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Complete genome assembly provides a high-quality skeleton for pan-NLRome construction in melon

文献类型： 外文期刊

作者： Mo, Changjuan 1 ; Wang, Haiyan 1 ; Wei, Minghua 1 ; Zeng, Qingguo 1 ; Zhang, Xuejun 2 ; Fei, Zhangjun 3 ; Zhang, Yongbing 2 ; Kong, Qiusheng 1 ;

作者机构： 1.Huazhong Agr Univ, Coll Hort & Forestry Sci, Natl Key Lab Germplasm Innovat & Utilizat Hort Cro, Wuhan 430070, Peoples R China

2.Xinjiang Acad Agr Sci, Hami melon Res Ctr, Urumqi 830091, Peoples R China

3.Boyce Thompson Inst Plant Res, Ithaca, NY USA

关键词： melon; telomere-to-telomere; gap-free assembly; resistance gene analogs; pan-NLRome

期刊名称：PLANT JOURNAL （ 影响因子：7.2； 五年影响因子：7.9 ）

ISSN： 0960-7412

年卷期： 2024 年

页码：

收录情况： SCI

摘要： Melon (Cucumis melo L.), being under intensive domestication and selective breeding, displays an abundant phenotypic diversity. Wild germplasm with tolerance to stress represents an untapped genetic resource for discovery of disease-resistance genes. To comprehensively characterize resistance genes in melon, we generate a telomere-to-telomere (T2T) and gap-free genome of wild melon accession PI511890 (C. melo var. chito) with a total length of 375.0 Mb and a contig N50 of 31.24 Mb. The complete genome allows us to dissect genome architecture and identify resistance gene analogs. We construct a pan-NLRome using seven melon genomes, which include 208 variable and 18 core nucleotide-binding leucine-rich repeat receptors (NLRs). Multiple disease-related transcriptome analyses indicate that most up-regulated NLRs induced by pathogens are shell or cloud NLRs. The T2T gap-free assembly and the pan-NLRome not only serve as essential resources for genomic studies and molecular breeding of melon but also provide insights into the genome architecture and NLR diversity.

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