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198669

Genetic Parameters for Milk Traits in Egyptian Native Cows

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Last updated: 22 Jan 2023

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Abstract

The aim of this study is to estimate the genetic parameters and the effect of non-genetic factors  for some milk traits including total milk yield (TMY), Lactation period (LP), number of services per conception (NSC), days open (DO), calving interval (CI) and dry period (DP). Data were collected from two farms. Experimental Farm belonging to (APRI) data included 1829 records. The statistical analysis has been adopted using animal models. Actual means of TMY/kg, LP/day, NSC/services, DO/day, CI/day and DP/day were 791.3, 171.1, 1.8, 109, 402.7 and 79.3 respectively. Estimated heritability (h2) of TMY, LP, NSC, DO, CI, and DP were 0.18± 0.01, 0.15± 0.001, 0.07± 0.016, 0.05± 0.001, 0.09± 0.041 and 0.09±0.001 respectively. While the range of BV of the cows was the highest for all traits TMY/kg, LP/day, NSC, /services, DO/day, CI/day and DP/day were 776.3, 26.7, 6.7, 13.4, 77.1 and 11.5 respectively. The estimated Predicted Breeding Value PBV for all traits varied widely. The genetic trends of cow breeding values were significant for all studied traits. This confirms that the genetic improvement of these traits leads to increased milk production traits. The study recommends preserving the Native Egyptian dairy cattle because they represent a national wealth that must be preserved from extinction through inventorying the genetic resources, characterization and evaluation of this local breed to benefit from it in improving animal breeds of high economic value. Due to the distinction of Egyptian domestic cows for their resistance to various environmental conditions.  

DOI

10.21608/asajs.2021.198669

Keywords

Egyptian Native cattle, Genetic trend, Milk Traits

Authors

First Name

Safaa.S.

Last Name

Sanad

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Affiliation

Animal production research Institute (APRI), Agriculture Research Center(ARC) Dokki, Giza, Egypt

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First Name

M. G.

Last Name

Gharib

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Affiliation

Animal production research Institute (APRI), Agriculture Research Center(ARC) Dokki, Giza, Egypt

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Volume

4

Article Issue

12

Related Issue

28049

Issue Date

2021-10-01

Receive Date

2021-10-09

Publish Date

2021-10-01

Page Start

23

Page End

46

Print ISSN

2537-0804

Online ISSN

2537-0855

Link

https://asajs.journals.ekb.eg/article_198669.html

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https://asajs.journals.ekb.eg/service?article_code=198669

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2

Type

المقالة الأصلية

Type Code

937

Publication Type

Journal

Publication Title

المجلة العربية للعلوم الزراعية

Publication Link

https://asajs.journals.ekb.eg/

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Article

Created At

22 Jan 2023