【摘要】 本文利用育种目标制订综合选择指数 ,无须确定性状的经济加权值 ,将该法应用于“荣昌猪瘦肉型品系选育”中 ,其综合选择指数为 :I =- 0 1 5 2 6X1(背膘厚 ) +0 0 0 84X2 (日增重 ) +1 4 4 40 7X3 (体长指数 ) ,间接选择瘦肉率 (Y)。经五个世代的选育 ,三个主选性状及间接选择性状的每代进展分别为 :- 0 1 6 6 (X1)、2 9 8(X2 )、0 0 2 (X3 )和 0 6 5 4(Y) ,均超过育种目标 (- 0 0 93、1 0、0 0 1 5和 0 38) ,提前一个世代完成计划。实践证明该法简便易行 ,准确性高 ,选择效果非常理想 ,可在动物育种中普遍采用。更多还原

【Abstract】 The selection index was been made dependent on breeding goats,which needn’t determine the economic value of traits selected.This method was used in “Selecting Rongchang Pig Lean Striain”.The selection index for Rongchang Pig was I=-0 1526X 1(fat thickness)+0 0084X 2(gain per day)+14 4407X 3(body lenth/heart girth).The lean meat percentage(Y) was been indirectly selected throngh this index.The average resdponse to selection per generation for X 1,X 2,X 3 and Y by selecting five generations were -0 166(cm),29.8(g/day),0.02(cm/cm) and 0.654(%),respectively.They all excceded the selection goals (-0 093,10,0 015 and 0.38).The practice showed that this method was simple and convenient with higher accuracy .Tht effects of selection was very satisfied.更多还原