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42591

GENETIC IMPROVEMENT OF EGG PRODUCTION TRAITS IN DOKKI-4 STRAIN. 2-CORRELATED RESPONSES, HERITABILITY, GENETIC AND PHENOTYPIC CORRELATIONS FOR BODY WEIGHT RAITS.

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Last updated: 04 Jan 2025

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Abstract

This present study was carried out during three successive generations to improve body weight through selection in developed Dokki-4 chicken strain and to study correlated response of some economic traits. The chicks in each generation represented two lines, selected line for high body weight and control line. The results showed that body weight at different ages studied were  improved in selected more than control line (P < 0.01). There were significant differences (P < 0.05) between generations, lines and sexes body weight (BW), daily weight gain (DG), feed conversion (FC), and body weight measurements (shank length, keel length and body circumference) at 4 , 8 , and 12 weeks.              Selection differentials of male 12-weeks body weight were 71.0 gm and 57 gm in the selected generations. The corresponding values for females were 54.0 gm and 48.0 gm. The cumulative realized and expected responses, were 130.3 gm and 28.16 gm for males, and were 83.9 gm and 22.4 gm for females over two generations, respectively. The cumulative realized  response to selection for body weight was   26.01, 58.0 and 81.95 for body weight at 4, 8 and 12 weeks of age , 0.92, 1.14, 0.94 and 1.03 for daily weight gain,  0.31, 0.82 and 1.46 for shank length, keel length and body circumference at 12 weeks, while, were with feed conversion  -0.89, -1.27 and -1.32 at 4, 8 and 12 weeks of age.              Heritability estimates based on sire component of variance (first and second generation) for all traits studied were ranged between high, medium and low values. Positive genetic and phenotypic correlations were found body weight at 12 weeks of age and body weight at different ages, daily weight gain, and body measurements (shank length, keel length and body circumference), the range between the values of high, medium and low. But among body weight and feed conversion were negative. In conclusion, the high positive correlation obtained in this study indicate that an improvement in body weight might lead to an improvement in other traits and body measurements. This is a good indicator of body conformation and may be used in selection programmer.  

DOI

10.21608/jpd.2013.42591

Keywords

Dokki-4 strain, correlated responses, heritability, genetic & phenotypic correlations, body weight traits

Authors

First Name

Hasan

Last Name

Younis

MiddleName

-

Affiliation

Poultry Production Department, Faculty of Agriculture, Kafr Elsheikh University, Egypt.

Email

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City

Kafr El sheikh

Orcid

-

First Name

Fawzy

Last Name

Abdel-Ghany

MiddleName

-

Affiliation

Animal Production Research Institute, Agriculture Research Center, Ministry of Agriculture, Egypt.

Email

-

City

Giza

Orcid

-

First Name

Nasra

Last Name

Awadein

MiddleName

-

Affiliation

Animal Production Research Institute, Agriculture Research Center, Ministry of Agriculture, Egypt.

Email

-

City

Giza

Orcid

-

Volume

18

Article Issue

3

Related Issue

6656

Issue Date

2013-08-01

Receive Date

2013-06-28

Publish Date

2013-08-01

Page Start

475

Page End

494

Print ISSN

1110-2543

Online ISSN

2682-3322

Article File

JPD_Volume 18_Issue 3_Pages 475-494.pdf

PDF . 455.0kB

Link

https://jpd.journals.ekb.eg/article_42591.html

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https://jpd.journals.ekb.eg/service?article_code=42591

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Original Article

Type Code

867

Publication Type

Journal

Publication Title

Journal of Productivity and Development

Publication Link

https://jpd.journals.ekb.eg/

MainTitle

GENETIC IMPROVEMENT OF EGG PRODUCTION TRAITS IN DOKKI-4 STRAIN. 2-CORRELATED RESPONSES, HERITABILITY, GENETIC AND PHENOTYPIC CORRELATIONS FOR BODY WEIGHT RAITS.

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Article

Created At

22 Jan 2023