An Ethyl Methanesulfonate-Induced GIF1 Splicing Site Mutation in Sesame Is Associated with Floral Malformation and Small Seed Size
文献类型： 外文期刊
作者： Li, Guiting 1 ; Cao, Hengchun 1 ; Ma, Qin 1 ; Ju, Ming 1 ; Wang, Huili 1 ; Tian, Qiuzhen 1 ; Feng, Xiaoxu 1 ; Zhang, Xintong 1 ; Kong, Jingjing 1 ; Zhang, Haiyang 1 ; Miao, Hongmei 1 ;
作者机构： 1.Henan Acad Agr Sci, Henan Sesame Res Ctr, Zhengzhou 450002, Peoples R China
2.Henan Acad Agr Sci, Henan Sesame Res Ctr, Key Lab Specif Oilseed Crops Genom Henan Prov, Zhengzhou 450002, Peoples R China
关键词：
sesame; flower development; seed size; genome-wide association study;
期刊名称：PLANTS-BASEL （ 影响因子：4.1； 五年影响因子：4.5 ）
ISSN： 2223-7747
年卷期： 2024 年 13 卷 23 期
页码：
收录情况： SCI
摘要： Flower and inflorescence architecture play fundamental roles in crop seed formation and final yield. Sesame is an ancient oilseed crop. Exploring the genetic mechanisms of inflorescence architecture and developmental characteristics is necessary for high-yield breeding improvements for sesame and other crops. In this study, we performed a genetic analysis of the sesame mutant css1 with a malformed corolla and small seed size that was mutagenized by ethyl methanesulfonate (EMS) from the cultivar Yuzhi 11. Inheritance analysis of the cross derived from css1 mutant x Yuzhi 11 indicated that the mutant traits were controlled by a single recessive gene. Based on the genome resequencing of 48 F2 individuals and a genome-wide association study, we determined SNP9_15914090 with the lowest p value was associated with the split corolla and small seed size traits, which target gene Sigif1 (GRF-Interacting Factor 1). SiGIF1 contains four exons and encodes a coactivating transcription factor. Compared to the wild-type allelic gene SiGIF1, Sigif1 in the mutant css1 has a splice donor variant at the exon2 and intron2 junction, which results in incorrect transcript splicing with a 13 bp deletion in exon2. The expression profile indicated that SiGIF1 was highly expressed in the flower, ovary, and capsule but lowly expressed in the root, stem, and leaf tissues of the control. In summary, we identified a gene, SiGIF1, that regulates flower organs and seed size in sesame, which provides a molecular and genetic foundation for the high-yield breeding of sesame and other crops.
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