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250507

Genetic analysis of pre-weaning litter traits in V-line rabbits using a single-trait animal model

Article

Last updated: 04 Jan 2025

Subjects

-

Tags

Animal and Poultry Production

Abstract

The objective of this study was to obtain heritability (h2a), permanent environment (pe2) effect, repeatability (R) estimates and predicted breeding values (PBVS) for litter traits which include; litter size at birth (LSB), number of live bunnies at birth (NBA), litter size at weaning (LSW), litter weight at birth (LWB), litter weight at weaning (LWW) and litter body gain from birth to weaning (PLG) in V-Line rabbits maintained by the faculty of agriculture, Al-Azhar University in Nasr City, Cairo, Egypt using repeatability single-trait animal model analysis. h2a estimates for litter size traits (LSB, NBA, and LSW) were low, ranging from 0.05 to 0.07 and from 0.09 to 0.14 for litter weight traits (LWB, LWW, and PLG). The proportions of pe2 effect were also small, ranging from 0.0006 to 0.001.Due to the smallness of pe2, the estimated pe2 was about the same magnitude as for h2a. Estimates of genetic correlation (rg) were positive across all correlated traits. It is closely correlated between LSB and NBA and between LWW and PLG (0.99). The rest of rg values, among other traits, were positive, moderate to high, ranging from 0.50 to 0.79. As forrank correlation (rs), it was positive, moderate, and highly significant and ranged from 0.45 to 0.99. Ranges of PBVS for litter size traits revealed that these ranges decreased with the advance of age of the litter from birth up to weaning, and the opposite has been observed for litter weight traits. Based on the results of the current study, this herd needs an environment (non-genetic factors) that is as similar as possible with continuous genetic evaluation and selection based on high breeding animal values.

DOI

10.21608/aasj.2022.107003.1096

Keywords

Rabbits, Genetic, litter traits, heritability, repeatability, Breeding value

Authors

First Name

M.

Last Name

Shehab El-Din

MiddleName

I.

Affiliation

Department of Animal Production, Faculty of Agriculture, Al-Azhar University, Cairo, Egypt

Email

shehabeldin@azhar.edu.eg

City

-

Orcid

0000-0001-7496-2964

Volume

5

Article Issue

1

Related Issue

39383

Issue Date

2022-04-01

Receive Date

2021-11-20

Publish Date

2022-04-01

Page Start

211

Page End

225

Print ISSN

2535-1680

Online ISSN

2535-1699

Link

https://aasj.journals.ekb.eg/article_250507.html

Detail API

https://aasj.journals.ekb.eg/service?article_code=250507

Order

17

Type

Research article

Type Code

764

Publication Type

Journal

Publication Title

Archives of Agriculture Sciences Journal

Publication Link

https://aasj.journals.ekb.eg/

MainTitle

Genetic analysis of pre-weaning litter traits in V-line rabbits using a single-trait animal model

Details

Type

Article

Created At

30 Dec 2024