Genetic And Non-genetic Aspects Of The Productive Efficiency Of The Rabbits Doe:

Ahmed Farid Mahmuod Ei-said Hilmy

this study was carried ut at san el-hager agricultural company, san ei-ahager, sharkya govern rate. data, collected on 355 does and 1430purebred litters produced by b, cal and nzw rabbits during two successive years of productio (1992&1993), were used to investigatesome genetic and non-genetic e ects on litter traits (litter size, litter weight and mean bunny weight per i tter at birth, 21 days and at weaning at 30days and gain in litter weight u to 21 days and up to weaning). data wereanalyzed by the mixed model least-squares and maximum likelihoodmean weighted program o:fh ey (1990) and by using an animal modelprogram (single trait) of mi ztal (1988). the most important resultsobtained could be summarized a follows : 5.1 non-genetic factors- parity effects were found t be significant (p