Deletion of a 1,049 bp sequence from the 5 UTR upstream of the SiHEC3 gene induces a seed non-shattering mutation in sesame
文献类型： 外文期刊
作者： Ju, Ming 1 ; Li, Guiting 1 ; Tian, Qiuzhen 1 ; Cao, Hengchun 1 ; Ma, Qin 1 ; Duan, Yinghui 1 ; Guo, Hui 1 ; Zhang, Zhanyou 1 ; Huang, Yingying 1 ; Wang, Huili 1 ; Zhang, Haiyang 1 ; Miao, Hongmei 1 ;
作者机构： 1.Shennong Lab, Zhengzhou 450002, Peoples R China
2.Henan Acad Agr Sci, Henan Sesame Res Ctr, Zhengzhou 450002, Peoples R China
3.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 ( Sesamum indicum L.); association mapping; seed shattering; structure variation; bHLH transcription factor
期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：4.6； 五年影响因子：4.5 ）
ISSN： 2095-3119
年卷期： 2024 年 23 卷 8 期
页码：
收录情况： SCI
摘要： Sesame is a labor intensive crop with limited mechanized harvesting mainly due to the seed shattering (SS) trait. In this study, we performed a genetic analysis of the seed-shattering resistance (SR) trait with a SR sesame mutant 12M07. . Unlike the SS type, the parenchyma cells in the abscission zone of the 12M07 mutant are arranged loosely but adhere to the seed coat. Inheritance analysis of six generations derived from 12M07 (SR)xXiangcheng Dazibai (SS) showed that the SR trait is recessive and controlled by a single gene pair. Association mapping of the F2 2 population with 888,619 variants (single-nucleotide polymorphisms (SNPs) and insertion-deletion (InDels)) and 31,884 structural variations (SVs) determined that only SV12002 in the 5" upstream region of gene Sindi0765000 (named SiHEC3) ) in Chr.3 was significantly associated with the SR trait. SiHEC3 encodes the bHLH transcription factor. A 1,049 bp deletion occurred in the 5" UTR of Sihec3 in 12M07. . SiHEC3 is mainly expressed in developing placental tissues, with the expression peaking in capsules at 45 days after pollination. A dual-luciferase reporter assay in tobacco confirmed that the promoter activity of Sihec3 was reduced because of the deletion of the 1,049 bp promoter sequence. Protein-protein interaction network analysis showed that HEC3 is co-expressed with nine key proteins, such as SHATTERPROOF1 (SHP1) and SEEDSTICK (STK) which participate in the secondary wall biosynthesis of the abscission layer in plants. The findings of this study show the important function of Sihec3 corresponding with the SR trait and supply the genetic information for breeding new varieties that are amenable to mechanized harvesting in sesame and other crops.
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