期刊
NATURE GENETICS
卷 45, 期 1, 页码 51-+出版社
NATURE RESEARCH
DOI: 10.1038/ng.2470
关键词
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资金
- Ministry of Science and Technology of the People's Republic of China [2010DFB33740, 2012AA020103, 2012AA100101, 2012AA100103, 2012AA100105]
- Ministry of Agriculture of the People's Republic of China [CARS-26]
- Major Program of Beijing Natural Science Foundation of China [5100001]
- Beijing Municipal Science and Technology Commission of China [D111100001311002]
- National Natural Science Foundation of China [30972015, 31171980, 31272184]
- Agence Nationale de la Recherche [ANR-09-JCJC-0058-01]
- USDA National Institute of Food and Agriculture [NIFA 201015479]
- US National Science Foundation [IOS-0923312, IOS-1025642]
- US-Israel Binational Agricultural Research and Development Fund [IS-4223-09C]
- USDA Agricultural Research Service
Watermelon, Citrullus lanatus, is an important cucurbit crop grown throughout the world. Here we report a high-quality draft genome sequence of the east Asia watermelon cultivar 97103 (2n = 2x = 22) containing 23,440 predicted protein-coding genes. Comparative genomics analysis provided an evolutionary scenario for the origin of the 11 watermelon chromosomes derived from a 7-chromosome paleohexaploid eudicot ancestor. Resequencing of 20 watermelon accessions representing three different C. lanatus subspecies produced numerous haplotypes and identified the extent of genetic diversity and population structure of watermelon germplasm. Genomic regions that were preferentially selected during domestication were identified. Many disease-resistance genes were also found to be lost during domestication. In addition, integrative genomic and transcriptomic analyses yielded important insights into aspects of phloem-based vascular signaling in common between watermelon and cucumber and identified genes crucial to valuable fruit-quality traits, including sugar accumulation and citrulline metabolism.
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