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Estimation of Phenotypic and Genetic Parameters for Productive, Reproductive and Morphometric Traits in Sudanese Rabbits

Estimation of Phenotypic and Genetic Parameters for Productive, Reproductive and Morphometric Traits in Sudanese Rabbits

Khalid Mohammed Elamin ([email protected])
Animal Breeding, University Of Gezira
January, 2011
 

Abstract

Abstract
This study was carried out in the Rural Development and Extension Centre, Faculty of Animal Production at El Managil, University of Gezira to assess production and reproduction potentialities, genetic and phenotypic parameters of post-weaning body weights and of the morphological linear traits, carcass, meat quality traits, serum chemical characteristics and pre and post- weaning mortality in local rabbits. Twenty male and sixty female rabbits were used as the foundation stock to obtain the first and second generations whose data were used in this study. The first and second generations were reproduced from one hundred and twenty nine and fifty two litters respectively. The results showed that production and reproduction potentialities were very low, but similar to those of many local breeds. Seasons affected litter size at weaning in first and second generations and litter weight in the second generation. This may reveal the possibility improving of them using selection tools. The results exhibited that morphometric equations can be used to predict growth trait with heart girth, body length, height at wither, giving the best prediction. Coefficients of variation for production and reproduction traits in this study were high. The heritability estimates in this study were moderate for growth traits and high to moderate for linear traits. The genetic correlations among growth traits and the genetic correlations of body weight with the other linear traits were high. This indicates that improving growth traits will ultimately result in improving morphometric characteristics. Since heritability estimates and coefficients of genetic correlation were high to moderate in growth traits, genetic improvement for these traits can be achieved by selection firstly then by cross breeding with exotic rabbit breeds.