开放核心群育种体系(ONBS)研究 Ⅳ.家禽ONBS的育种效果:线性趋势与群体方差  

STUDIES OF OPEN NUCLEUS BREEDING SYSTEMⅣ.EFFECTS OF POULTRY ONBS AS LINEAR TREND SAND POPULATION VARIANCES

作　　者：吴晓林[1,2,3] 施启顺[1,2,3] 柳小春 沈乃民[1,2,3] 

机构地区：[1]湖南省畜牧兽医研究所 [2]湖南农业大学动物科学技术学院 [3]浙江省杭州市农业科学研究所

出　　处：《湖南农业大学学报（自然科学版）》1998年第1期57-61,共5页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：湖南省教委资助

摘　　要：对引进的祖代Ｘ褐壳蛋鸡的Ｂ系以及复制Ｂ′系自１９９１到１９９５年有关数量性状进行了线性趋势分析，并通过ＭＩＶＱＵＥ法估计了方差组分．结果表明，开放核心群育种体系复制模板群体具有较好的效果，并且可以通过开放的基因流入获取模板群体的育种进展，单位遗传进展的费用最低，因此，在中国目前国情下是培育和维持具国际水准工业化家禽品系的一个理想的育种方法．连续世代的群体方差表现出多样化的变化趋势．遗传方差并非都随选择而减少，上向选择在最初世代可能有利于群体变异的增加．Linear trend analysis was employed to survey the effect of open nucleus breeding system (ONBS) as applied in developing layer industry lines. Variance components were also estimated by means of minimum variance quadratic unbiased estimation (MIVQUE). The results indicated ONBS was effective in developing industry layers. Poultry ONBS is considered a currently desirable approach of breeding internationally elite poultry,for it could achieve breeding progresses of both sides at a minimum cost. Population variances altered irregularly over continuous generations of selection. Similarly,genetic variances were not necessarily reduced by selection,but some exhibited a trend of increase,possibly resulting from increased variation in the first few generations due to upward selection.

关 键 词：卵用鸡 开放核心群 育种体系 线性趋势 遗传方差 

分 类 号：S813.2[农业科学—畜牧学] S831.2[农业科学—畜牧兽医]