Identification and Fine Mapping of the Candidate Gene Controlling Multi-Inflorescence in Brassica napus

被引:5
|
作者
Lu, Hongchen [1 ]
Wu, Hanfei [1 ]
Zhu, Guangfeng [1 ]
Yin, Caijun [1 ]
Zhao, Lun [1 ]
Wen, Jing [1 ]
Yi, Bin [1 ]
Ma, Chaozhi [1 ]
Tu, Jinxing [1 ]
Fu, Tingdong [1 ]
Shen, Jinxiong [1 ]
机构
[1] Huazhong Agr Univ, Coll Plant Sci & Technol, Natl Ctr Rapeseed Improvement Wuhan, Natl Key Lab Crop Genet Improvement, Wuhan 430070, Peoples R China
关键词
multi-inflorescence; Brassica napus; gene mapping; shoot apical meristem; APICAL MERISTEM MAINTENANCE; FINGER PROTEIN; SHOOT; GENOME; ARCHITECTURE; CONTRIBUTES; INITIATION; IDENTITY; ENCODES; FLOWER;
D O I
10.3390/ijms23137244
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
As a desirable agricultural trait, multi-inflorescence (MI) fulfills the requirement of mechanized harvesting and yield increase in rapeseed (Brassica napus L.). However, the genetic mechanism underlying the multi-inflorescence trait remain poorly understood. We previously identified a difference of one pair of dominant genes between the two mapping parental materials. In this study, phenotype and expression analysis indicated that the imbalance of the CLAVATA (CLV)-WUSCHEL (WUS) feedback loop may contribute to the abnormal development of the shoot apical meristem (SAM). BnaMI was fine-mapped to a 55 kb genomic region combining with genotype and phenotype of 5768 BCF1 individuals using a traditional mapping approach. Through comparative and expression analyses, combined with the annotation in Arabidopsis, five genes in this interval were identified as candidate genes. The present findings may provide assistance in functional analysis of the mechanism associated with multi-inflorescence and yield increase in rapeseed.
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页数:12
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