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Genome-wide association studies reveal genetic diversity and regulatory loci underlying dwarfing traits in banana

文献类型： 外文期刊

作者： Li, Yuqi 1 ; Feng, Junting 2 ; Yan, Liu 1 ; Wei, Shouxing 4 ; Hu, Huigang 5 ; Liu, Juhua 2 ; Xie, Yixian 6 ; Cai, Bingyu 2 ; Li, Kai 2 ; Zhao, Yankun 2 ; Chen, Yufeng 2 ; Cheng, Qifeng 2 ; Cao, Miaomiao 2 ; Wang, Yi 1 ; Wei, Yongzan 2 ; Li, Wei 1 ; Wang, Wei 2 ; Xie, Jianghui 2 ; Han, Zhenhai 1 ;

作者机构： 1.China Agr Univ, Sanya Inst, Sanya 572000, Peoples R China

2.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Natl Key Lab Biol Breeding Trop Crops, Haikou 571101, Peoples R China

3.China Agr Univ, Inst Hort Plants, Beijing 100193, Peoples R China

4.Chinese Acad Trop Agr Sci CARTA, Trop Crops Genet Resources Inst, Danzhou 571737, Peoples R China

5.Chinese Acad Trop Agr, South Subtrop Crop Res Inst, Natl Field Genebank Trop Fruit, Key Lab Trop Fruit Biol,Minist Agr, Zhanjiang 524091, Peoples R China

6.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Key Lab Biol & Genet Resources Trop Crops, Minist Agr,Hainan Inst Trop Agr Resources, Haikou 571101, Peoples R China

关键词： GWAS; hormone; molecular marker; Musa; plant height

期刊名称：JOURNAL OF INTEGRATIVE PLANT BIOLOGY （ 影响因子：9.3； 五年影响因子：10.8 ）

ISSN： 1672-9072

年卷期： 2025 年

页码：

收录情况： SCI

摘要： Bananas (Musa ssp.) are globally important staple crops increasingly constrained by biotic stressors, climatic instability, and the high labor demands of cultivation. The genetic improvement of dwarf phenotypes offers a strategic pathway to enhance mechanization and reduce production costs. In this study, we have carried out whole-genome resequencing of 300 Musa accessions to analyze genome-wide allelic diversity and identify loci associated with shoot architecture. Our analysis uncovered extensive genetic variation within the A subgenome, pivotal for environmental adaptability, and detected introgression from Musa itinerans (subgroup A) into cultivated varieties (subgroup F), suggesting a broadened genetic base amenable to breeding. A genome-wide association study (GWAS) pinpointed MabHLH30 as a crucial gene associated plant stature. Functional validation confirmed MabHLH30 as a critical regulator of plant stature and leaf morphology. Leveraging this finding, we developed molecular markers for MabHLH30, enabling marker-assisted selection (MAS) to accelerate the breeding of compact, high-yielding cultivars. Collectively, these results provide a genomic framework for the targeted improvement of banana architecture and represent a valuable resource for cultivar development under diverse agroecological conditions.

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