气候变化领域集成服务门户(CCPortal): A chromosome-level genome of a Kordofan melon illuminates the origin of domesticated watermelons

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DOI	10.1073/pnas.2101486118
	A chromosome-level genome of a Kordofan melon illuminates the origin of domesticated watermelons
	Renner S.S.; Wu S.; Pérez-Escobar O.A.; Silber M.V.; Fei Z.; Chomicki G.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:23
英文摘要	Wild relatives or progenitors of crops are important resources for breeding and for understanding domestication. Identifying them, however, is difficult because of extinction, hybridization, and the challenge of distinguishing them from feral forms. Here, we use collection-based systematics, iconography, and resequenced accessions of Citrullus lanatus and other species of Citrullus to search for the potential progenitor of the domesticated watermelon. A Sudanese form with nonbitter whitish pulp, known as the Kordofan melon (C. lanatus subsp. cordophanus), appears to be the closest relative of domesticated watermelons and a possible progenitor, consistent with newly interpreted Egyptian tomb paintings that suggest that the watermelon may have been consumed in the Nile Valley as a dessert by 4360 BP. To gain insights into the genetic changes that occurred from the progenitor to the domesticated watermelon, we assembled and annotated the genome of a Kordofan melon at the chromosome level, using a combination of Pacific Biosciences and Illumina sequencing as well as Hi-C mapping technologies. The genetic signature of bitterness loss is present in the Kordofan melon genome, but the red fruit flesh color only became fixed in the domesticated watermelon. We detected 15,824 genome structural variants (SVs) between the Kordofan melon and a typical modern cultivar, “97103,” and mapping the SVs in over 400 Citrullus accessions revealed shifts in allelic frequencies, suggesting that fruit sweetness has gradually increased over the course of watermelon domestication. That a likely progenitor of the watermelon still exists in Sudan has implications for targeted modern breeding efforts. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Chromosome-level genome assembly; Domestication; Iconography of Egyptian tomb paintings; Phylogenetics; Watermelon
语种	英语
scopus关键词	article; bitter taste; breeding; chromosome; cultivar; domestication; fruit pulp; gene frequency; illumina sequencing; nonhuman; painting; phylogeny; Sudan; sweetness; watermelon
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238718
作者单位	Institute of Systematic Botany and Mycology, University of Munich, Munich, 80638, Germany; Boyce Thompson Institute, Ithaca, NY 14853, United States; Royal Botanic Gardens, Kew, Richmond, TW9 3AE, United Kingdom; Robert W. Holley Center for Agriculture and Health, Agricultural Research Service, US Department of Agriculture, Ithaca, NY 14853, United States; Department of Animal and Plant Sciences, University of Sheffield, Sheffield, S10 2TN, United Kingdom
推荐引用方式 GB/T 7714	Renner S.S.,Wu S.,Pérez-Escobar O.A.,et al. A chromosome-level genome of a Kordofan melon illuminates the origin of domesticated watermelons[J],2021,118(23).
APA	Renner S.S.,Wu S.,Pérez-Escobar O.A.,Silber M.V.,Fei Z.,&Chomicki G..(2021).A chromosome-level genome of a Kordofan melon illuminates the origin of domesticated watermelons.Proceedings of the National Academy of Sciences of the United States of America,118(23).
MLA	Renner S.S.,et al."A chromosome-level genome of a Kordofan melon illuminates the origin of domesticated watermelons".Proceedings of the National Academy of Sciences of the United States of America 118.23(2021).