Genetic parameter estimation and model selection for hot carcass weight in matebele goat
Journal Title: Scientific Journal of Biological Sciences - Year 2012, Vol 1, Issue 1
Abstract
Genetic parameter estimation for simple carcass traits has been confined to the improved goat breeds worldwide unlike in the unimproved breeds in developing countries where goats are numerous. Variance components for additive direct, additive maternal, permanent environmental maternal effects, the covariance between additive direct and maternal effects were estimated by restricted maximum likelihood, fitting five animal models from 2341 ( 1359 males; 982 females) hot carcass weight pedigree records collected over a period of 13 years (1984- 1997) of indigenous Matebele goat of Zimbabwe. All investigated models included a random direct genetic effect, but different combinations of random maternal genetic and permanent environmental maternal effects as well as direct-maternal genetic covariance. The analytical models included fixed effects of sex, age at slaughter and year of slaughter. The direct heritability (h2a) ranged from 0.14 to 0.26 when the maternal genetic effects were included in the model, whereas h2a estimate was 0.26 when maternal effects were excluded. The maternal heritability (h2m) was 0.00 when only maternal genetic effects were included in the model and were 0.05 and 0.10 when the permanent environmental effect of the dam was added. The permanent environmental effect of the dam was negligible. A positive covariances between direct and maternal genetic effects (σ2am ) was observed when maternal genetic effects and permanent environmental maternal effects were accounted for in the model. A simple animal model with direct additive genetic effects as the only random effects other than the residuals was the best model for genetic evaluation of hot carcass weight in indigenous Matebele goat.
Authors and Affiliations
N. Assan| Department of Agriculture, Faculty of Science, Zimbabwe Open University, Bulawayo, Zimbabwe
Keywords
Related Articles
- EP ID EP1056
- DOI -
- Views 637
- Downloads 53
Fertility and hatchability characterization of three strains of egg type chickens
The fertility and hatchability characteristics of three popular strainsof egg type chickens in Nigeria, namely chickens (ISABROWN), Alpha (Improved native) and the local strain (Pure native) chickenswere studied. They we...
Xylinasic and amylasic activities of some microorganisms in the digestive exudate of termites (Macrotermes Subhyalinus and Macrotermes Bellicosus)
Termites areterrestrial insects involved in the degradation of complex substances such ascellulose and hemicellulose found into the plant. They thus influence soilproperties and contribute to the emission of methane gas...
Effect of canola oil on blood lipid in ostriches (Struthio camelus)
In order to study the lipid profile of ostriches in relation to diet, 6 blue-neck male ostriches (Struthio camelus) were used and fed with 3% canola oil supplement on diets adlibitum consisting. In the morning, after abo...
Study of genetic variation and phenetic relationships in some vulnerable taxa from Indian sundarbans following RAPD marker analysis
The mangrove ecosystem plays an important role in maintaining coastal ecological balance and is also one of the most highly productive and dynamic ecosystems to mankind, providing food, livelihood and ecological security...
Post intervention assessment of long lasting insecticde nets (LLINs) distributed in Kano metropolis, Kano state, Nigeria
Kano state hasdistributed about 4,137,464 Long Lasting Insecticide Treated Net (LLINs) in2009 being one of the main malaria vector control strategy developed by theNigeria Federal Ministry of Health (FMOH) which is in li...