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346535

GENETIC AND ENVIRONMENTAL ESTIMATES FOR MILKING-ABILITY TRAITS IN HOLSTEIN CATTLE UNDER EGYPTIAN CIRCUMSTANCES

Article

Last updated: 04 Jan 2025

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Subjects

-

Tags

Animal genetic and breeding

Abstract

The study was conducted to investigate genetic and environmental factors affecting, and estimating genetic parameters, for milk production and milking-ability traits of Holstein cows. The data obtained from six herds from a commercial farm called Dina for agriculture investment, located in Cairo-Alex. desert road (80 Km) from Cairo, Menoufia, Egypt. It included 3881 cows as progenies of 3321 dams and 261 sires in 6 herds that represented the period from 2007 to 2014. Studied Traits are milk production trait 305-days milk yield (305-dMY), and milking-ability traits like average flow rate (kg/min), peak flow rate (kg/min) and milking duration (min) for cows have Age at First Calving (AFC) equal 24.8±2.3 month. The means (CV%) of milk production and milking-ability traits as 305-dMY, AFR, PF, and MD were 9399±1767 kg, (18.8%), 2.21±0.78 kg/min, (35%), 3.93±1 kg/min, (25%), and 4.09±1.29 min, (32%), respectively. Sire, dam, herd, parity, year, and season of calving had significant effects on studied traits. Heritability estimates were 0.27 ±0.061, 0.20 ±0.013, 0.07 ±0.002, and 0.09 ±0.001 for 305-dMY, AFR, PF, and MD, respectively. Estimates of rG and rP among studied traits were positive. Moderate estimates of heritability and positive genetic correlation among certain studied traits suggested that genetic improvement would be achieved via selection of appropriate breeding program

DOI

10.21608/ejap.2024.253971.1066

Keywords

genetic parameters, milk production, milking-ability, Holstein cattle

Authors

First Name

Eslam

Last Name

Faid-allah

MiddleName

-

Affiliation

Animal Production Department, Faculty of Agriculture, Menoufia University, Menoufia, Egypt

Email

ifaidallah@agr.menofia.edu.eg

City

-

Orcid

0000-0003-2677-0735

First Name

Elham

Last Name

Ghoneim

MiddleName

-

Affiliation

Animal Production Department, Faculty of Agriculture, Menoufia University, Menoufia, Egypt

Email

elham.ghonaim@agr.menofia.edu.eg

City

-

Orcid

0009-0004-8378-5233

First Name

Mohamed

Last Name

Al-Khomri

MiddleName

-

Affiliation

Animal Production Department, Faculty of Agriculture, Menoufia University, Menoufia, Egypt

Email

mohamed.adel@agr.menofia.edu.eg

City

-

Orcid

0009-0004-3791-8170

Volume

60

Article Issue

3

Related Issue

45834

Issue Date

2023-09-01

Receive Date

2023-12-12

Publish Date

2023-09-01

Page Start

113

Page End

122

Print ISSN

0302-4520

Online ISSN

2735-3028

Article File

EJAP_Volume 60_Issue 3_Pages 113-122.pdf

PDF . 442.6kB

Link

https://ejap.journals.ekb.eg/article_346535.html

Detail API

https://ejap.journals.ekb.eg/service?article_code=346535

Order

3

Type

Original Article

Type Code

1,298

Publication Type

Journal

Publication Title

Egyptian Journal of Animal Production

Publication Link

https://ejap.journals.ekb.eg/

MainTitle

GENETIC AND ENVIRONMENTAL ESTIMATES FOR MILKING-ABILITY TRAITS IN HOLSTEIN CATTLE UNDER EGYPTIAN CIRCUMSTANCES

Details

Type

Article

Created At

25 Dec 2024