Evidence map›Paper›PMID 42350966›Full record

ArticleBMC plant biology2026

Identification and fine mapping of a locus controlling multi-main-stem trait in Brassica napus.

Xiaoting Li, Sihao Zhang, Song Yu, Yingying Ma, Jing Wen, Bin Yi, Chaozhi Ma, Bao Li, Liang Guo, Jinxing Tu

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In one paragraph

Article in BMC plant biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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3 · Its place in the literature

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4 · The record

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5 · Who and what money

Authors and funding

10 authors.

Xiaoting LiNational Key Laboratory of Crop Genetic Improvement, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, China.
Sihao ZhangNational Key Laboratory of Crop Genetic Improvement, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, China.
Song YuNational Key Laboratory of Crop Genetic Improvement, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, China.
Yingying MaNational Key Laboratory of Crop Genetic Improvement, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, China.
Jing WenNational Key Laboratory of Crop Genetic Improvement, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, China.
Bin YiNational Key Laboratory of Crop Genetic Improvement, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, China.
Chaozhi MaNational Key Laboratory of Crop Genetic Improvement, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, China.
Bao LiYuelushan Laboratory, Changsha, 410082, China. libao@hunaas.cn.
Liang GuoNational Key Laboratory of Crop Genetic Improvement, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, China. guoliang@mail.hzau.edu.cn.
Jinxing TuNational Key Laboratory of Crop Genetic Improvement, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, China.

Funding

National Natural Science Foundation of China U25A20672
6 · The paper itself

Abstract

backgroundThe main stem is a crucial component determining individual plant yield in rapeseed (Brassica napus). However, the genetic and developmental basis underlying the multi-main-stem trait remains largely unclear.

resultsIn this study, we identified a multi-main-stem mutant, mms1, which exhibited a significantly increased silique number per plant and abnormal shoot apical meristem (SAM) development. Genetic analysis demonstrated that the multi-main-stem trait was controlled by a recessive gene. Using bulked segregant analysis combined with a Brassica napus 50 K SNP array and map-based cloning, the locus was mapped to a 340-kb interval on chromosome A09 of the ZS11 reference genome and was designated BnaA09.MMS1. Candidate gene analysis revealed that BnaA09G0254500ZS, which harbors sequence variations in both the promoter and coding regions and shows significantly increased expression in the mutant, was the most likely candidate gene. In addition, phytohormone analysis revealed reduced auxin accumulation in mutant SAMs, together with transcriptomic changes in genes associated with the CLAVATA3 (CLV3)-WUSCHEL (WUS) feedback loop.

conclusionsThese findings provide an important foundation for elucidating the genetic basis of the multi-main-stem trait and offer a valuable genetic resource for rapeseed improvement.

Indexed as

Brassica napusPlant StemsQuantitative Trait LociChromosome MappingGene Expression Regulation, PlantGenes, PlantMeristemPhenotypePlant Growth RegulatorsPolymorphism, Single NucleotidePlant Growth RegulatorsBrassica napusCLV3-WUSfine mappingmulti-main-stemshoot apical meristem

Identifiers

PMID42350966
PMCPMC13555992

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