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TheAcer truncatumgenome provides insights into nervonic acid biosynthesis

文献类型： 外文期刊

作者： Ma, Qiuyue 1 ; Sun, Tianlin 2 ; Li, Shushun 1 ; Wen, Jing 1 ; Zhu, Lu 1 ; Yin, Tongming 3 ; Yan, Kunyuan 1 ; Xu, Xiao 2 ; Li 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Leisure Agr, Jiangsu Key Lab Hort Crop Genet Improvement, Nanjing 210014, Peoples R China

2.Novogene Bioinformat Inst, Beijing 100083, Peoples R China

3.Nanjing Forestry Univ, Coll Forestry, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing 210037, Peoples R China

4.Nanjing Forestry Univ, Southern Modern Forestry Collaborat Innovat Ctr, Nanjing 210037, Peoples R China

5.Beijing Forestry Univ, Coll Biol Sci & Technol, Beijing Adv Innovat Ctr Tree Breeding Mol Design, Beijing 100083, Peoples R China

6.Huazhong Agr Univ, Natl Key Lab Crop Genet Improvement, Wuhan 430070, Hubei, Peoples R China

关键词： Acer truncatum; nervonic acid; de novoassembly; very long-chain monounsaturated fatty acid; KCS

期刊名称：PLANT JOURNAL （ 影响因子：6.417； 五年影响因子：7.627 ）

ISSN： 0960-7412

年卷期： 2020 年 104 卷 3 期

页码：

收录情况： SCI

摘要： Acer truncatum(purpleblow maple) is a woody tree species that produces seeds with high levels of valuable fatty acids (especially nervonic acid). However, the lack of a complete genome sequence has limited both basic and applied research onA. truncatum. We describe a high-quality draft genome assembly comprising 633.28 Mb (contig N50 = 773.17 kb; scaffold N50 = 46.36 Mb) with at least 28 438 predicted genes. The genome underwent an ancient triplication, similar to the core eudicots, but there have been no recent whole-genome duplication events.Acer yangbienseandA. truncatumare estimated to have diverged about 9.4 million years ago. A combined genomic, transcriptomic, metabonomic, and cell ultrastructural analysis provided new insights into the biosynthesis of very long-chain monounsaturated fatty acids. In addition, threeKCSgenes were found that may contribute to regulating nervonic acid biosynthesis. TheKCSparalogous gene family expanded to 28 members, with 10 genes clustered together and distributed in the 0.27-Mb region of pseudochromosome 4. Our chromosome-scale genomic characterization may facilitate the discovery of agronomically important genes and stimulate functional genetic research onA. truncatum. Furthermore, the data presented also offer important foundations from which to study the molecular mechanisms influencing the production of nervonic acids.

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