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Genome-wide identification of meiotic recombination hot spots detected by SLAF in peanut (Arachis hypogaea L.)

Genome-wide identification of meiotic recombination hot spots detected by SLAF in peanut (Arachis hypogaea L.)

Authors :
Xiaohua Wang
Ping Xu
Yan Ren
Liang Yin
Shuangling Li
Yan Wang
Yanmao Shi
Hui Li
Xue Cao
Xiaoyuan Chi
Tianyi Yu
Manish K. Pandey
Rajeev K. Varshney
Mei Yuan
Source :
Scientific Reports, Vol 10, Iss 1, Pp 1-11 (2020)
Publication Year :
2020
Publisher :
Nature Portfolio, 2020.

Abstract

Abstract Recombination hot spots (RHP), caused by meiosis, are considered to play crucial roles in improvement and domestication of crop. Cultivated peanut is one of the most important rich-source of oil and protein crops. However, no direct scale of recombination events and RHP have been estimated for peanut. To examine the scale of recombination events and RHP in peanut, a RIL population with 200 lines and a natural population with 49 cultivars were evaluated. The precise integrated map comprises 4837 SLAF markers with genetic length of 2915.46 cM and density of 1.66 markers per cM in whole genome. An average of 30.0 crossover (2.06 cMMb−1) events was detected per RIL plant. The crossover events (CE) showed uneven distribution among B sub-genome (2.32) and A sub-genome (1.85). There were 4.34% and 7.86% of the genome contained large numbers of CE (> 50 cMMb−1) along chromosomes in F6 and natural population, respectively. High density of CE regions called RHP, showed negative relationship to marker haplotypes conservative region but positive to heatmap of recombination. The genes located within the RHP regions by GO categories showed the responding of environmental stimuli, which suggested that recombination plays a crucial role in peanut adaptation to changing environments

Subjects

Subjects :
Medicine
Science

Details

Language :
English
ISSN :
20452322
Volume :
10
Issue :
1
Database :
Directory of Open Access Journals
Journal :
Scientific Reports
Publication Type :
Academic Journal
Accession number :
edsdoj.92dba3bd01d8493f95709476255fb797
Document Type :
article
Full Text :
https://doi.org/10.1038/s41598-020-70354-x