期刊
JOURNAL OF ANIMAL BREEDING AND GENETICS
卷 139, 期 3, 页码 307-319出版社
WILEY
DOI: 10.1111/jbg.12659
关键词
Bos taurus; coat colour; genetic resource; genome; population genomics
资金
- Programma di Sviluppo Rurale Nazionale
- European Union
- Italian Ministry of Agriculture, Food and Forestry-MiPAAF
- University of Bologna [RFO2019-2020]
Autochthonous cattle breeds, namely Reggiana and Modenese, exhibit distinct coat colors and genetic variations that are influenced by specific genes such as MC1R and ASIP. This study demonstrates the use of population genomic approaches to uncover the genetic mechanisms underlying breed-specific traits in cattle.
Autochthonous cattle breeds are genetic resources that, in many cases, have been fixed for inheritable exterior phenotypes useful to understand the genetic mechanisms affecting these breed-specific traits. Reggiana and Modenese are two closely related autochthonous cattle breeds mainly raised in the production area of the well-known Protected Designation of Origin Parmigiano-Reggiano cheese, in the North of Italy. These breeds can be mainly distinguished for their standard coat colour: solid red in Reggiana and solid white with pale shades of grey in Modenese. In this study we genotyped with the GeneSeek GGP Bovine 150k single nucleotide polymorphism (SNP) chip almost half of the extant cattle populations of Reggiana (n = 1109 and Modenese (n = 326) and used genome-wide information in comparative F-ST analyses to detect signatures of selection that diverge between these two autochthonous breeds. The two breeds could be clearly distinguished using multidimensional scaling plots and admixture analysis. Considering the top 0.0005% F-ST values, a total of 64 markers were detected in the single-marker analysis. The top F-ST value was detected for the melanocortin 1 receptor (MC1R) gene mutation, which determines the red coat colour of the Reggiana breed. Another coat colour gene, agouti signalling protein (ASIP), emerged amongst this list of top SNPs. These results were also confirmed with the window-based analyses, which included 0.5-Mb or 1-Mb genome regions. As variability affecting ASIP has been associated with white coat colour in sheep and goats, these results highlighted this gene as a strong candidate affecting coat colour in Modenese breed. This study demonstrates how population genomic approaches designed to take advantage from the diversity between local genetic resources could provide interesting hints to explain exterior traits not yet completely investigated in cattle.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据