Abstract
Complete diallel experiment was carried out involving three rabbit breeds (Chinchilla {CHC}, New Zealand White {NZW} and Californian White {CAW}). Data on post weaning average body weight gain were analysed by complete diallel analysis after first been corrected for significant effects of season of birth and sex of animal using the least squares constants. The variations due to general combining ability (GCA) as well as specific combining ability (SCA) were highly significant (P 0.01) indicating absence of maternal effect. The GCA effect was positive and considerably high for CHC and NZW but negative for CAW. The crosses of NZW and CHC with CAW rabbit had positive and high SCA effect. The findings from this study further revealed positive GCA effect in the two breeds (NZW and CHC) in respect of post weaning growth performance up to 90, 120 and 150 days of age. This was contrary to the negative GCA effect in CAW breed. The results suggested that the growth performance of NZW and CHC breeds far exceeded that of CAW breed of rabbit. When crossed with CAW breed, NZW and CHC showed positive SCA effects for the tested trait. On the basis of these findings, crossbreeding of CAW with NZW as well as with CHC was advocated.
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