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Sequencing of Cultivated Peanut, Arachis hypogaea, Yields Insights into Genome Evolution and Oil Improvement

文献类型： 外文期刊

作者： Chen, Xiaoping 1 ; Lu, Qing 1 ; Liu, Hao 1 ; Zhang, Jianan 2 ; Hong, Yanbin 1 ; Lan, Haofa 3 ; Li, Haifen 1 ; Wang, Jinpe 1 ;

作者机构： 1.GAAS, South China Peanut Subctr Natl Ctr Oilseed Crops, Guangdong Key Lab Crops Genet Improvement, Crops Res Inst, Guangzhou, Guangdong, Peoples R China

2.Hebei Acad Agr & Forestry Sci, Natl Foxtail Millet Improvement Ctr, Minor Cereal Crops Lab Hebei Prov, Inst Millet Crops, Shijiazhuang, Hebei, Peoples R China

3.MolBreeding Biotechnol Co Ltd, Shijiazhuang, Hebei, Peoples R China

4.North China Univ Sci & Technol, Sch Life Sci, Tangshan, Peoples R China

5.North China Univ Sci & Technol, Ctr Genom & Computat Biol, Tangshan, Peoples R China

6.Int Crops Res Inst Semi Arid Trop, Ctr Excellence Genom & Syst Biol, Hyderabad, Telangana, India

7.Natl Orchid Conservat Ctr China, Shenzhen Key Lab Orchid Conservat & Utilizat, Shenzhen, Peoples R China

8.Orchid Conservat & Res Ctr Shenzhen, Shenzhen, Peoples R China

9.Shandong Acad Agr Sci, Shandong Peanut Res Inst, Qingdao, Shandong, Peoples R China

10.Univ Western Australia, UWA Inst Agr, Crawley, Australia

11.Fujian Agr & Forestry Univ, Coll Landscape Architecture, Key Lab Natl Forestry & Grassland Adm Orchid Cons, Fuzhou 350002, Peoples R China

12.Fujian Agr & Forestry Univ, Coll Forestry, Fujian Coll & Univ Engn Res Inst Conservat & Util, Fuzhou 350002, Peoples R China

13.Univ Georgia, Plant Genome Mapping Lab, Athens, GA 30602 USA

关键词： cultivated peanut; de novo sequencing; comparative genomics; genome evolution; oil metabolism

期刊名称：MOLECULAR PLANT （ 影响因子：13.164； 五年影响因子：16.357 ）

ISSN： 1674-2052

年卷期： 2019 年 12 卷 7 期

页码：

收录情况： SCI

摘要： Cultivated peanut (Arachis hypogaea) is an allotetraploid crop planted in Asia, Africa, and America for edible oil and protein. To explore the origins and consequences of tetraploidy, we sequenced the allotetraploid A. hypogaea genome and compared it with the related diploid Arachis duranensis and Arachis ipaensis genomes. We annotated 39 888 A-subgenome genes and 41 526 B-subgenome genes in allotetraploid peanut. The A. hypogaea subgenomes have evolved asymmetrically, with the B subgenome resembling the ancestral state and the A subgenome undergoing more gene disruption, loss, conversion, and transposable element proliferation, and having reduced gene expression during seed development despite lacking genome-wide expression dominance. Genomic and transcriptomic analyses identified more than 2 500 oil metabolism-related genes and revealed that most of them show altered expression early in seed development while their expression ceases during desiccation, presenting a comprehensive map of peanut lipid biosynthesis. The availability of these genomic resources will facilitate a better understanding of the complex genome architecture, agronomically and economically important genes, and genetic improvement of peanut.

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