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- Title
Contributions of Zea mays subspecies mexicana haplotypes to modern maize.
- Authors
Ning Yang; Xi-Wen Xu; Rui-Ru Wang; Wen-Lei Peng; Lichun Cai; Jia-Ming Song; Wenqiang Li; Xin Luo; Luyao Niu; Yuebin Wang; Min Jin; Lu Chen; Jingyun Luo; Min Deng; Long Wang; Qingchun Pan; Feng Liu; Jackson, David; Xiaohong Yang; Ling-Ling Chen
- Abstract
Maize was domesticated from lowland teosinte (Zea mays ssp. parviglumis), but the contribution of highland teosinte (Zea mays ssp. mexicana, hereafter mexicana) to modern maize is not clear. Here, two genomes for Mo17 (a modern maize inbred) and mexicana are assembled using a meta-assembly strategy after sequencing of 10 lines derived from a maizeteosinte cross. Comparative analyses reveal a high level of diversity between Mo17, B73, and mexicana, including three Mb-size structural rearrangements. The maize spontaneous mutation rate is estimated to be 2.17 × 10-8 ~3.87 × 10-8 per site per generation with a nonrandom distribution across the genome. A higher deleterious mutation rate is observed in the pericentromeric regions, and might be caused by differences in recombination frequency. Over 10% of the maize genome shows evidence of introgression from the mexicana genome, suggesting that mexicana contributed to maize adaptation and improvement. Our data offer a rich resource for constructing the pan-genome of Zea mays and genetic improvement of modern maize varieties.
- Subjects
CORN genetics; HAPLOTYPES; ZEA diploperennis; CORN genome mapping; INTROGRESSION (Genetics); CORN varieties
- Publication
Nature Communications, 2017, Vol 8, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-017-02063-5