Threshold model for analyzing the trait in young (baby) New Zealand white rabbits
Abstract: A total of 2590 records (1592 live and 998 dead rabbits) of livability (LTV), weaning weight (WWT) and average daily gain from birth till weaning weight (ADG) of rabbits as growth traits were obtained from 142 (96 dams and 46 does) exotic New-Zealand White (NZW) having 344 litters and 18 sires, raised at the experimental farm belonging to animal production research institute (APRI).
Records were analyzed to obtain variance and (co) variance components of livability trait using Gibbs Sampling, WWT and ADG using MTDFREML procedures. The livability single trait analyzed using threshold animal model, while, WWT and ADG multi-traits were analyzed using animal model with the flat distribution. The Models included litter size at birth (lsb), weight of doe at conception, month of birth, year of birth and parity as fixed effects for (LTV) trait add to sex effect for WWT and ADG .The random effects in the models were additive genetic, maternal and permanent environmental effects.
Gibbs Sampling (GS) heritability estimate for binary trait (LTV) was 0.44. The variances due to maternal and permanent environmental effects were 0.48 and 0.001 as a Proportion of phenotypic variance, respectively. The correlation between direct genetic and maternal effect was -0.25.
MTDFREML heritabilities estimates for (WWT) and (ADG) were 0.55 and 0.75, respectively. The variance due to maternal and permanent environmental effects as a proportion of phenotypic variance for WWT and ADG were 0.41, 0.30, .52 and .03, respectively. The correlation between WWT and ADG was 0.99.
Publication year 2004
Pages 1403-1413
Availability location معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- الدقى - الجيزة
Availability number
Organization Name
serial title Egyptian Journal Agricultural Research
Author(s) from ARC
External authors (outside ARC)
    عما د فهمى احمد موسى جامعة اسيوط
Agris Categories Animal husbandry
AGROVOC
TERMS		 Mothers. Rabbits. Weaning weight. Weight gain.
Proposed Agrovoc Threshold model;livability;MTDFREML procedures;threshold animal model;additive genetic;permanent environmental effect;
Publication Type Journal
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