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174833

SELECTION FOR SOME PRODUCTIVE TRAITS IN NORFA LAYING HENS.

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Last updated: 04 Jan 2025

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Abstract

The present experiment has been carried out at the Poultry    Experimental Farm of the Faculty of Agriculture, Minufiya University, Shebin El-Kom, Egypt, during the period from 2013 to 2017 on Norfa chickens. Total of 475 dams were used in the present experiment in the base population, first and second generations. Independent culling levels (ICL) method of selection has been applied on the selected flock (x+.5sd). The criterion of (ICL) method of selection was to select hens having at least average EN90 d + 0.5 sd on condition that egg size and body weight should be around the average flock. Results obtained and conclusions can be summarized as follows: - The actual   genetic gains for EN90d and EN42WK were high from the expected genetic changes throw the base population, first and second generations by applied the Independent culling levels.   - The selected line was excellent this of control line for productive traits in Norfa laying hens. - Concerning to phenotypic and genetic parameters, the heritabilites estimates showed that ASM had low h2 estimates, both of BWSM and BWM showed moderate h2 estimates, EWSM showed moderate to high h2 estimates while EWM had moderate h2 estimates and the heritability estimates for EN90d and EN42wk were moderate to high. - Generally, Norfa layers proved to have the advantage of early sexual maturity. -  Norfa layers, in general have moderate egg size and this is mainly due to light body weight. More experiments are needed to increase egg size.

DOI

10.21608/mjapfp.2019.174833

Keywords

selection, productive traits, Norfa

Authors

First Name

F. H.

Last Name

Abdou

MiddleName

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Affiliation

Prof. of Poultry Breeding, Fac. of Agric., Menoufia Univ.

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Orcid

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First Name

M. E.

Last Name

Soltan

MiddleName

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Affiliation

Prof. of Poultry Breeding, Fac. of Agric., Menoufia Univ.

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City

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Orcid

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First Name

A. A.

Last Name

Enab

MiddleName

-

Affiliation

Prof. of Poultry Breeding, Fac. of Agric., Menoufia Univ.

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Orcid

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Volume

3

Article Issue

3

Related Issue

25369

Issue Date

2019-06-01

Receive Date

2021-06-03

Publish Date

2019-06-01

Page Start

105

Page End

106

Print ISSN

2357-0814

Online ISSN

2735-3478

Article File

MJAPFP_Volume 3_Issue 3_Pages 105-106.pdf

PDF . 202.0kB

Link

https://mjapfp.journals.ekb.eg/article_174833.html

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https://mjapfp.journals.ekb.eg/service?article_code=174833

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4

Type

Original Article

Type Code

1,384

Publication Type

Journal

Publication Title

Menoufia Journal of Animal Poultry and Fish Production

Publication Link

https://mjapfp.journals.ekb.eg/

MainTitle

SELECTION FOR SOME PRODUCTIVE TRAITS IN NORFA LAYING HENS.

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Article

Created At

23 Jan 2023