Gene Mapping of a Mutant Mungbean (Vigna radiata L.) Using New Molecular Markers Suggests a Gene Encoding a YUC4-like Protein Regulates the Chasmogamous Flower Trait
文献类型： 外文期刊
作者： Chen, Jingbin 1 ; Somta, Prakit 2 ; Chen, Xin 1 ; Cui, Xiaoyan 1 ; Yuan, Xingxing 1 ; Srinives, Peerasak 2 ;
作者机构： 1.Jiangsu Acad Agr Sci, Inst Vegetable Crops, Nanjing, Jiangsu, Peoples R China
2.Kasetsart Univ, Dept Agron, Fac Agr Kamphaeng Saen, Nakhon Pathom, Thailand
关键词： mungbean;Vigna radiata;chasmogamy;outcrossing;gene mapping;hybrid development
期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）
ISSN： 1664-462X
年卷期： 2016 年 7 卷
页码：
收录情况： SCI
摘要： Mungbean (Vigna radiata L.) is a cleistogamous plant in which flowers are pollinated before they open, which prevents yield improvements through heterosis. We previously generated a chasmogamous mutant (CM) mungbean in which open flowers are pollinated. In this study, we developed insertion/deletion (indel) markers based on the transcriptome differences between CM and Sulu-1 (i.e., normal flowering) plants. An F-2 population derived from a cross between CM and Sulu-1 was used for gene mapping. Segregation analyses revealed that a single recessive gene regulates the production of chasmogamous flowers. Using newly developed indel and simple sequence repeat markers, the cha gene responsible for the chasmogamous flower trait was mapped to a 277.1-kb segment on chromosome 6. Twelve candidate genes were detected in this segment, including Vradi06g12650, which encodes a YUCCA family protein associated with floral development. A single base pair deletion producing a frame-shift mutation and a premature stop codon in Vradi06g12650 was detected only in CM plants. This suggested that Vradi06g12650 is a cha candidate gene. Our results provide important information for the molecular breeding of chasmogamous mungbean lines, which may serve as new genetic resources for hybrid cultivar development.
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