@article{568247db51454b35b23b597bfaca850f,
title = "Genomic insights into the recent chromosome reduction of autopolyploid sugarcane Saccharum spontaneum",
abstract = "Saccharum spontaneum is a founding Saccharum species and exhibits wide variation in ploidy levels. We have assembled a high-quality autopolyploid genome of S. spontaneum Np-X (2n = 4x = 40) into 40 pseudochromosomes across 10 homologous groups, that better elucidates recent chromosome reduction and polyploidization that occurred circa 1.5 million years ago (Mya). One paleo-duplicated chromosomal pair in Saccharum, NpChr5 and NpChr8, underwent fission followed by fusion accompanied by centromeric split around 0.80 Mya. We inferred that Np-X, with x = 10, most likely represents the ancestral karyotype, from which x = 9 and x = 8 evolved. Resequencing of 102 S. spontaneum accessions revealed that S. spontaneum originated in northern India from an x = 10 ancestor, which then radiated into four major groups across the Indian subcontinent, China, and Southeast Asia. Our study suggests new directions for accelerating sugarcane improvement and expands our knowledge of the evolution of autopolyploids.",
author = "Qing Zhang and Yiying Qi and Haoran Pan and Haibao Tang and Gang Wang and Xiuting Hua and Yongjun Wang and Lianyu Lin and Zhen Li and Yihan Li and Fan Yu and Zehuai Yu and Yongji Huang and Tianyou Wang and Panpan Ma and Meijie Dou and Zongyi Sun and Yibin Wang and Hengbo Wang and Xingtan Zhang and Wei Yao and Yuntong Wang and Xinlong Liu and Maojun Wang and Jianping Wang and Zuhu Deng and Jingsheng Xu and Qinghui Yang and Liu, {Zhong Jian} and Baoshan Chen and Muqing Zhang and Ray Ming and Jisen Zhang",
note = "Funding Information: This work was supported by funding from the National Key Research and Development Program (2021YFF1000100), the Science and Technology Planting Project of Guangdong Province (2019B020238001), the National High-tech R&D Program (2013AA100604) and the Fujian Provincial Department of Education (JA12082) to J.Z.; the National Key Research and Development Program (2021YFF1000104) to H.T.; the Science and Technology Major Project of Guangxi (AA17202025) to M.Z.; and the China Scholarship Council (201707877011), the Scientific Research Foundation of the Graduate School of Fujian Agriculture and Forestry University Grant (324-1122yb050) and the fellowship of China Postdoctoral Science Foundation (2021M703555) to Q.Z. Publisher Copyright: {\textcopyright} 2022, The Author(s), under exclusive licence to Springer Nature America, Inc.",
year = "2022",
month = jun,
doi = "10.1038/s41588-022-01084-1",
language = "English (US)",
volume = "54",
pages = "885--896",
journal = "Nature Genetics",
issn = "1061-4036",
publisher = "Nature Publishing Group",
number = "6",
}