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GENETIC EVALUATION OF SOME ECONOMIC TRAITS IN A MATERNAL LINE OF RABBITS

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Last updated: 03 Jan 2025

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Abstract

Genetic evaluation of growth and litter traits was carried out in a line of rabbits selected for litter size at weaning. The evaluation was performed on 483 does and 10847 offspring over six consecutive years of production from 2005 to 2011, using BLUP under an animal repeatability model. The high proportions of animals with positive transmitting ability estimates for slaughter weight makes this trait much better to select for than weaning weight or daily weight gain, if we are looking for growth improvement. Whereas, for litter traits studied, Litter size at weaning seems to be the best trait to use as a selection criteria for improving the reproductive performance rather than Litter size at birth or Number born alive. Estimates of rank correlations were low between weaning weight and both of slaughter weight & daily weight gain While, correlation among ranks of transmitting ability value between slaughter weight and daily weight gain was moderate. Genetic trends estimated as a regression coefficient of trait breeding values on year of birth, which present generation number, for growth and litter traits were about 9 and 58 g/ year for weaning weight and slaughter weight, respectively. Whereas, for daily weight gain during the fattening period, the genetic trend increased yearly by 1.08 g/ d. The value of genetic trend for litter size at weaning, which used as criteria of selection in this line, means that, we can get one kit more from each litter each 12 generations.

DOI

10.21608/epsj.2014.5308

Keywords

Rabbits, Genetic evaluation, transmitting ability, Genetic trend, Rank correlation

Authors

First Name

Hanaa

Last Name

Moustafa

MiddleName

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Affiliation

Poul. Dept., Fac. of Agric., Alexandria University

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Orcid

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First Name

A.

Last Name

El-Raffa

MiddleName

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Affiliation

Poul. Dept., Fac. of Agric., Alexandria University

Email

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Orcid

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First Name

M.K.

Last Name

Shebl

MiddleName

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Affiliation

Poul. Dept., Fac. of Agric., Alexandria University

Email

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City

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Orcid

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First Name

A.

Last Name

El-Delebshany

MiddleName

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Affiliation

Poul. Dept., Fac. of Agric., Alexandria University

Email

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City

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Orcid

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First Name

Nadia

Last Name

El-Sayed

MiddleName

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Affiliation

Anim. Prod. Res., Inst., Agric. Res. Center

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Volume

34

Article Issue

1

Related Issue

899

Issue Date

2014-03-01

Receive Date

2018-02-15

Publish Date

2014-03-01

Page Start

85

Page End

98

Print ISSN

1110-5623

Online ISSN

2090-0570

Link

https://epsj.journals.ekb.eg/article_5308.html

Detail API

https://epsj.journals.ekb.eg/service?article_code=5308

Order

6

Type

Original Article

Type Code

493

Publication Type

Journal

Publication Title

Egyptian Poultry Science Journal

Publication Link

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

MainTitle

GENETIC EVALUATION OF SOME ECONOMIC TRAITS IN A MATERNAL LINE OF RABBITS

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Article

Created At

22 Jan 2023