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258360

GENETIC STUDIES ON YOLK AND PLASMA CHOLESTEROL CONCENTRATION IN A LOCAL LAYING HENS STRAIN 2- CORRELATED RESPONSE OF REPRODUCTIVE TRAITS

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Last updated: 04 Jan 2025

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Abstract

The present experiment was conducted throughout five successive generations to decrease the egg yolk cholesterol concentration in local strain, selected for egg production traits. Cholesterol and total lipids concentration for egg yolk and plasma were determined and reproductive traits were taken to calculate the correlated response for low level of egg yolk cholesterol content. Fertility and hatchability percentage, age and body weight at sexual maturity, egg number, egg weight and egg 'mass during the first 90 days of laying estimated the h2, for these traits. The main results obtained could be summarized as follows: Selection for low level of egg yolk cholesterol content decreased both hatchability percentage and body weight at sexual maturity by 196% and 0.07 g, respectively, after four generations of selection, but, increased age at sexual maturity, egg number, egg weight and egg mass by 6.7 day, 4.27 egg, 1.59g and 260.62g, respectively. The heritability for age and body weight at sexual maturity, egg number, egg weight and egg mass during the first 90 days of laying were 0.19, 0.32, 0.05, 0.12 and 0.11, respectively, for selected line, while, the corresponding estimates for control line were 0.51, 0.34, 0.47, 0.13 and 0.18, lespectively.

DOI

10.21608/ejar.2004.258360

Authors

First Name

MOHAMED A.

Last Name

KOSBA

MiddleName

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Affiliation

Animal Production Research Institute, Agricultural Research Center , Ministry of Agriculture, Dokki, Giza, Egypt

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First Name

MAGDA M.

Last Name

BALAT

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-

Affiliation

Animal Production Research Institute, Agricultural Research Center , Ministry of Agriculture, Dokki, Giza, Egypt

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Orcid

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First Name

MOHAMED

Last Name

BAHI EL-DEEN

MiddleName

-

Affiliation

Faculty of Agriculture, Alexandria University, Alexandria, Egypt

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First Name

HANAN H.

Last Name

GHANEM

MiddleName

-

Affiliation

Animal Production Research Institute, Agricultural Research Center , Ministry of Agriculture, Dokki, Giza, Egypt

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Volume

82

Article Issue

2

Related Issue

36510

Issue Date

2004-07-01

Receive Date

2003-12-30

Publish Date

2004-07-01

Page Start

845

Page End

856

Print ISSN

1110-6336

Online ISSN

2812-4936

Link

https://ejar.journals.ekb.eg/article_258360.html

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https://ejar.journals.ekb.eg/service?article_code=258360

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24

Type

Original Article

Type Code

1,041

Publication Type

Journal

Publication Title

Egyptian Journal of Agricultural Research

Publication Link

https://ejar.journals.ekb.eg/

MainTitle

GENETIC STUDIES ON YOLK AND PLASMA CHOLESTEROL CONCENTRATION IN A LOCAL LAYING HENS STRAIN 2- CORRELATED RESPONSE OF REPRODUCTIVE TRAITS

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Article

Created At

22 Jan 2023