猪配套杂交组合肥育性能研究

A study on the fattening performances of several swine crossbreeding combinations

选用杜洛克 (D)、长白 (L)、大约克 (Y)、四川白猪Ⅰ系 (I)和本地猪(B)为杂交亲本 ,设置DI、DL、DY、YI、YL、LY、DYI、DYL、DLY、DLB共1 0个杂交组合 ,每组合选择 8头 ,共 80头试猪参加肥育性能和屠体品质测定 ,计算综合评定指数。DY、DYL、DLY、DYI 4个杂交组合的综合评定值较高 ,其达1 0 0kg重日龄、日增重、耗料指数和胴体瘦肉率分别为 1 5 2 1 5天、 96 7 38g、2 87、 6 3 41 %、 1 71 1 5天、 842 75 g、 2 89、 6 4 40 % ;1 6 7 5 1天、 875 80 g、3 0 2、 6 3 6 1 % ;1 6 8 78天、 845 2 5 g、 2 97、 6 2 1 4%。

Five swine breeds including Duroc(D),Landrace(L),Yorkhire(Y),Sichuan White Dam I(I)and Local pig(B) were selected as crossbreeding parents.Ten combinations were designed,which were DI,DL,DY,YI,YL,LY,DYI,DYL,DLY and DLB.Eight pigs from each combination and 80 heads in total were used to measure their fattening performances and carcass traits,and the comprehensive index were calculated.Combinations DY,DYL,DLY and DYI showed higher indexes than the others.Their days from birth to 100kg,average daily gain,feed conversion ratio and lean meat rate were 152 15days,967 38g,2 87 and 63 41%;171 15days,842 75g,2 89 and 64 40%;167 51days,875 80g,3 02 and 63 61%;168 78days,845 25g,2 97 and 62 14%,respectively.Their major performances ahieved advanced level domestically.