Genetic Parameters and Genomic Regions Underlying Growth and Linear Type Traits in Akkaraman Sheep

Overview

Journal Genes (Basel)

Publisher MDPI

Date 2022 Aug 26

PMID 36011330

Authors

Mehmet Kizilaslan

Yunus Arzik

Stephen N White

Lindsay M W Piel

Mehmet Ulas Cinar

Affiliations

Soon will be listed here.

Abstract

In the current study, the genetic architecture of growth and linear type traits were investigated in Akkaraman sheep. Estimations of genomic heritability, genetic correlations, and phenotypic correlations were implemented for 17 growth and linear type traits of 473 Akkaraman lambs by the univariate and multivariate analysis of animal mixed models. Correspondingly, moderate heritability estimates, as well as high and positive genetic/phenotypic correlations were found between growth and type traits. On the other hand, 2 genome-wide and 19 chromosome-wide significant single nucleotide polymorphisms were found to be associated with the traits as a result of animal mixed model-based genome-wide association analyses. Accordingly, we propose several genes located on different chromosomes (e.g., , and ) as putative quantitative trait loci for the 22 growth and linear type traits studied. In our study, specific genes (e.g., and ) were found common between the traits studied, suggesting an interplay between the genetic backgrounds of these traits. The fact that four of the proposed genes ( and ) are located on sheep chromosome 2 confirms the importance of these genomic regions for growth and morphological structure in sheep. The results of our study are therefore of great importance for the development of efficient selection indices and marker-assisted selection programs, as well as for the understanding of the genetic architecture of growth and linear traits in sheep.

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