CaGAUT1, a main QTL gene, positively regulates fruit cracking in pepper  

作　　者：Yanli Liu Bohang Shi Dexu Luo Rui Li Zhenhui Gong 

机构地区：[1]College of Horticulture,Northwest A&F University,Yangling,Shaanxi 712100,China [2]Yulin University,Yulin,Shaanxi 719000,China [3]Xuhuai Region Huaiyin Institute of Agricultural Sciences,Huaian,Jiangsu 223001,China

出　　处：《Horticultural Plant Journal》2025年第2期935-938,共4页园艺学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.31772309,31860556 and32460757);National Key R&D Program of China(Grant No.2016YFD0101900)。

摘　　要：Pepper(Capsicum annuum L.)fruit cracking is a common physiological disorder that reduces the quality,shelf life,and commercial value of pepper.However,the physiological and genetic regulatory mechanisms involved in pepper fruit cracking are still unclear.Thus,in this study,we analyzed the physiological changes(pectin,hemicellulose,and cellulose contents)in two parental lines at different fruit developmental stages.Additionally,we constructed a linkage map with 12 linkage groups covering 2041.9 cM utilizing 106 simple sequence repeats(SSRs),and insertion/deletion(InDel)markers.We obtained a novel QTL,fc1.1,explained 23.36%of the phenotypic variation in the fruit cracking genotype,and the genetic distance was 7.99 c M,covering 136 predicted genes.The fc1.1 region contains one potential candidate gene,Capana01g001333(CaGAUT1),involved in pectin anabolism.The real-time quantitative PCR(qRT-PCR),virus-induced gene silencing(VIGS),and cluster analysis confirmed that CaGAUT1 is a functional resistance gene for pepper fruit cracking.Our study lays a foundation for understanding the genetic and molecular mechanisms for pepper fruit cracking.

关 键 词：FIR PEPPER LINKAGE 

分 类 号：S641.3[农业科学—蔬菜学]