Mutations in the CDS and promoter of BjuA07.CLV1 cause a multilocular trait in Brassica juncea
文献类型： 外文期刊
作者： Xiao, Lu 1 ; Li, Xin 1 ; Liu, Fei; Zhao, Zhi 1 ; Xu, Liang 1 ; Chen, Cuiping 1 ; Wang, Yanhua 2 ; Shang, Guoxia; Du, D 1 ;
作者机构： 1.Qinghai Univ, Qinghai Acad Agr & Forestry Sci, Qinghai Res Branch,Key Lab Qinghai Prov Spring Ra, Natl Rapeseed Genet Improvement Ctr,State Key Lab, Xining 810016, Qinghai, Peoples R China
2.Qinghai Univ, Qinghai Acad Agr & Forestry Sci, Qinghai Res Branch,Key Lab
期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）
ISSN： 2045-2322
年卷期： 2018 年 8 卷
页码：
收录情况： SCI
摘要： Multilocular trait has recently attracted considerable attention for its potential to increase yield. Our previous studies indicated that two genes (Bjln1 and Bjln2) are responsible for multilocular siliques in Brassica juncea and the Bjln1 gene has been delimited to a 208-kb region. In present study, the Bjln1 gene was successfully isolated using the map-based cloning method. Complementation test indicated that the BjuA07. CLV1 (equivalent to BjLn1) could rescue the multilocular phenotype and generate bilocular siliques. Two amino acids changes at positions 28 and 63 in BjuA07. clv1 as well as a 702-bp deletion in its promoter have been proved to affect the carpel numbers. Microscopic analyses suggested that BjuA07. CLV1 is involved in the maintenance of shoot and floral meristem size. The expression level of BjuA07. clv1 was significantly reduced in the SAM. Furthermore, WUS, CLV2, CLV3, RPK2 and POL, key genes in the CLV/WUS signal pathway, showed lower expression level in the multilocular plants. These data suggest that the mutations in the CDS and promoter of BjuA07. clv1 reduced its function and expression level, which disturbed CLV/WUS signal pathway, thereby leading to the enlargement of the shoot and floral meristem and resulting in the multilocular siliques.
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