瘦肉猪抗应激品系的选育与配套研究  

Selection and Cross Combination Study on the Anti-stress Lean Pig Line

作　　者：帅起义[1] 熊远著[1] 邓昌彦[1] 

机构地区：[1]华中农业大学动物科技学院,武汉430070

出　　处：《西北农业学报》2012年第2期1-6,共6页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：国家高新技术研究发展计划专项(2002BA514A-1-1);国家科技支撑计划(2006AA10Z1D6);公益性行业(农业)科研专项(nyhyzx07-034)

摘　　要：采用分子标记辅助选择与常规育种技术相结合,以湖北白猪Ⅳ系为基础,培育抗应激品系。经过5个世代的选育,应激敏感基因已彻底清除;品系的各项经济性状达到并超过育种目标的要求。后备公母猪6月龄体质量分别为104.04kg和97.83kg,达90kg日龄分别为164.76d和169.42d,活体背膘厚为1.59cm和1.50cm;经产母猪产仔数达12.82～12.86头;同胞测定猪达90kg日龄166.61d,饲料利用率2.76∶1,胴体瘦肉率61.32%。以抗应激品系为母本,与高瘦肉率的皮特蓝、杜洛克公猪杂交,生产"皮×抗"、"杜×抗"杂优商品猪,达90kg体质量日龄分别为156.59d和160.35d,饲料利用率分别为2.33∶1和2.34∶1,瘦肉率分别为64.09%和64.64%,肌内脂肪分别为2.56%和3.12%,是理想的杂优商品猪生产配套组合。Anti-stress lean pig line was bred by the combination use of molecular-assisted-selection and conventional breeding techniques with Hubei white pig as the basic population.After systematic breeding of 5 generations,stress-sensitive gene has been completely removed.Various economic traits of the anti-stress lean pig line have been reached and exceeded the breeding goal.For boar and gilts of anti-stress line,the body mass at the age of 6 months were 104.04 kg and 97.83 kg and the age reaching 90 kg was 164.76 d and 169.42 d with backfat thickness 1.59 cm and 1.50 cm respectively;and litter size of sows 12.82-12.86 heads.The age reaching 90 kg of sib test was 166.61d with feed conversion rate 2.76,and lean percentage in the carcass was 61.32%.The anti-stress line as female parents,the age reaching 90 kg of hybrids of ＂Pietrain×Kang＂ and ＂ Duroc×Kang＂ was 156.59 d and 160.35 d with feed conversion rate 2.33 and 2.34,lean percentage 64.09% and 64.64%,and intramuscular fat 2.56% and 3.12%,respectively.The results showed that these hybrids were superior cross combinations for pig reproduction.

关 键 词：抗应激品系 选育 瘦肉率 氟烷基因 

分 类 号：S828[农业科学—畜牧学]