| Titles |
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English :
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ESTIMATION OF GENETIC PARAMETERS AND SOME NON-GENETIC FACTORS FOR LITTER SIZE AT BIRTH AND WEANING AND MILK YIELD TRAITS IN ZARAIBI GOATS
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Arabic :
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تقدير المعالم الوراثية وبعض العوامل الغير وراثية لصفات حجم البطن عند الولادة والفطام وانتاج اللبن فى الماعز الزرايبى
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| Abstract |
Data were collected from El-Serw research station belonging to Animal Production Research Institute (APRI) to estimate genetic parameter for Litter Size at Birth (LSB), Litter Size at Weaning (LSW) and Total Milk Yield (TMY) in Zaraibi goats. There were 156 half-sib families over the period 1987-2007 which developed 4784 records obtained from 1770 does, progeny of 156 sires and 924 dams. Analysis of variance and least squares means for the fixed effect were obtained using (SAS, 1999) with GLM procedure. MTDFREML program of Boldman et al. (1993) was used to estimate covariance components. Overall means ± SE for LSB, LSW and TMY were 2.10±0.01 kids, 1.28±034 kids and 253.14±1.5 kg, respectively. Effect of parity, season and year of kidding, litter size and interaction between year and season were significant (p<0.0001) for TMY. Effects of parity, season and year of kidding and the interaction between year and season were also significant (P < 0.0001) for LSB and LSW. Heritability estimates ± SE for the studied traits were; 0.08±0.01 for LSB, 0.05±0.01 for LSW and 0.26±0.05 for TMY, while the repeatability ± SE were 0.15±0.04, 0.09±0.06 and 0.31±0.06 for LSB, LSW and TMY, respectively. Genetic and phenotypic correlations between studied traits were positive and moderate.
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| Publication year |
2009
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| Pages |
55-64
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| Availability location |
معهد بحوث الانتاج الحيواني- شارع نادي الصيد- دقي- جيزة
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| Availability number |
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| Organization Name |
Animal Production Research Institute (APRI)
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| Author(s) from ARC |
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| External authors (outside ARC) |
عادل حامد
مهندس زراعي-بقطر
محمد منير مبروك
جامعة الازهر
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| Agris Categories |
Animal husbandry
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AGROVOC
TERMS |
Birth weight.
Genetic correlation.
Genetic parameters.
Goats.
Heritability.
Litter size.
Milk yield.
Statistical methods.
Weaning.
Weaning weight.
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| Proposed Agrovoc |
repeatability;
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| Publication Type |
Journal
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