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Dr. Mahmoud Mostafa El-Sayed Hussein El-Attrouny :: Publications:

Correlated Responses to Short-term Selection for Egg Production Traits in Japanese Quail
Authors: Mahmoud M El-Attrouny, Mahmoud M Iraqi
Year: 2020
Keywords: Japanese quail, selection, egg production, genetic parameters, predicted breeding value, genetic trend, correlated response
Journal: Asian Journal of Poultry Science
Volume: 14
Issue: 2
Pages: 24-31
Publisher: Science Alert
Local/International: International
Paper Link: Not Available
Full paper Mahmoud Mostafa El-Sayed Hussein El-Attrouny_24-31 (1).pdf
Supplementary materials Not Available

Background and Objective: Poultry industry aims mainly to produce genetically superior animals with high productivity of egg and meat. On a commercial scale, the purpose of most quail genetic improvement programs is to select genetically superior birds for meat and egg production. The objective of this study was to investigate the effect of short-term selection through four generations of selection in Japanese quail on egg number at the first 90 days of laying, estimate genetic parameters of egg production traits and estimate the correlated response to selection. Materials and Methods: Data of 1,352 female Japanese quails were collected through five consecutive generations (base and four selected generations) to estimate genetic gain, depending on breeding values, for Age at First Egg (AFE), Body Weight at Sexual Maturity (BWSM), Weight at First Egg (WFE), Egg Number at first 90 days (EN90D) and Average Egg Weight (AEW). Results: Estimates of heritability for egg production traits were ranged from 0.17 to 0.26. Moreover, positive genetic correlations were detected (0.18 to 0.43) between all studied egg production traits, except the correlation between AFE and EN90D (-0.32). The contrast among estimates was significant (p

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