Chromosome-level genome assemblies of Musa ornata and Musa velutina provide insights into pericarp dehiscence and anthocyanin biosynthesis in banana

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外文摘要：Musa ornata and Musa uelutina are members of the Musaceae family and are indigenous to the South and Southeast Asia.They are very popular in the horticultural market,but the lack of genomic sequencing data and genetic studies has hampered efforts to improve their ornamental value.In this study,we generated the first chromosome-level genome assemblies for both species by utilizing Oxford Nanopore long reads and Hi-C reads.The genomes of M.ornata and M.velutina were assembled into 11 pseudochromosomes with genome sizes of 427.85 Mb and 478.10 Mb,respectively.Repetitive sequences comprised 46.70％and 50.91％of the total genomes for M.ornata and M.uelutina,respectively.Differentially expressed gene(DEG)and Gene Ontology(GO)enrichment analyses indicated that upregulated genes in the mature pericarps of M.velutina were mainly associated with the saccharide metabolic processes,particularly at the cell wall and extracellular region.Furthermore,we identified polygalacturonase(PG)genes that exhibited higher expression level in mature pericarps of M.velutina compared to other tissues,potentially being accountable for pericarp dehiscence.This study also identified genes associated with anthocyanin biosynthesis pathway.Taken together,the chromosomal-level genome assemblies of M.ornata and M.velutina provide valuable insights into the mechanism of pericarp dehiscence and anthocyanin biosynthesis in banana,which will significantly contribute to future genetic and molecular breeding efforts.

作者：

Tian-Wen Xiao、Xin Liu、Ning Fu、Tong-Jian Liu、Zheng-Feng Wang、Xue-Jun Ge、Hui-Run Huang

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作者单位：

Key Laboratory of National Forestry and Grassland Administration on Plant Conservation and Utilization in Southern China,South China Botanical Garden,Chinese Academy of Sciences,Guangzhou 510650,China

South China National Botanical Garden,Guangzhou 510650,China

University of Chinese Academy of Sciences,Beijing 100049,China

Guangdong Provincial Key Laboratory of Applied Botany,South China Botanical Garden,Chinese Academy of Sciences,Guangzhou 510650,China

Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems,South China Botanical Garden,Chinese Academy of Sciences,Guangzhou,510650,China

State Key Laboratory of Plant Diversity and Specialty Crops,South China Botanical Garden,Chinese Academy of Sciences,Guangzhou 510650,China

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基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of China

项目编号：

3207023731261140366

出版年：

2024

DOI：

10.1093/hr/uhae079

园艺研究(英文)

CSTPCD

ISSN：

年,卷(期)：2024.11(5)