| Titles |
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English :
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Different methods for evaluation performance traits of Egyptian buffaloes
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Arabic :
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طرق مختلفة لتقييم الاداء الانتاجى في الجاموس المصرى
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| Abstract |
A total of 1400 records of Egyptian Buffaloes kept at three Farms i.e. Mehallet mousa , Sides and Gimmeza, belonging to Ministry of Agriculture, during the period form 1985 to 2004 were used in this investigation. Genetic and phenotypic parameters of total milk yield (TMY), lactation period (LP) and calving interval (CI) were estimated by two methods i.e. Best linear unbiased prediction (BLUP) and MTDFREML using an animal model. The model included individual, and error terms as random effects, Farm, season and year of calving and parity as fixed effects and ageat first calving and days open as a covariate.
Estimates of heritability were 0.16,0.35 and 0.49 for TMY, LP and CI, respectively. Predicted cows breeding values (CBV's) ranged from -214 to 410 kg for TMY, -29 to 29d for LP and -36 to 30 for CI. Also, predicted sires breeding values (SBV'S) ranged between -293 to 173kg,- 63 to 69d and -37 to 40d, for the same traits, respectively estimated by (BLUP). But by animal model were (CBV'S) ranged form -533 to 547kg for TMY,-89 to 96d for LP and -71 to 72d for CI, reflectively, while (SBV'S) ranged between -246 and 261 kg, -44 and 43d and -35 and 36d , for the same previous traits, respectively.
The accuracy of (SBV'S) ranges from 30-46% ,while, (SBV'S) ranges from 2577% estimates by (BLUP). But, the accuracy of (SBV'S) ranges from 54-87% , while (SBV'S) ranges from 24-87% estimated by animal model.
The results to conclude that using the multiple - trait analysis is recommended to obtain more accurate breeding values for TMY because it make use of all the information about the lactations and the covariances among them as well as relationships between the relatives in the different traits.
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| Publication year |
2006
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| Pages |
7009-7017
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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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| City |
المنصورة
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| serial title |
Journal Agricultural Science Mansoura University
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| ISSN |
1110-0346
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| Author(s) from ARC |
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| Agris Categories |
Animal husbandryAnimal physiology - Nutrition
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AGROVOC
TERMS |
Breeding value.
Evaluation.
Milk yield.
Parturition interval.
Water buffaloes.
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| Proposed Agrovoc |
lactation period;
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| Publication Type |
Journal
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