按家系分组湘村黑猪的繁育性能分析

Study on Reproductive Performances of Xiangcun Black Pig Grouped by Families

应用国家级审定品种湘村黑猪初产0～5世代660窝、经产1～5世代415窝测定数据,分析繁殖与哺育性能,结果表明,初产、经产主要繁育性状群体均值分别为：1）总产仔数、产活仔数分别为11.11头、13.18头和10.32头、12.86头;2）初生窝重、21日龄窝重、70日龄窝重分别为11.55 kg、42.03 kg、172.29 kg和14.53 kg、56.06 kg、232.91 kg;3）21日龄、70日龄育成仔数分别为9.86头、9.45头和12.14头、11.79头;4）21日龄、70日龄育成率分别为95.90%、91.93%和95.68%、92.89%。除初产总产仔数、经产21日龄育成率家系间差异显著（P〈0.05）外,其他性状家系间差异均不显著（P〉0.05）;5）主要繁育性状,除育成率产次间差异不显著（P〉0.05）外,其他性状均差异极显著（P〈0.01）。从总体上反映了湘村黑猪较高繁殖力和较高哺育性能。

This paper studied on reproduction and nursing performance of Xiangcun Black Pig which is a national approved variety by measured data including 660 litters of primiparous sows during 0-5 generations and 415 litters of muhiparous sows during 1-5 generations.The results showed that the main breeding traits＇ mean of primiparous sows and multiparous sows is respectively：l）the total number born,number born alive were 11.11,13.18 and 10.32,12.86;2）initial litter weight,litter weight at 21 d,litter weight at 70 d were 11.55 kgA2.03 kg, 172.29 kg and 14.53 kg,56.06 kg,232.91 kg;3）litter size at 21 d,litter size at 70 d were 9.86,9.45 and 12.14,11.79; 4）rearing rate at 21 d,rearing rate at 70 d were 95.90%,91.93% and 95.68%,92.89%.There were significant differences in the total number born of primiparous sows,rearing rate at 21 d of muhiparous sows between families （P〈0.05）and there＇s no obvious difference in other traits between families （P〉0.05）;5） there were significant differences in the all breeding traits expect rearing rate between families （P〈0.05）.That generally reflects the high reproduction and nursing performance of Xiangcun Black Pig.