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Genetic analysis for growth traits of prolific Garole Malpura (GM) sheep

机译：多产的Garole Malpura（GM）绵羊生长性状的遗传分析

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摘要

The FecB gene of Garole sheep was introgressed into non-prolific Malpura sheep to evolve a new prolific sheep strain Garole Malpura (GM), suitable for semi-arid conditions. The present study was conducted to evaluate the impact of breeding program on production profile of GM sheep and to estimate the genetic parameters for growth traits of GM sheep. Overall prolificacy increased significantly in the new strain as compared to the native Malpura sheep. In the GM flock of F2 and F2 onwards generation 35.31% single, 55.83% twins, 8.16% triplet and 0.70% quadruplets were obtained during lambing. Over the years, prolificacy in the flock has increased significantly. Over all least squares means for birth weight, 3, 6, 9, 12month weight, pre-weaning gain (ADG1) and post-weaning gain (ADG2) were 1.82 plus or minus 0.03, 9.44 plus or minus 0.18, 14.00 plus or minus 0.24, 16.56 plus or minus 0.33, and 19.32 plus or minus 0.35kg, and 84.08 plus or minus 1.84 and 35.19 plus or minus 0.99g, respectively. Majority of the fixed effects had significant influence on the performance traits. The heritability estimates for birth, 3, 6, 9, 12month weight, ADG1 and ADG2 were 0.30 plus or minus 0.11, 0.22 plus or minus 0.09, 0.23 plus or minus 0.10, 0.27 plus or minus 0.10, 0.30 plus or minus 0.11, 0.17 plus or minus 0.08, and 0.17 plus or minus 0.10, respectively. Modest rate of genetic progress seems possible for these traits under selection. The genetic and phenotypic correlations among different body weights were moderate to high and positive. The genetic correlation of pre and post-weaning daily gains with body weight traits were also high and positive.
机译：将Garole羊的FecB基因渗入非多产的Malpura羊中，以进化出一种适用于半干旱条件的新的多产羊品系Garole Malpura（GM）。本研究旨在评估育种程序对转基因绵羊生产概况的影响，并评估转基因绵羊生长性状的遗传参数。与本地马尔普拉羊相比，新品系的总繁殖力显着提高。在F2和F2的转基因羊群中，产羔期间获得了35.31％的单身，55.83％的双胞胎，8.16％的三胞胎和0.70％的四胞胎。多年来，羊群的繁殖力显着提高。在所有最小二乘均值中，出生体重，3、6、9、12个月的体重，断奶前增重（ADG1）和断奶后增重（ADG2）分别为1.82正负0.03、9.44正负0.18、14.00正负。分别为0.24、16.56正负0.33和19.32正负0.35kg，以及84.08正负1.84和35.19正负0.99g。大多数固定效应对性能特征都有重要影响。出生，3、6、9、12个月体重，ADG1和ADG2的遗传力估计值为0.30正负0.11、0.22正负0.09、0.23正负0.10、0.27正负0.10、0.30正负0.11、0.17正负0.08和0.17正负0.10。选择这些性状的遗传进展速度可能不大。不同体重之间的遗传和表型相关性为中度至高度和阳性。断奶前和断奶后日增重与体重性状的遗传相关性也很高且为正。

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