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Telomere-to-telomere haplotype-resolved reference genome reveals subgenome divergence and disease resistance in triploid Cavendish banana

文献类型： 外文期刊

作者： Huang, Hui-Run 1 ; Liu, Xin 1 ; Arshad, Rida 4 ; Wang, Xu 4 ; Li, Wei-Ming 5 ; Zhou, Yongfeng 4 ; Ge, Xue-Jun 1 ;

作者机构： 1.Chinese Acad Sci, Key Lab Plant Resources Conservat & Sustainable Ut, South China Bot Garden, Guangzhou 510650, Peoples R China

2.South China Natl Bot Garden, Guangzhou 510650, Peoples R China

3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

4.Chinese Acad Agr Sci, Agr Genom Inst Shenzhen, State Key Lab Trop Crop Breeding, Shenzhen Branch,Guangdong Lab Lingnan Modern Agr,M, Shenzhen 518120, Peoples R China

5.Guangxi Univ Nationalities, Sch Marine Sci & Biotechnol, Nanning 530008, Peoples R China

6.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, State Key Lab Trop Crop Breeding, Haikou 571101, Peoples R China

期刊名称：HORTICULTURE RESEARCH （ 影响因子：8.7； 五年影响因子：9.0 ）

ISSN： 2662-6810

年卷期： 2023 年 10 卷 9 期

页码：

收录情况： SCI

摘要： Banana is one of the most important crops of the world. Cavendish-type bananas, which have a monospecific Musa acuminata origin (AAA), account for around half of the global banana production, thereby are of great significance for human societies. However, until now, the high-quality haplotype-resolved reference genome was still undecoded for banana cultivars. Here, we reported the telomere-to-telomere (T2T) and haplotype-resolved reference genome of 'Baxijiao' (Cavendish) consisting of three haploid assemblies. The sizes of the three haploid assemblies were estimated to be 477.16 Mb, 477.18 Mb, and 469.57 Mb, respectively. Although with monospecific origins, the three haploid assemblies showed great differences with low levels of sequence collinearity. Several large reciprocal translocations were identified among chromosomes 1, 4, and 7. An expansion of gene families that might affect fruit quality and aroma was detected, such as those belonging to sucrose/disaccharide/oligosaccharide catabolic processes, sucrose metabolic process, starch metabolic process, and aromatic compound biosynthetic process. Besides, an expansion of gene families related to anther and pollen development was observed, which could be associated with parthenocarpy and sterility of the Cavendish cultivar. Finally, much fewer resistance genes were identified in 'Baxijiao' than in M. acuminata, particularly in the gene clusters in chromosomes 3 and 10, providing potential targets to explore for molecular analysis of disease resistance in banana. This T2T haplotype-resolved reference genome will thus be a valuable genetic resource for biological studies, molecular breeding, and genetic improvement of banana.

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