| Titles |
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English :
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Estimation of sire and paternal grand dams breeding values for growth traits in new zealand white and californian rabbits using the animal model
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Arabic :
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تقدير القيم التربوية للأباء و أباء الأمهات لصفات النمو لأرانب النيوزيلندي و الكاليفورنيا باستخدام النموذج الحيواني
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| Abstract |
A total of 2257 bunnies of New Zealand White ( NZW) and 1748 of Californian (CAL) weaned rabbits were used to evaluate genetically the growth performance of these two exotic breeds raised in adverse environment of these two exotic breeds raised in adverse environment. Postweaning body weights at 5, 6, 8, 10 and 12 weeks and livability at the intervals of 5-6, 6-8, 8-10 and 10-12 weeks were studied, variance components and heritabilities (h2) were estimated. Breeding values for growth traits were also estimated for sires and paternal grand dams using an animal model. Heritabilities in CAL rabbits were generally higher than those in NZW. Estimates of h2 in NZW ranged from 0.228 to 0.718 for body weights and from 0.002 to 0.112 for livability, while the respective estimates in CAL ranged from 0.266 to 0.552 and from 0.055 to 0.177. The ranges in estimates of sire breeding values (SBV) for body weights at 5, 6, 8, 10 and 12 weeks of age were 161, 111.4, 134.4, 419.8 and 660 grams in NZW rabbits and 216.1, 181.4, 213.5, 415.2 and 465.4 grams in CAL rabbits, respectively. For livability, the ranges in SBV were 2.0, 15.8, 3.6 and 0.8% at 6, 8, 10 and 12 weeks of age in NZW and 7.6, 25.2 and 8.2% at 6, 8 and 12 weeks in CAL rabbits, respectively. Generally, ranges in estimates of SBV recorded by CAL rabbits were relatively higher than those recorded by NZW rabbits for most body weights, while the reverse trend was observed for livability. Ranges in estimates of breeding values for paternal grand dams were lower than those obtained for sires themselves for most traits.
Keywords: Rabbits, growth traits, heriabilities, breeding values, sires, paternal grand dams.
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| Publication year |
2001
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| Pages |
103-114
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| Availability location |
معهد بحوث الانتاج الحيوانى- شارع نادىالصيد- 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 |
Egyptian Journal of Rabbit Science
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| Author(s) from ARC |
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| External authors (outside ARC) |
ماهر حسب النبى خليل
جامعة بنها
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| Agris Categories |
Animal husbandry
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AGROVOC
TERMS |
Animal models.
Breeding value.
Dams.
Fathers.
Growth.
Rabbits.
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| Publication Type |
Journal
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