文献类型： 外文期刊
作者： Zhao, Xianxin 1 ; Xu, Hongxing 3 ; He, Kang 1 ; Shi, Zhenmin 1 ; Chen, Xi 1 ; Ye, Xinhai 1 ; Mei, Yang 1 ; Yang, Yajun 3 ; L 1 ;
作者机构： 1.Zhejiang Univ, State Key Lab Rice Biol, Hangzhou 310058, Peoples R China
2.Zhejiang Univ, Minist Agr & Rural Affairs, Key Lab Mol Biol Crop Pathogens & Insect Pests, Inst Insect Sci, Hangzhou 310058, Peoples R China
3.Zhejiang Acad Agr Sci, Inst Plant Protect & Microbiol, State Key Lab Managing Biot & Chem Treats Qual &, Hangzhou, Peoples R China
4.Yichun Univ, Coll Life Sci & Resource Environm, Key Lab Crop Growth & Dev Regulat Jiangxi Prov, Yichun, Peoples R China
5.Yunnan Acad Agr Sci, Agr Environm & Resources Inst, Kunming, Yunnan, Peoples R China
关键词： chromosome‐ level genome; Cnaphalocrocis medinalis; comparative genomics; genome synteny; migration; rice leaffolder
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： The rice leaffolder, Cnaphalocrocis medinalis Guenee (Crambidae, Lepidoptera), is an important agricultural pest that causes serious losses to rice production in rice-growing regions with high humidity and temperature. However, a lack of genomic resources limits in-depth understanding of its biological characteristics and ecological adaptation. Here, we sequenced the genome of rice leaffolder using the Illumina and PacBio platforms, yielding a genome assembly of 528.3 Mb with a contig N50 of 524.6 kb. A high percentage (96.4%) of Benchmarking Universal Single-Copy Orthologs (BUSCOs) were successfully detected, suggesting high-level completeness of the genome assembly. In total, 39.5% of the genome consists of repeat sequences and 15,045 protein-coding genes were annotated. Comparative phylogenomic analysis showed that some gene families associated with hormone biosynthesis expanded in rice leaffolder. Next, we used the Hi-C technique to produce a chromosome-level genome assembly with a scaffold N50 of 16.1 Mb by anchoring 3,248 scaffolds to 31 chromosomes. The rice leaffolder genome showed high chromosomal synteny with the genome of four other lepidopteran insects. By comparing coverage ratios from the genome resequencing of male and female pupae, we identified near intact Z and W chromosomes. The W chromosome is estimated as 20.75 Mb, which is the most complete known W chromosome in Lepidoptera. The protein-coding genes on the W chromosome were significantly enriched in metabolic pathways. In all, the high-quality genome assembly and the near-intact W chromosome of rice leaffolder should be a useful resource for the fields of insect migration, chromosome evolution and pest control.
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