应用BLUE法估测瘦肉型猪杂交亲本的配合力

ESTIMATION OF COMBINING OF CROSSING PARENTS OF THE BACON-TYPE PIGS BY BLUE

本文根据纯种八眉、关中黑和巴克夏猪及以八眉、关中黑为母本,杜洛克、长白、巴克夏为父本的二三元杂交猪的3次肥育试验资料(N=144),应用BLUE法,研究杂交亲本配合力的估计。结果表明,肥育期平均日增重(ADG)、饲料利用效率(FU)和90公斤屠宰时胴体瘦肉率(L％)、脂肪率(F％)、背膘厚(BFT)等性状的群体平均遗传效应的BLUE值分别为525.2121克,4.1244,54.1675％,25.6107％和2.6399厘米。一般配合力组分对杂种的L％、BFT和ADG有极显著(P<0.01)的影响,对F％和FU有显著(P<0.05)的影响;特殊配合力组分对L％、BFT和ADG亦有极显著的影响,对F％有显著的影响。

According to the data of three fatteniag experiments (N=144) with Bamei /Guan zhong Black and Berkshire as well as two and three-way crossbred pigs produced from matigu among the Banaei and Guanzhong Black breeds as the female pareat liaes and Duroc/Landr-ace and Berkshire as the male parent lines, the combining ability of crossing parents were estimated by BLUE.The results show that the value of BLUE of population mean of genetic effects for average dailv gain weight (ADG) , utilization of feeds (FU) during the fattening period, lean pecentage (L%) , fat percentage (F%) and backfat thi-ckness (BFT) of careass at the body weight of 90kg when the individ uals were slaughtered were 525.2121g, 4.1244, 54.1675%, 25.6107% and 2.6399cm resp.General combining ability was a aighly sigaificant (P< 0.01) source of variation ior L%, BFT and ADG and a significant (P <0.05) that ior F% and FU. Specific combininC ahiiity was a highly significant source of variation for L%, BFT and ADG as well, and a significant that for F%.