento de Producción Animal, Universidad Complutense de Madrid, Avda, Puerta de Hierro s/n, E-28040-Madrid, Spain.

出版信息

J Anim Sci. 2007 Jan;85(1):69-75. doi: 10.2527/jas.2006-168.

DOI:10.2527/jas.2006-168

PMID:17179541

Abstract

The aim of this paper was to estimate direct and maternal genetic parameters for calving ease (CE), birth weight (BrW), weaning weight (WW), and calving interval (CI) to assess the possibility of including this information in beef cattle improvement programs. Field data, including a total of 59,813 animals (1,390 sires and 1,147 maternal grand sires) from the Asturiana de los Valles beef cattle breed, were analyzed with a multivariate linear model. Estimates of heritability for direct genetic effects (CED, CID, BrWD, and WWD) were 0.191 +/- 0.019, 0.121 +/- 0.013, 0.390 +/- 0.030, and 0.453 +/- 0.035, respectively, whereas those for maternal genetic effects (CEM, BrWM, and WWM) were 0.140 +/- 0.015, 0.208 +/- 0.020, and 0.138 +/- 0.022, respectively. Genetic correlations between direct or maternal genetic effects across traits were, in general, positive and moderate to low. However, genetic correlation for the pair CED-BrWD was positive and high (0.604 +/- 0.064). Genetic correlations between the direct and maternal genetic effects within a trait were negative and moderate (-0.219 +/- 0.097 for CE, -0.337 +/- 0.080 for BrW, and -0.440 +/- 0.102 for WW). Genetic correlations for CED-BrWM and CED-WWM were -0.121 +/- 0.090 and -0.097 +/- 0.113, respectively. The genetic correlation for CEM-CID was unfavorable (0.485 +/- 0.078), and those for CEM-BrWD (-0.094 +/- 0.079) and CEM-WWD (-0.125 +/- 0.082) were low and negative. The genetic correlation between CID and WWM was favorable (-0.148 +/- 0.106). Overall, the data presented here support the hypothesis that maternal effects for CE and BrW are not the same and that the genetic relationships between CI and maternal effects for WW in beef cattle follow a similar pattern to that reported between CI and milk yield in dairy cattle. Moreover, the need to include direct and maternal breeding values in beef cattle selection programs is suggested.

摘要

本文旨在估计产犊难易度（CE）、出生体重（BrW）、断奶体重（WW）和产犊间隔（CI）的直接遗传参数和母体遗传参数，以评估将这些信息纳入肉牛改良计划的可能性。利用多元线性模型分析了来自阿斯图里亚纳山谷肉牛品种的59,813头动物（1,390头公牛和1,147头母系祖父）的田间数据。直接遗传效应（CED、CID、BrWD和WWD）的遗传力估计值分别为0.191±0.019、0.121±0.013、0.390±0.030和0.453±0.035，而母体遗传效应（CEM、BrWM和WWM）的遗传力估计值分别为0.140±0.015、0.208±0.020和0.138±0.022。不同性状间直接或母体遗传效应的遗传相关性总体为正，且中等至较低。然而，CED-BrWD这一对性状的遗传相关性为正且较高（0.604±0.064）。同一性状内直接遗传效应与母体遗传效应之间的遗传相关性为负且中等（CE为-0.219±0.097，BrW为-0.337±0.080，WW为-0.440±0.102）。CED-BrWM和CED-WWM的遗传相关性分别为-0.121±0.090和-0.097±0.113。CEM-CID的遗传相关性不利（0.485±0.078），CEM-BrWD（-0.094±0.079）和CEM-WWD（-0.125±0.082）的遗传相关性较低且为负。CID与WWM之间的遗传相关性有利（-0.148±0.106）。总体而言，本文所呈现的数据支持以下假设：CE和BrW的母体效应不同，肉牛中CI与WW母体效应之间的遗传关系与奶牛中CI与产奶量之间的遗传关系模式相似。此外，建议在肉牛选择计划中纳入直接育种值和母体育种值。