| Titles |
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English :
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Varainace of direct and maternal genetic effects for milk yield in Egyptian buffaloes
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| Abstract |
A total of 1250 normal lactation records of Egyptian buffaloes raised at Mehallet Mousa Experimental Station, belonging to Ministry of Agriculture were used to estimate variances from direct and maternal genetic effects. Data were analyzod by using multiple Trait. Derivative Free Restricted Maximum Likelihood (MTDFREML). Two single trait animal model were used. Model 1 included month and year of calving as fixed effects and age at first calving as a covariate, direct genetic (o2 g), maternal genetic (o2 m), covariance between direct and maternal (o gm) and errors as a random effects, whi1e model 2 is similar to model l, but excluding o2 g and o gm. Estimates of horitabillty (h 2) for total milk yield are 0.30 and 0.21 from model 1 and model 2, respectively. The removal of o 2g and o gm from the model decreased h 2 estimates of additive genetic effects by 0.09. Predicted breeding values of cows, sires and dams for total milk yield from model 1 are calculated. The accuracy of sire breeding values are higher than those of cows and dams.
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| Publication year |
2004
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| Availability location |
معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- الدقى - الجيزة
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| Availability number |
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| Organization Name |
Animal Production Research Institute (APRI)
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| serial title |
Buffalo Newsletter
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| Author(s) from ARC |
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| External authors (outside ARC) |
عادل صلاح خطاب
جامعة طنطا
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| Agris Categories |
Animal husbandry
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AGROVOC
TERMS |
Milk yield.
Water buffaloes.
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| Proposed Agrovoc |
maternal genetic effects;direct genetic effects;
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| Publication Type |
Journal
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