新西兰白兔生长性状的遗传参数估计

摘要

Obj ective Genetic analyses were carried out for different daily weight and average dai-ly gain of New Zealand white rabbit•[Method]Data of New Zealand white rabbit were collected from Chengdu Aihua farm animal technology limited company from 2011 to 2013•And genetic pa-rameters were estimated for 35,42,56,72,84 d weight and 35-42,42-56,56-70,70-84 d average daily gain by multi-trait animal model with REML algorithm•[Results]The heritabilities of 35,42,56,70,84 d weight were 0• 63,0• 46,0• 43,0• 42,and 0• 39 respectively•The weights appeared strongly positive genetic correlations to each other,while genetic correlation were stron-ger between two closer weights than others•The heritabilities of 35-42,42-56,56-70,70-84 d average daily gain (ADG)were 0• 30,0• 36,0• 31,and 0• 21 respectively•There were weak genetic correlations among different ADGs•[Conclusion]It is a work that provides basic theoreti-cal parameters for New Zealand white rabbit breeding.%【目的】对新西兰白兔不同生长日龄体重和平均日增重进行遗传分析。【方法】利用成都市爱华畜牧科技有限公司种兔场2011-2013年的生长性状记录，采用多性状动物模型约束性最大似然法（REML）对新西兰白兔35、42、56、70、84日龄的5个体重性状，35～42、42～56、56～70、70～84日龄的4个平均日增重性状进行遗传参数估计。【结果】结果表明，新西兰白兔35、42、56、70、84日龄体重的遗传力分别是0•63、0•46、0•43、0•42、0•39。各日龄间体重呈强正遗传相关，相邻日龄间的遗传相关较其他日龄间强。35～42、42～56、56～70、70～84日龄平均日增重的遗传力分别是0•30、0•36、0•31、0•21。4个平均日增重间呈弱遗传相关。【结论】为新西兰白兔育种方案的制定和选育工作提供了理论基础。