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A high-quality genome of taro (Colocasia esculenta(L.) Schott), one of the world's oldest crops

文献类型： 外文期刊

作者： Yin, Jianmei 1 ; Jiang, Lu 1 ; Wang, Li 1 ; Han, Xiaoyong 1 ; Guo, Wenqi 1 ; Li, Chunhong 1 ; Zhou, Yi 2 ; Denton, Matthe 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Ind Crops, Nanjing 210014, Peoples R China

2.Univ Adelaide, Sch Agr Food & Wine, Urrbrae, SA, Australia

关键词： Colocasia esculenta(L; ) Schott; de novo assembly; genome annotation; Hi-C; phylogenetic analysis; sequencing

期刊名称：MOLECULAR ECOLOGY RESOURCES （ 影响因子：7.09； 五年影响因子：8.745 ）

ISSN： 1755-098X

年卷期：

页码：

收录情况： SCI

摘要： Taro (Colocasia esculenta(L.), Schott), from the Araceae family, is one of the oldest crops with important edible, medicinal, nutritional and economic value. Taro is a highly polymorphic species including diverse genotypes adapted to a broad range of environments, but the taro genome has rarely been investigated. Here, a high-quality chromosome-level genome ofC. esculentawas assembled using data sequenced by Illumina, PacBio and Nanopore platforms. The assembled genome size was 2,405 Mb with a contig N50 of 400.0 kb and a scaffold N50 of 159.4 Mb. In total, 2,311 Mb (96.09%) of the contig sequences was anchored onto 14 chromosomes to form pseudomolecules, and 2,126 Mb (88.43%) was annotated as repetitive sequences. Of the 28,695 predicted protein-coding genes, 26,215 genes (91.4%) could be functionally annotated. On the basis of phylogenetic analysis using 769 genes,C. esculentaandSpirodela polyrhizawere placed on one branch of the tree that diverged approximately 73.23 million years ago. The synteny analyses showed that there have been two whole-genome duplication events inC. esculentaseparated by a relatively short gap. According to comparative genome analysis, a larger number (1,189) of distinct gene families and long terminal repeats were enriched inC. esculenta. Our high-quality taro genome will provide valuable resources for further genetic, ecological and evolutionary analyses of taro or other species in theAraceae.

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