摘要
本文以 1 2个品种或组合猪为研究对象 ,收集了其 1胎、2胎及经产共 42 6 9窝产仔数和产活仔数的数据资料。纯种猪混合胎次窝产仔数以四川白猪Ⅰ系为最高 ,产仔数和产活仔数分别为 1 1 6 1头和 1 0 71头 ,本地猪、杜洛克猪和长白猪居中 ,分别为 1 0 86头和 1 0 0 6头、1 0 0 7头和 9 33头、9 85头和 9 2 6头 ,大白猪的产仔数和产活仔数最低 ,分别为 9 34头和 8 87头。二杂母猪的窝仔数以DL、DI、YI、DY较高 ,其产仔数和产活仔数分别为 1 1 4 9头和 1 0 80头、1 1 4 8头和 1 0 38头、1 1 36头和 1 0 4 5头、1 0 89头和 1 0 89头 ,YL、YB较低 ,分别为 1 0 2 7头和 9 6 5头、1 0 1 8头和 9 84头。二杂母猪产仔数和产活仔数的平均杂种优势率分别为 8 2 6 %和 9 4 1 % ,其中DL、DI、DY3个组合产仔数和产活仔数的平均杂种优势率分别为 1 1 1 4 %和 1 3 1 3% ,TI、YL、YB相应为 5 39%和 5 6 8%。
Number born and number born alive were collected from 4269 litters of mixed farrowing sows,in which 12 breeds or crossbreecling combinations were involved.For pure breeds Sichuan Swine dam I(I) ranks first in litter size,the local breed (B),Duroc(D)and Landrace(L)second,Yorkshire(Y)third.Their number bom and number born alive per litter are 11 61 and 10 71,10 86and 10 06,10 07and 9 33,9 85 and 9 26,9 34 and 8 87 heads ,respectively.For 2-way crossbreeding sows the combinations DL,DI,YI and DY get the first places,YL,YB the second.Their correspinding traits are 11 49 and 10 80,11 48 and 10 38,11 36 and 10 45,10 89 and 10 89,10 27and 9 65,respectively.The average hybrid vigor of 2_way sow in mumber born and number born alive are 8 26% and 9 41%,among which DL,DI and DY are 11 14% and 13 13%,and 5 39% and 5 69% for YI,YL, and YB.
出处
《四川畜牧兽医》
2000年第B07期31-32,35,共3页
Sichuan Animal & Veterinary Sciences
