Two haplotype-resolved genome assemblies for AAB allotriploid bananas provide insights into banana subgenome asymmetric evolution and Fusarium wilt control

文献类型： 外文期刊

第一作者： Xie, Wen-Zhao

作者： Xie, Wen-Zhao;He, Weidi;Bi, Fangcheng;Li, Yaoyao;Dou, Tongxin;Deng, Guiming;Liu, Siwen;Li, Chunyu;Yang, Qiaosong;Hu, Chunhua;Gao, Huijun;Dong, Tao;Yi, Ganjun;Sheng, Ou;Xie, Wen-Zhao;Zhou, Run;Guo, Yi-Xiong;Zhang, Wenhui;Sanz-Jimenez, Pablo;Zhou, Zhi-Wei;Feng, Jia-Wu;Zhang, Jianwei;Yuan, Min-Hui;Zhu, Xi-Tong;Xu, Xin-Dong;Zhou, Zu-Wen;Cai, Wenguo;Song, Jia-Ming;Chen, Ling-Ling;Dang, Jiangbo;Guo, Qigao

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关键词： bananas; Plantain; Silk; asymmetric evolution; homologous exchange; Fusarium wilt

期刊名称：PLANT COMMUNICATIONS （ 影响因子：10.5； 五年影响因子：10.5 ）

ISSN： 2590-3462

年卷期： 2024 年 5 卷 2 期

页码：

收录情况： SCI

摘要： Bananas (Musa spp.) are one of the world's most important fruit crops and play a vital role in food security for many developing countries. Most banana cultivars are triploids derived from inter- and intraspecific hybridizations between the wild diploid ancestor species Musa acuminate (AA) and M. balbisiana (BB). We report two haplotype-resolved genome assemblies of the representative AAB-cultivated types, Plantain and Silk, and precisely characterize ancestral contributions by examining ancestry mosaics across the genome. Widespread asymmetric evolution is observed in their subgenomes, which can be linked to frequent homologous exchange events. We reveal the genetic makeup of triploid banana cultivars and verify that subgenome B is a rich source of disease resistance genes. Only 58.5% and 59.4% of Plantain and Silk genes, respectively, are present in all three haplotypes, with >50% of genes being differentially expressed alleles in different subgenomes. We observed that the number of upregulated genes in Plantain is significantly higher than that in Silk at one -week post -inoculation with Fusarium wilt tropical race 4 (Foc TR4), which confirms that Plantain can initiate defense responses faster than Silk. Additionally, we compared genomic and transcriptomic differences among the genes related to carotenoid synthesis and starch metabolism between Plantain and Silk. Our study provides resources for better understanding the genomic architecture of cultivated bananas and has important implications for Musa genetics and breeding.

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