Journal
GENOMICS
Volume 112, Issue 2, Pages 1481-1489Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ygeno.2019.08.019
Keywords
Genetic map; Inversion; Recombination; Soybean
Funding
- Next-Generation BioGreen 21 Program [PJ01321304]
- Rural Development Administration
- National Research Foundation - Korea government [NRF-2018R1A2A2A05021904]
- Korea Research Institute of Bioscience and Biotechnology Research Initiative Program
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Recombination is a crucial component of evolution and breeding. New combinations of variation on chromosomes are shaped by recombination. Recombination is also involved in chromosomal rearrangements. However, recombination rates vary tremendously among chromosome segments. Genome-wide genetic maps are one of the best tools to study variation of recombination. Here, we describe high density genetic maps of Glycine max and Glycine sofa constructed from four segregating populations. The maps were used to identify chromosomal rearrangements and find the highly predictable pattern of cross-overs on the broad scale in soybean. Markers on these genetic maps were used to evaluate assembly quality of the current soybean reference genome sequence. We find a strong inversion candidate larger than 3 Mb based on patterns of cross-overs. We also identify quantitative trait loci (QTL) that control number of cross-overs. This study provides fundamental insights relevant to practical strategy for breeding programs and for pan-genome researches.
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