Abstract
Over the two past decades, a significant number of studies have observed animal growth traits to examine animal genetic mechanisms due to their ease of measurement and high heritability. Chicken which has a significant impact on fundamental biology is a major source of protein worldwide, making it an ideal model for examining animal growth trait development. The genetic mechanisms of chicken growth traits have been studied using quantitative trait loci mapping through genome-scan and candidate gene approaches, genome-wide association studies (GWAS), comparative genomic strategies, microRNA (miRNA) regulation of growth development analysis, and epigenomic analysis. This review focuses on chicken GWAS and miRNA regulation of growth traits. Several recently published GWAS reports showed that most genome-wide significant single nucleotide polymorphisms are located on chromosomes 1 and 4 in chickens. Chicken growth, particularly skeletal muscle growth and development, is greatly regulated by miRNA. Using dwarf and normal chickens, let-7b was found to be involved in determining chicken dwarf phenotypes by regulating growth hormone receptor gene expression.
Keywords: Chicken, Genome-wide association study (GWAS), Growth traits, microRNA (miRNA) regulation, Quantitative trait loci (QTL), Single nucleotide polymorphisms (SNPs)
Current Genomics
Title:Overview of Genomic Insights into Chicken Growth Traits Based on Genome- Wide Association Study and microRNA Regulation
Volume: 14 Issue: 2
Author(s): Zhenqiang Xu, Qinghua Nie and Xiquan Zhang
Affiliation:
Keywords: Chicken, Genome-wide association study (GWAS), Growth traits, microRNA (miRNA) regulation, Quantitative trait loci (QTL), Single nucleotide polymorphisms (SNPs)
Abstract: Over the two past decades, a significant number of studies have observed animal growth traits to examine animal genetic mechanisms due to their ease of measurement and high heritability. Chicken which has a significant impact on fundamental biology is a major source of protein worldwide, making it an ideal model for examining animal growth trait development. The genetic mechanisms of chicken growth traits have been studied using quantitative trait loci mapping through genome-scan and candidate gene approaches, genome-wide association studies (GWAS), comparative genomic strategies, microRNA (miRNA) regulation of growth development analysis, and epigenomic analysis. This review focuses on chicken GWAS and miRNA regulation of growth traits. Several recently published GWAS reports showed that most genome-wide significant single nucleotide polymorphisms are located on chromosomes 1 and 4 in chickens. Chicken growth, particularly skeletal muscle growth and development, is greatly regulated by miRNA. Using dwarf and normal chickens, let-7b was found to be involved in determining chicken dwarf phenotypes by regulating growth hormone receptor gene expression.
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Cite this article as:
Xu Zhenqiang, Nie Qinghua and Zhang Xiquan, Overview of Genomic Insights into Chicken Growth Traits Based on Genome- Wide Association Study and microRNA Regulation, Current Genomics 2013; 14 (2) . https://dx.doi.org/10.2174/1389202911314020006
DOI https://dx.doi.org/10.2174/1389202911314020006 |
Print ISSN 1389-2029 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-5488 |
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