Genetic Parameters Estimation and Trends for Birth Weight in Cattle
作者： N Assan
DOI:
关键词: Selection (genetic algorithm) 、 Trait 、 Biology 、 Animal science 、 Birth weight 、 Correlation 、 Heritability 、 Genetic variation 、 Estimation 、 Maternal effect
摘要: In this study data on birth weight (BWT) of local Tuli calves collected from 1988- 1997 at Matopos Research Station, located in Bulawayo, Zimbabwe were analyzed. A single trait animal model was fitted allowing for genetic maternal effects and a covariance between direct effects. Estimates heritability (h²A), (h²M), the as proportion total variance (cAM) weaning were, 0.25, 0.14, -0.06, respectively. Direct additive twice larger than variance. The correlation negative implying selection be directed both components considering estimate which moderate. natures environmental values suggest that not depressed by tropical harsh semi arid conditions.
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