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Rambutan genome revealed gene networks for spine formation and aril development

文献类型： 外文期刊

作者： Zhang, Wenping 1 ; Lin, Jishan 1 ; Li, Jianguo 2 ; Zheng, Shaoquan 3 ; Zhang, Xingtan 1 ; Chen, Shuai 1 ; Ma, Xiaokai; 1 ;

作者机构： 1.Fujian Agr & Forestry Univ, Ctr Genom & Biotechnol, Key Lab Genet, Fujian Prov Key Lab Haixia Appl Plant Syst Biol, Fuzhou 350002, Fujian, Peoples R China

2.South China Agr Univ, Guangdong Litchi Engn Res Ctr, State Key Lab Conservat & Utilizat Subtrop Agrobi, Guangzhou 510642, Peoples R China

3.Fujian Fruit Breeding Engn Technol Res Ctr Longan, Fuzhou 350013, Fujian, Peoples R China

4.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Haikou 570100, Hainan, Peoples R China

5.Trop Crops Inst, Baoting 572311, Hainan, Peoples R China

6.USDA ARS, Pacific Basin Agr Res Ctr, Hilo, HI USA

7.Univ Illinois, Dept Plant Biol, Urbana, IL 61801 USA

关键词： aril development; chromosome fusion; domestication; Nephelium lappaceum L; Sapindaceae; selective sweeps

期刊名称：PLANT JOURNAL （ 影响因子：6.486； 五年影响因子：7.666 ）

ISSN： 0960-7412

年卷期： 2021 年 108 卷 4 期

页码：

收录情况： SCI

摘要： Rambutan is a popular tropical fruit known for its exotic appearance, has long flexible spines on shells, extraordinary aril growth, desirable nutrition, and a favorable taste. The genome of an elite rambutan cultivar Baoyan 7 was assembled into 328 Mb in 16 pseudo-chromosomes. Comparative genomics analysis between rambutan and lychee revealed that rambutan chromosomes 8 and 12 are collinear with lychee chromosome 1, which resulted in a chromosome fission event in rambutan (n = 16) or a fusion event in lychee (n = 15) after their divergence from a common ancestor 15.7 million years ago. Root development genes played a crucial role in spine development, such as endoplasmic reticulum pathway genes, jasmonic acid response genes, vascular bundle development genes, and K+ transport genes. Aril development was regulated by D-class genes (STK and SHP1), plant hormone and phenylpropanoid biosynthesis genes, and sugar metabolism genes. The lower rate of male sterility of hermaphroditic flowers appears to be regulated by MYB24. Population genomic analyses revealed genes in selective sweeps during domestication that are related to fruit morphology and environment stress response. These findings enhance our understanding of spine and aril development and provide genomic resources for rambutan improvement.

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