Abstract
Lychee is an exotic tropical fruit with a distinct flavor. The genome of cultivar ‘Feizixiao’ was assembled into 15 pseudochromosomes, totaling ~470 Mb. High heterozygosity (2.27%) resulted in two complete haplotypic assemblies. A total of 13,517 allelic genes (42.4%) were differentially expressed in diverse tissues. Analyses of 72 resequenced lychee accessions revealed two independent domestication events. The extremely early maturing cultivars preferentially aligned to one haplotype were domesticated from a wild population in Yunnan, whereas the late-maturing cultivars that mapped mostly to the second haplotype were domesticated independently from a wild population in Hainan. Early maturing cultivars were probably developed in Guangdong via hybridization between extremely early maturing cultivar and late-maturing cultivar individuals. Variable deletions of a 3.7 kb region encompassed by a pair of CONSTANS-like genes probably regulate fruit maturation differences among lychee cultivars. These genomic resources provide insights into the natural history of lychee domestication and will accelerate the improvement of lychee and related crops.
Original language | English (US) |
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Pages (from-to) | 73-83 |
Number of pages | 11 |
Journal | Nature Genetics |
Volume | 54 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2022 |
Funding
This work was supported by the China Litchi and Longan Industry Technology Research System (CARS-32), National Key Research and Development Program of China (2018YFD1000104, 2019YFD1000904), the National Nature Science Foundation of China (30900980, 31272135, 3127213, 31401829, 31872063, 31872066, 32072547), the Outstanding Talent Program of the Ministry of Agriculture, the Lingnan Fruit Innovation Team, the Litchi Breeding Post of Guangdong Modern Agricultural Industry and Technology System (LNSG2012-03, LNSG2012-04), the Special Support Program of Guangdong Province (2019TX05N193), the Key-Area Research and Development Program of Guangdong Province (2018B020202011), the ‘211 Project’ Construction Fund for Key Subjects of the College of Horticulture, South China Agricultural University, the Bagui Young Scholars Supporting Projects (BGQN201979-1), the discipline team building projects of Guangdong Academy of Agricultural Sciences in the 13th Five-Year Period, the Academy of Finland (318288) and NTU start-up grant to J.S., and the United States National Science Foundation (grants 1442190 and 2030871) to V.A.A.
ASJC Scopus subject areas
- Genetics