| Titles |
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English :
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Selection for uniformity in Alexandria local chickens 2-Correlated response for productive and reproductive traits
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| Abstract |
Four lines of Alexandria strain were used; selected egg line (EL). selected meat line (ML) and their controls ( CEL& CML). The present study was performed for propose of increasing uniformity in Alexandria chickens. Eight weeks body weight and also age of sexual maturity were estimated in all populations. In the meat line selection was done for increasing uniformity for eight weeks body weight so the female chicks which in range (x- ± S.D.) and the male chicks which in range (x- ± 0.5 S.D.), where were chosen as parents for the next generation and all chicks above or lower than these ranges were discarded. While in the egg line selection was done for increasing uniformity for age sexual maturity so the layers which in range (x = S.D.), where were chosen as dams for the next generation and all lavers above or lower than this range were discarded. Males which will be the sires were taken at random he males and females of each control line were taken at random from their population.
The main results and conclusions are summarized as follow:
1.Negative correlated responses were observed in fertility percentage.
hatchability percentage of fertile eggs and body weight at hatch day four and eight weeks of age in males and females. The selection for uniformity did not improve these traits.
2. There are negative correlated response for uniformity selection on body weight at sexual maturity in E.L. (-56.4gm.) While it was highly positive in the ML (249.3gm.).
3.Age at sexual maturity improved as a result of uniformity selection in the two lines (-5.52 and 4.15 in E.L. and M.L. respectively).
4. The duration period of laying the first 10 eggs was increased by 1.8 and 2.1 days as a result of one generation of uniformity selection.
5. The average weight of the first 10 eggs was decreased by -0.3 and -2.9 gm. in the E.L. and M.L. respectively.
6.The egg number during the first 90 days of laying was increased by 2 and 10.3 eggs in the E.L. and M.L. respectively.
7. 1n present study the overall averages of fertility percentage (F%). hatchability percentage (H%) body weight at hatch (BWH) at four weeks (BW4). at eight weeks (BW8). at sexual maturity (BWSM) age at sexual maturity (ASM) duration period of laying the first 10 eggs (P10FE).
average egg weight of the first 10 eggs (W 10FE) and egg number during
the first 90 days of laying (EN90D) were 88.11% 51.95%. 30.19 gm.
209.9 gm. 540.24 gm. 1553.3 gm. 159.68 days. 13.7 days. 36.8 gm and
53.7 eggs respectively.
8. Analysis of variance showed that the differences between two generations were significant only for F% BWSM and EN90D. The differences between four lines were insignificant for all traits interaction effect GxL showed highly significant for all traits expect F% and BW8.
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| Publication year |
2010
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| Pages |
114-136
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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.
Egg hatchability.
Fertility.
Production.
Reproduction.
Selection.
Selection responses.
Sexual maturity.
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| Proposed Agrovoc |
uniformity;egg line;meat line;
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| Publication Type |
Journal
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