瘦肉猪抗应激品系的选育与配套研究
Acta Agriculturae Boreali-Occidentalis Sinica(2012)
Abstract
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。
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Key words
Anti-stress line,Lean meat percentage,Hal gene,Selection
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