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ESTIMATION OF GENETIC PARAMETERS FOR SOME EGG PRODUCTION TRAITS IN THREE GENERATIONS OF CROSSING SOME LOCAL STRAINS WITH TWO COMMERCIAL LINES OF LAYING HENS

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Last updated: 22 Jan 2023

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Abstract

The current investigation was undertaken to study the effects of generation, hatch and genotype; to estimate the components of genetic variance and heritability and to determine the best cross within each generation based on multiple egg production traits. This information helps breeders to employ suitable breeding methodology for obtaining the parental groups for producing a commercial egg-type breed of chicken characterized by good productivity. Animal model analyses under both additive and dominance models were used to estimate the additive and dominance components of genetic variance. Best linear unbiased prediction (BLUP) was used for predicting the best cross for egg production traits. The local sire strains were (Silver Montazah, Baheij, Matrouh, Mandarah and Golden Montazah) together with two commercial dame lines (Lohman Brown and Lohman Selected Leghorn) were used in this experiment. The results showed clearly that all egg production traits in this study showed statistically insignificant differences under fixed effects of generations, hatches and genotypes. Contrarily, egg production traits were largely affected by the interactions generations x genotypes and generation x hatch x genotype. Moreover, the egg production traits in the first and second generations were genetically controlled by additive and dominance genetic variations, while in the third generation only dominance genetic variance was accounted a major part of the total genetic variance for all egg production traits studied. Consequently, heritability estimates in this study were low to moderate for egg production traits.

DOI

10.21608/epsj.2014.5367

Keywords

animal model, Additive, Dominance, local chicken & commercial dame lines

Volume

34

Article Issue

4

Related Issue

914

Issue Date

2014-12-01

Receive Date

2018-02-16

Publish Date

2014-12-01

Page Start

939

Page End

957

Print ISSN

1110-5623

Online ISSN

2090-0570

Link

https://epsj.journals.ekb.eg/article_5367.html

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https://epsj.journals.ekb.eg/service?article_code=5367

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2

Type

Original Article

Type Code

493

Publication Type

Journal

Publication Title

Egyptian Poultry Science Journal

Publication Link

https://epsj.journals.ekb.eg/

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Article

Created At

22 Jan 2023