瘦肉猪高产仔母系(Ⅰ系)选育进展初报  

PROGRESS OF BREEDING ON FEMALE LINE (I-LINE) OF LEAN TYPE PIG WITH HIGH FARROWING RATE

作　　者：林小伟[1] 

机构地区：[1]四川省畜牧兽医研究所高产仔母系选育组,四川省畜牧兽医研究所成都610066

出　　处：《西南农业学报》1993年第2期93-97,共5页Southwest China Journal of Agricultural Sciences

摘　　要：瘦肉猪高产仔母系(Ⅰ系),是经过8年的群体继代选育,正逐渐形成有一定数量、体型外貌基本一致,遗传性状较稳定的专门化母系。目前选育工作已进行到第三世代,据测定,Ⅰ系猪已具有较高的性能水平,尤以繁殖性能为优,二世代母猪初产仔数达11.4头,二产仔数达12.5头,较之本省现有地方品种的产仔数明显提高;三世代肥育猪196.3日龄体重90kg,日增重569g,耗料指数3.44,胴体瘦肉率53.5％,主要肉质指标正常;与杜洛克猪配套生产的杂优猪,胴体瘦肉率达58％以上。具有产仔多、生长快、耗料省、瘦肉率高、肉质好、杂交优势明显的特点,是生产商品瘦肉猪的理想母本。A specialized strain of female line (I-line) of lean type pig with, high farrowing rate was breeded by means of crossbreeding and population selection from generation to generation for eight years. I-line with large scale, united physical type appearance basically and stabilized genetic ability were formed. In presence, selection of I-line was from the third generatiom, they were with higher production ability by testing, especially fertility was the best, litter size at birth of the second generation sow was 11.4, the next one was 12.5, then it's more significantly rised than local breed one; Body weight, daily gain, feed efficiency index and carcass lean percent of the third generation fattening pigs in 196.3 days was 90kg, 569g, 3.44, 53.5% respectively. The main pork quality indexes were normal. Carcass lean percent of the hybrid (I-line x Duroc pig) was up to 58%. Meanwhile, because of the I-line had many good characters such as more litter size, growing rapidy, less feed efficiency index, higher lean percent, better pork quality and more significant hybrid heterosis, so it is a better female parent line in current.

关 键 词：猪 瘦肉型 仔猪 育种 

分 类 号：S828.2[农业科学—畜牧学]