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Characterization of genome-wide segmental duplications reveals a common genomic feature of association with immunity among domestic animals.

Abstract：

BACKGROUND:Segmental duplications (SDs) commonly exist in plant and animal genomes, playing crucial roles in genomic rearrangement, gene innovation and the formation of copy number variants. However, they have received little attention in most livestock species. RESULTS:Aiming at characterizing SDs across the genomes of diverse livestock species, we mapped genome-wide SDs of horse, rabbit, goat, sheep and chicken, and also enhanced the existing SD maps of cattle and pig genomes based on the most updated genome assemblies. We adopted two different detection strategies, whole genome analysis comparison and whole genome shotgun sequence detection, to pursue more convincing findings. Accordingly we identified SDs for each species with the length of from 21.7 Mb to 164.1 Mb, and 807 to 4,560 genes were harboured within the SD regions across different species. More interestingly, many of these SD-related genes were involved in the process of immunity and response to external stimuli. We also found the existence of 59 common genes within SD regions in all studied species except goat. These common genes mainly consisted of both UDP glucuronosyltransferase and Interferon alpha families, implying the connection between SDs and the evolution of these gene families. CONCLUSIONS:Our findings provide insights into livestock genome evolution and offer rich genomic sources for livestock genomic research.

journal_name

BMC Genomics

journal_title

BMC genomics

authors

Feng X,Jiang J,Padhi A,Ning C,Fu J,Wang A,Mrode R,Liu JF

doi

10.1186/s12864-017-3690-x

subject

Has Abstract

pub_date

2017-04-12 00:00:00

pages

293

issue

1

issn

1471-2164

pii

10.1186/s12864-017-3690-x

journal_volume

18

pub_type

杂志文章

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