Journal of Integrative Agriculture ›› 2023, Vol. 22 ›› Issue (10): 2981-2992.DOI: 10.1016/j.jia.2023.02.017

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一个控制油菜半矮杆性状的主效新位点BnaSD.C3的精细定位及候选基因分析

  

  • 收稿日期:2022-10-09 接受日期:2023-01-12 出版日期:2023-10-20 发布日期:2023-02-15

BnaSD.C3 is a novel major quantitative trait locus affecting semi-dwarf architecture in Brassica napus L.

WANG Xiao-dong1, 2*, CAI Ying2*, PANG Cheng-ke1, 2, ZHAO Xiao-zhen1, SHI Rui1, LIU Hong-fang2, CHEN Feng1, ZHANG Wei1, FU San-xiong1, HU Mao-long1, HUA Wei2, ZHENG Ming2#, ZHANG Jie-fu1#   

  1. 1 Provincial Key Laboratory of Agrobiology/Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences/Key Laboratory of Cotton and Rapeseed, Ministry of Agriculture and Rural Affairs, Nanjing 210014, P.R.China
    2 Oil Crops Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Wuhan 430062, P.R.China
  • Received:2022-10-09 Accepted:2023-01-12 Online:2023-10-20 Published:2023-02-15
  • About author:WANG Xiao-dong, E-mail: xdwang120@163.com; CAI Ying, E-mail: caiying19960317@126.com; #Correspondence ZHANG Jie-fu, Tel: +86-25-84390657, E-mail: jiefu_z@163.com; ZHENG Ming, E-mail: zhengming@caas.cn * These authors contributed equally to this study.
  • Supported by:

    The work was supported by the National Natural Science Foundation of China (32172065 and 32172095), the earmarked Fund for China Agriculture Research System (CARS-12), the Central Public-interest Scientific Institution Basal Research Fund, China (Y2022QC21) and the Jiangsu Collaborative Innovation Center for Modern Crop Production, China.  

摘要:

株高是影响甘蓝型油菜产量、收获指数和抗倒伏性的关键株型特征,然而,油菜株高的遗传调控机制仍不清楚。本研究利用EMS诱变获得了一个半矮杆突变体df34遗传分析结果表明,df34半矮杆性状由一半显性基因控制。利用BSA-Seq方法将目的基因定位到C3染色体上命名为BnaSD.C3。随后,利用图位克隆的方法,将BnaSD.C3精细定位到“Darmor-bzh基因组的297.35 kb区间内。然而,在“Darmor-bzh基因组上的这一区间内,没有潜在的调控株高性状候选基因结合基因组重测序、转录组测序、植物激素分析、结构变异分析和基因功能注释等信息,在“ZS11”参考基因组上,发现BnaC03G0466900ZSBnaC03G0478900ZSBnaSD.C3的重要候选基因。研究为甘蓝型油菜矮化及株型育种提供了新的基因资源,为解析甘蓝型油菜株高的遗传调控机制提供了新的见解。

Abstract:

Plant height is a key plant architectural trait that affects the seed yield, harvest index and lodging resistance in Brassica napus L., although the genetic mechanisms affecting plant height remain unclear.  Here, a semi-dwarf mutant, df34, was obtained by ethyl methanesulphonate-induced mutagenesis.  Genetic analysis showed that the semi-dwarf phenotype is controlled by one semi-dominant gene, which was located on chromosome C03 using a bulked segregant analysis coupled with whole-genome sequencing, and this gene was named BnaSD.C3.  Then BnaSD.C3 was fine-mapped to a 297.35-kb segment of the “Darmor-bzh” genome, but there was no potential candidate gene for the semi-dwarf trait underlying this interval.  Furthermore, the interval was aligned to the Zhongshuang 11 reference genome.  Finally, combining structural variation analysis, transcriptome sequencing, phytohormone analyses and gene annotation information, BnaC03G0466900ZS and BnaC03G0478900ZS were determined to be the most likely candidate genes affecting the plant height of df34.  This study provides a novel major locus for breeding and new insights into the genetic architecture of plant height in Bnapus

Key words: Brassica napus L. ,  fine mapping ,  phytohormone analysis ,  plant height ,  transcriptome analysis