Genetic analysis of the relationships between some doe litter traits of Hungarian New Zealand white rabbits using random regression model [electronic resource].

Includes references.

The objective of this study is to conduct a random regression producer genetic analysis for three litter traits across different kindling age of rabbit does. The analyzed data incorporated 546 litter records comprised from 71 sires, 177 dams and 283 daughter does of Hungarian New Zealand White (NZW) rabbits. Traits evaluated were litter size at birth (LS0), litter weight at weaning (Lw6) and litter gain at marketing (Lg10). A quadratic random regression was applied for declaring additive genetic variances in all studied traits across several reproductive ages. Overall estimates of heritability were 0.35, 0.12 and 0.17 for LS0, Lw6 and Lg10, respectively. Litter size at birth attained the highest inheritance feature with the least extensive heritability ranges across different kindling ages. Permanent environmental variation affected phenotypic variations markedly in all studied traits specially at weaning age with a value of nearly 0.40 for the studied traits. Analysis of additive genetic relationships between apiece set of two traits revealed low to moderate negative association (-0.18 to -0.38) between Ls0*Lw6 across 12 to 21 months of doe age at kindling, and moderate to high negative association between Ls0*Lg10 (-0.20 to -0.58) across most ages meanwhile there was a general high and positive association between Lw6*Lg10 across most ages.

Summary in Arabic.

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