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Genetic and phenotypic parameters for growth and lamb survival traits of Farta and their crosses with Washera sheep in northwest Ethiopia: Inputs to design of breeding programs

Abebe, Abiye Shenkut and Alemayehu, Kefyalew and Gizaw, Solomon and Johansson, Anna Maria (2022). Genetic and phenotypic parameters for growth and lamb survival traits of Farta and their crosses with Washera sheep in northwest Ethiopia: Inputs to design of breeding programs. Cogent Food & Agriculture. 8 :1 , 2082043
[Research article]

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Abstract

Genetic and phenotypic parameters were estimated for various traits of Farta and their crosses with Washera sheep in northwest Ethiopia. Data collected from 2015 to 2020 on 4318 lambs were used. A number of models were evaluated, all contained the direct additive animal genetic effect and then, either the maternal genetic or permanent environment or both effects. The estimates of direct heritability for birth weight, weaning weight, pre-weaning daily gain, six-month weight, yearling weight and pre-weaning lamb survival were 0.08 +/- 0.03, 0.20 +/- 0.05, 0.15 +/- 0.05, 0.24 +/- 0.06, 0.29 +/- 0.14 and 0.14 +/- 0.04, respectively. The maternal heritabilities were 0.29 +/- 0.05, 0.31 +/- 0.05, 0.40 +/- 0.05, 0.15 +/- 0.57 and 0.02 +/- 0.15 for weaning weight, pre-weaning daily gain, six-month weight, yearling weight and pre-weaning lamb survival, respectively. Genetic correlation between birth weight and pre-weaning lamb survival was negative (-0.36 +/- 0.22), implying heavier lambs have low pre-weaning survival. For the other pairs of traits, genetic correlations ranging from 0.10 +/- 0.16 between yearling weight and pre-weaning lamb survival to 0.98 +/- 0.01 between weaning weight and pre-weaning daily gain were estimated. Overall, the present study showed that heritability is more likely to be overestimated if the maternal genetic and permanent environment effects are not taken into account. Parameters estimated in the current study can be used to design sheep breeding programs.

Authors/Creators:Abebe, Abiye Shenkut and Alemayehu, Kefyalew and Gizaw, Solomon and Johansson, Anna Maria
Title:Genetic and phenotypic parameters for growth and lamb survival traits of Farta and their crosses with Washera sheep in northwest Ethiopia: Inputs to design of breeding programs
Series Name/Journal:Cogent Food & Agriculture
Year of publishing :2022
Volume:8
Number:1
Article number:2082043
Number of Pages:14
Publisher:TAYLOR AND FRANCIS AS
ISSN:2331-1932
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 402 Animal and Dairy Science > Animal and Dairy Science.
Keywords:Farta sheep, genetic correlation, growth traits, heritability, lamb survival
URN:NBN:urn:nbn:se:slu:epsilon-p-117547
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-117547
Additional ID:
Type of IDID
DOI10.1080/23311932.2022.2082043
Web of Science (WoS)000804004000001
ID Code:28519
Faculty:VH - Faculty of Veterinary Medicine and Animal Science
Department:(VH) > Dept. of Animal Breeding and Genetics
Deposited By: SLUpub Connector
Deposited On:22 Aug 2022 15:31
Metadata Last Modified:22 Aug 2022 15:41

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