| Titles |
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English :
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Selection for uniformity in Alexandria local chicken 1- Response to selection
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Arabic :
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الانتخاب للتجانس في دجاج الاسكندرية المحلى 1- الاستجابة للانتخاب
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| Abstract |
Four lines of Alexandria strain were used; selected meat line [ML] selected egg line [EL] and their controls (CEL&CML). The present study was performed for purpose of increasing uniformity in Alexandria chickens. Eight weeks body weight and age at sexual maturity were estimated in the all populations. Bodyweight for chicks at eight weeks was detected in meat line selection for increasing uniformity within the range (x- ± S.D.) for females and (x- ± 0.5 S.D.) for males Selected chicks were chosen as parents for the next generation and all chicks either lower or higher than these ranges were discarded Egg line selection was done for increasing uniformity age at sexual maturity age so the layers which in range (x- ± S.D.) were chosen as dams for the next generation and all layers above or lower than this range were discarded Males which will be the sires were taken at random. The males and females of each control line were taken at random from their population.
The Main Results and Conclusions are Summarized as Follow:
1. The method of selection which used was similar to stabilizing selection so in this experiment there was no selection differential (S) estimated.
2. Over two generations in meat line selection uniformity percent in males is higher than those in females (48.23 vs. 42.22) in the 1st generation and (52.60 vs. 50.72) in the 2nd generation. However actual response to uniformity selection in meat line was 1.5% and 18.32% for males and females respectively after one generation of selection.
3. One generation of selection in egg line selection for uniformity age at sexual maturity increased uniformity from 99.03% to 111.18% based on the percent of their control population. Actual response to selection for uniformity of age at sexual maturity was 7.79% after one generation of uniformity selection.
4. The heritability estimates for body weight at 8 weeks (BW8) were (0.18, 0.08, 0.1 and
0.74 for E.L., C.E.L., M.L. and C.M.L., respectively) based on sire plus dam component of variance.
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| Publication year |
2009
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| Pages |
1157-1171
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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 |
الاسكندرية
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| serial title |
Egyptian Poultry Science
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| ISSN |
1110-5623
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| Author(s) from ARC |
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| External authors (outside ARC) |
محمد كسبة
جامعة الاسكندرية
حسن زويل
جامعة الاسكندرية
محمد احمد حسن
جامعة الاسكندرية
سمر شبارة
سابا باشا -جامعة الاسكندرية
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| Agris Categories |
Animal husbandry
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AGROVOC
TERMS |
Chickens.
Heritability.
Selection.
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| Proposed Agrovoc |
uniformity;local chicken;meat line;egg line;
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| Publication Type |
Journal
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