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388727

Genetic And Phenotypic Aspects and Trends of Longevity and Lifetime Production Traits in Friesian Cattle in Egypt

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Last updated: 24 Dec 2024

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Abstract

A total of 2914 cow records with complete set of all traits, daughters of 66 sires and 427 dams were used. The VCE animal model programs were used to estimate heritability, genetic and phenotypic correlations for longevity and lifetime production traits.Heritability estimates were 0.087, 0.149, 0.159 and 0.101 for LLNO, HL, PL and LLP, respectively, however it were 0.187, 0.176, 0.154, 0.146 and 0.108 for LM305, LTMY, LMYHL, LMYLP and LPHL, respectively. Genetic correlations between longevity traits (LLNO, HL, PL and LLP) were high and ranged from 0.901 between HL and LLP to 0.991 between LLNO and PL. Genetic correlations between lifetime production traits were high and ranged from 0.843 between LMYHL and LPHL to 0.995 between LM305 and LTMY. Phenotypic correlations were less than the corresponding genetic correlations among most traits. Genetic trend over 35 years was favorably positive for lifetime production traits, however it was unfavorably negative for longevity traits. The annual genetic changes were 53.6kg for LM305, 65.5kg for LTMY, 0.031kg for LMYHL, 0.063kg for LMYLP and 0.021% for LLPHL, however the annual genetic changes were -0.080, -0.356d, -4.9d and -4.9d for LLNo., LLP, HL and PL, respectively. Phenotypic trend was unfavorable deteriorating negative for all longevity and lifetime production traits over 35 years, except LMYLP, it was favorably positive.

DOI

10.21608/jappmu.2024.316828.1123

Keywords

genetic parameters, Trends, longevity and lifetime, Friesian

Authors

First Name

S.

Last Name

Zahed

MiddleName

M.

Affiliation

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

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Orcid

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First Name

Aya

Last Name

Abdel Rahman

MiddleName

M.

Affiliation

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

Email

asha102064@yahoo.com

City

-

Orcid

-

First Name

Anas

Last Name

Badr

MiddleName

A. A.

Affiliation

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

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-

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Volume

15

Article Issue

10

Related Issue

51233

Issue Date

2024-10-01

Receive Date

2024-10-23

Publish Date

2024-10-01

Page Start

151

Page End

156

Print ISSN

2090-3642

Online ISSN

2090-3723

Link

https://jappmu.journals.ekb.eg/article_388727.html

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https://jappmu.journals.ekb.eg/service?article_code=388727

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Original Article

Type Code

876

Publication Type

Journal

Publication Title

Journal of Animal and Poultry Production

Publication Link

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

MainTitle

Genetic And Phenotypic Aspects and Trends of Longevity and Lifetime Production Traits in Friesian Cattle in Egypt

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Article

Created At

24 Dec 2024