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87123

Genetic and Phenotypic Association between Productive and Reproductive Traits in Friesian Cows In Egypt

Article

Last updated: 22 Jan 2023

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Abstract

Genetic parameters for Friesian cows were estimated from 9155 lactation records for 3625 cows sired by 182 bulls covered 34 years (1982-2015) in two herds (Sakha and El-Karada),  belongs to the Animal Production Research Institute, Ministry of Agriculture, Egypt. Multi-trait repeated animal model was employed using the REML procedure to estimate (co)variance components of productive (305-day milk yield-M305 and lactation period-LP) and reproductive traits (number of services per conception-NSC, calving to first service interval-CFS and days open-DO), There is sufficient genetic variation in productive (from 9.5 to 17.1%) and reproductive traits (from 3.9 to 10.3 %). Heritability estimates for M305 and LP traits were 0.204 and 0.110, however, reproduction traits were ranged from 0.010 to 0.044. Genetic correlation between M305 and LP was high (>0.94). Among reproductive traits, absolute genetic correlations were also high (>0.85). Genetic correlations between reproductive and productive traits were  high (>0.99). The annual genetic changes were positive for M305, LP, CFS and DO (9.07 kg/yr., 0.30, 0.07 and 0.24 d/yr., respectively), however it was -0.003 number/yr for NSC. The annual phenotypic changes were positive for M305, CFS and DO (12.4 kg/yr., 0.029 and 0.829d/yr., respectively), however it were negative for LP and NSC (-0.265 d/yr. and -0.002 number /yr.).

DOI

10.21608/jappmu.2020.87123

Keywords

Genetic, Phenotypic trend, Reproduction, production

Authors

First Name

S.

Last Name

Zahed

MiddleName

M.

Affiliation

Animal Production Research Institute, Ministry of Agriculture and Land Reclamation, Nadi El-Said Str., Dokki, Giza, Egypt

Email

smza56@hotmail.com

City

-

Orcid

-

First Name

Anas

Last Name

Badr

MiddleName

A. A.

Affiliation

Animal Production Res. Inst., Ministry of Agric., Dokki, Giza, Egypt

Email

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City

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Orcid

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First Name

A.

Last Name

Khattab

MiddleName

S.

Affiliation

Animal production Dept., Faculty of Agric., Tanta University.

Email

adelkhattab@yahoo.com

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Orcid

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Volume

11

Article Issue

3

Related Issue

13078

Issue Date

2020-03-01

Receive Date

2020-05-05

Publish Date

2020-03-01

Page Start

83

Page End

88

Print ISSN

2090-3642

Online ISSN

2090-3723

Link

https://jappmu.journals.ekb.eg/article_87123.html

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https://jappmu.journals.ekb.eg/service?article_code=87123

Order

4

Type

Original Article

Type Code

876

Publication Type

Journal

Publication Title

Journal of Animal and Poultry Production

Publication Link

https://jappmu.journals.ekb.eg/

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Article

Created At

22 Jan 2023