New Zealand White Rabbits bulp values for post-weaning individual body weight under Egyptian conditions
Abstract: Genetic parameters of New Zealand White (NZW) growth traits were estimated, using Multi-Trait Derivative-Free Restricted Maximum Likelihood (DFREML). A total of 962 individual live body weight at 5 (W5), 8 (W8) and 10 (W10) weeks of age were considered for the evaluation. The animal model analysis included parity (P), sex (S) and year season (Yr S) as fixed effects as well as animals and common litter as random effects. Heritabilities of considered body weights were somewhat moderate being 0.23, 0.36 and 0.38 for W5, W8 and W10, respectively. Common litter effects were low but 10 times higher for weights at earlier ages W5 and W8 (0.007) than that for later ones W10 (0.0007). The ranges for the top 30 % ranked sires were 63 g., 48 g., and 62 g. for W5, W8 and W10, respectively. However, it were 71 g., 57 g. and 70 g. for the top 30 % ranked dams. The product moment correlation coefficient concerning sire breeding value and the spearman correlation coefficient concerning ranks of sire breeding value was lower for coefficients between 5 and 8 weeks compared with the higher and significant ones between 8 and 10 weeks of age. The accuracies (ruû) of minimum and maximum estimates of predicted breeding vale (PBV) were mostly higher in W8 (71 to 73%) than W5 (60 to 68%) and W10 (58 to 68%).
Key words: breeding values, heritability, correlation.
Publication year 2004
Availability location معهد بحوث الانتاج الحيوانى - شارع نادى الصيد - الدقى - الجيزة
Availability number
Organization Name
City Puebla City
serial title 8th World Rabbit Congress, Convention, Puebla City -Mixico, Septemper 7-10,
Author(s) from ARC
Agris Categories Animal husbandry
AGROVOC
TERMS		 Body weight. Egypt. Heritability. Postweaning period. Rabbits.
Proposed Agrovoc breeding values;correlation;
Publication Type Journal
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