Genetic and phenotypic parameter estimates for reproduction traits in indigenous Arsi-Bale goats
Genetic and phenotypic parameter estimates for reproduction traits in indigenous Arsi-Bale goats
复制标题
DOI：
10.1007/s11250-011-0034-8
复制
发表时间：
2012-06-01
影响因子：
1.7
通讯作者：
Alemu, Tesfaye
中科院分区：
文献类型：
--
作者：
Kebede, Tesfaye;Haile, Aynalem;Alemu, Tesfaye
本研究旨在评价Arsi-Bale山羊的繁殖性能和估计繁殖性状的遗传参数。共使用了2001至2007年间收集的792条开玩笑记录。用SAS的Proc GLM软件对水坝胎次、年份、季节和打闹类型作为固定效应进行调查。用无导数限制最大似然法(DFREML)对4个动物模型进行拟合，估计遗传参数。大坝平价和开玩笑年限对所有性状都有影响(P<0.05)。初产日龄574.9±8.3日龄，初产仔数280.0±13.7d，初产仔数280.0±-13.7d，初产仔数280.0±-13.7d，初生窝重1.6d+/-0.03d，流产1.37±-0.03 kg，难产3.7%±0.08 kg，初产仔数9.11±-0.38d，初生窝重3.8%，难产0.13%。在最佳模型下，除流产和难产外，其余性状的直接加性遗传力估计分别为0.245+/-0.19，0.060+/-0.08，0.074+/-0.05，0.006+/-0.05，0.125+/-0.05，0.053+/-0.07，相应的永久环境效应为0.00+/-0.00，0.07+/-0.07，0.08+/-0.05，0.172.0 3+/-0.0 4和0.0 7+/-0.0 5。KI、LSB、LSW、LWB和LWW的重复性估计分别为0.13、0.15、0.18、0.16和0.12。生殖性状之间的遗传相关性从中等到高度不等。Arsi-Bale山羊繁殖性能好，繁殖障碍发生率低。除AFK外，其他性状的遗传力都较低，各性状间的遗传相关性较高。在决定是保留还是扑杀这只动物之前，需要反复测量这些特征。
The study was conducted to evaluate reproductive performances and estimate genetic parameters for reproduction traits in Arsi-Bale goats. A total of 792 kidding records collected from 2001 to 2007 were used. Parity of dam, year, season and type of kidding were investigated as fixed effects by PROC GLM of SAS. Derivative-Free Restricted Maximum Likelihood (DFREML) method was used to estimate genetic parameters by fitting four animal models. Parity of dam and year of kidding influenced ( < 0.05) all the traits. The overall means for age at first kidding (AFK), kidding interval (KI), litter size at birth (LSB), litter size at weaning (LSW), litter weight at birth (LWB), litter weight at weaning (LWW), abortion and dystocia were 574.9 +/- 8.3 days, 280.0 +/- 13.7 days, 1.6 +/- 0.03, 1.37 +/- 0.03, 3.7 +/- 0.08 kg, 9.11 +/- 0.38 kg, 3.8% and 0.13%, respectively. The estimates of direct additive heritability for the traits, except for abortion and dystocia, under the best model (direct animal for AFK and repeatability model for other traits) were 0.245 +/- 0.19, 0.060 +/- 0.08, 0.074 +/- 0.05, 0.006 +/- 0.05, 0.125 +/- 0.05, 0.053 +/- 0.07, respectively, while the corresponding permanent environmental effects were 0.00 +/- 0.00, 0.07 +/- 0.07, 0.08 +/- 0.05, 0.172 +/- 0.06, 0.03 +/- 0.04 and 0.07 +/- 0.05, respectively. Repeatability estimates for KI, LSB, LSW, LWB and LWW were 0.13, 0.15, 0.18, 0.16 and 0.12, respectively. Genetic correlations between reproductive traits vary from medium to high. Arsi-Bale goats have good reproductive performance with low incidence of reproductive disorder. Except for AFK, other traits have low estimates of heritabilities with high genetic correlation among the traits. Repeated measures of the traits are needed before deciding to keep or cull the animal.