摘要
杜洛克猪新品系采用不完全封闭的群体继代选育法选育，于１９９１年开始组建基础群，一年一个世代，至今已完成４个世代的测定与选择，各项性能指标已达到育种目标。初产母猪窝产仔数为９１９头，经产母猪窝产仔数为１０６头，场内测定日增重公猪为７５４５ｇ，每增重１ｋｇ耗料为２８ｋｇ，母猪日增重为７１５６ｇ，每增重１ｋｇ耗料为２８９ｋｇ。广东省种猪测定中心测定，日增重公猪为８３４ｇ，每增重１ｋｇ耗料为２１６ｋｇ，母猪日增重为８０５ｇ，每增重１ｋｇ耗料为２３８ｋｇ。胴体瘦肉率为６５％左右。作为终端父本与长大、大长杂交配套利用，表现了良好的配合力，杜长大及杜大长商品猪测定期日增重可达９０６ｇ。
Selected new strains of Duroc by partial-closure selection on generation substitution. a base group was established in 1991. Each year 1 generation was selected, and so far 4 generation have been selected and tested. All the tested indexes were up to the repuired criteria. The litter size on averate is 9.19 and 10. 6 for gilts and sows spectively. Daily weight gain tested within the farm are 745.5 and 715.5g for boar and sows respectively, which respectively are 834 and 805g texted by Guangdong Provincial Pig Testing Centre. Feed consamption per kg of live weight gain are 2.80 and 2.89 kg for boars and sows respectively, which are 2.155 and 2,38 kg tested by Guangdong Provincial Pig Testing Centre. Carcass lean content is 65%. When used as terminal sire in crosses with LW × Landrace LW, the new Duroc sires expressed excellent compatibility. Daily live weight gain of the commercial Duroc × LW × Landrace or Duroc ×Landrace × LW within the testing period reached 906 g.
出处
《华南农业大学学报》
CAS
CSCD
北大核心
1997年第A00期79-84,共6页
Journal of South China Agricultural University
基金
广东省"八五"攻关项目
关键词
猪
杜洛克猪
新品系
选育
日增重
饲料
瘦肉率
new strains of Duroc
partial closure population selection
daily weight gain
feed efficiency
lean percentage
