科尔沁细毛羊主要经济性状间遗传相关的估计

Genetic correlation estimates of the major economic traits in Horqin fine-wool sheep

为了研究科尔沁细毛羊群体遗传趋势,试验采用父系半同胞组内相关法估算科尔沁细毛羊的体重性状、抓毛性状间的遗传相关和表型相关。结果表明:初生重与断奶重、1周龄体重、2周龄体重、3周龄体重间存在极显著的遗传相关(P<0.01),相关系数分别为0.690 1,0.593 1,0.581 2,0.210 2;断奶重与1周龄体重、2周龄体重、3周龄体重间也存在极显著的遗传相关(P<0.01),相关系数分别为0.373 3,0.274 1,0.268 2;1周龄毛细度与2周龄毛细度、1周龄毛细度与3周龄毛细度、1周龄毛长与1周龄剪毛量、1周龄毛长与3周龄毛长、1周龄剪毛量与3周龄毛细度、2周龄毛细度与3周龄毛细度、2周龄毛细度与3周龄剪毛量、2周龄剪毛量与3周龄剪毛量间存在极显著的高等遗传相关(P<0.01),相关系数分别为0.712 0,0.805 0,0.717 1,0.701 9,0.531 6,0.719 0,0.681 3,0.521 3,表型相关普遍低于遗传相关。

To study genetic trend of the Keerqin fine - wool sheep population, the paternal half - sib correlation method was used to estimate the body weight traits, genetic and phenotypic correlation between fleece traits in the Keerqin fine - wool sheep. The results showed that the correla-tion coefficients were 0. 690 1,0. 593 1,0. 581 2, 0. 210 2 for birth weight with weaning weight, body weight at one week of age, body weight at two week of age, and body weight at three week of age, respectively. The genetic correlations were highly significant （ P 〈 0.01 ） for the four pairs of traits. The correlation coefficients were 0. 373 3,0. 274 1,0. 268 2 for weaning weight with body weight at one week of age, body weight at two week of age, and body weight at three week of age, respectively. The genetic correlations were also highly significant （ P 〈 0.01 ） for the three pairs of traits. The correlation coefficients were 0. 712 0,0. 805 0, 0. 717 1,0. 701 9,0. 531 6,0. 719 0,0. 681 3,0. 521 3 for wool fine- ness at one week and two week of age, wool fineness at one week and three week of age, staple length and fleece weight at one week of age, sta-ple length at one week and three week of age, fleece weight at one week of age and wool fineness at three week of age, wool fineness at two week and three week of age, wool fineness at two week of age and fleece weight at three week of age, and fleece weight at two week and three week of age, respectively. The high genetic correlations were extremely significant （ P 〈 0.01 ） for the eight pairs of traits. The phenotypic correlations were generally lower than the genetic correlations.