华北农学报 ›› 2020, Vol. 35 ›› Issue (3): 168-177. doi: 10.7668/hbnxb.20190761

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抗感菌核病甘蓝型油菜近等基因系盛花期叶片转录组比较分析

张秋平1, 文李2, 张振乾1, 王峰1, 官春云1   

  1. 1. 湖南农业大学 农学院, 油料改良中心湖南分中心, 湖南 长沙 410128;
    2. 长沙理工大学 化学与食品工程学院, 湖南 长沙 410114
  • 收稿日期:2019-12-20 出版日期:2020-06-28
  • 通讯作者: 王峰(1981-),男,湖南长沙人,副教授,博士,主要从事油菜栽培与育种研究;官春云(1938-),男,湖北荆州人,教授,博士生导师,主要从事油菜栽培与育种研究。
  • 作者简介:张秋平(1980-),女,湖南浏阳人,讲师,博士,主要从事油菜育种与抗病分子机理研究。
  • 基金资助:
    国家自然科学基金项目(31601339);湖南省教育厅一般项目(16C0780);湖南农业大学青年基金(15QN14)

Comparative Transcriptomic Analysis of Brassica napus Near-isogenic Line Resistant to Sclerotinia sclerotirium at Flowering Stage

ZHANG Qiuping1, WEN Li2, ZHANG Zhenqian1, WANG Feng1, GUAN Chunyun1   

  1. 1. College of Agriculture, Hunan Agricultural University, Hunan Branch of National Oilseed Crop Improvement Center, Changsha 410128, China;
    2. School of Chemistry and Food Engineering, Changsha University of Science and Technology, Changsha 410114, China
  • Received:2019-12-20 Published:2020-06-28

摘要: 为了研究甘蓝型油菜与菌核病病原核盘菌互作的分子机制,挖掘分别与甘蓝型油菜抗、感病相关的基因,以高抗菌核病品种湘油15(Xiangyou 15)及其感病的近等基因系98C40NL为材料,利用转录组测序技术(RNA-Seq)对2个品种盛花期叶片接种核盘菌前及接种后12,24 h差异表达基因进行了分析,并采用实时荧光定量PCR技术对部分基因表达进行验证。测序得到34.16 G Clean bases,6个样本中共鉴定出78 582个基因。相对于高感品种,湘油15在3个时间点共有1 296个基因下调表达,1 495个基因上调表达;54个基因在3个时间点都表现显著差异,其中18个基因在3个时间点都下调,27个基因在3个时间点都上调。差异基因主要富集在氧化还原、植物激素信号转导、钙信号通路、苯丙烷类代谢、次生代谢产物合成等途径。通过荧光定量PCR验证,BnaA03g09060DBnaA01g26640DBnaA03g09090DBnaA04g12120DBnaA01g26920D 5个基因在高抗品种的表达显著高于高感品种,可能与寄主植物防御核盘菌的侵染有关;BnaA06g10010DBnaA09g16180DBnaAnng19580DBnaC01g40400D、和BnaC06g05340D 5个基因则在高感品种中表达显著高于高抗品种,可能与核盘菌感病受体相关。研究结果为解析油菜与核盘菌互作机理及挖掘菌核病抗性和受体基因提供参考依据。

关键词: 甘蓝型油菜, 菌核病, 转录组, 差异表达基因, 功能

Abstract: A transcriptome comparisons of two genotypes of Brassica napus with different resistant ability against Sclerotinia sclerotirium, Xiangyou 15 with high resistance and its near-isogenic line 98C40NL with high susceptibility, were conducted by RNA-Seq in order to study the molecular mechanism of the interaction between B. napus and S. Sclerotirium and find out genes relevant with resistance and susceptibility respectively. The differentially expressed genes before inoculation with S.Sclerotirium,and 12,24 h after infection were analysed, followed by a qRT-PCR verification of gene expression. Totally, 34.16 G Clean bases and 78 582 genes were obtained through RNA-Seq. The results showed that 1 296 genes were down regulated while 1 495 genes were up regulated in Xiangyou 15 compared to 98C40NL. 54 genes expressed differentially in all of the three time points, 18 of which were down regulated and 27 genes were up regulated. The differentially expressed genes enriched in pathways related to oxidation-reduction, plant hormone signal transduction, calcium signal transduction,phenylpropane metabolism and synthesis of secondary metabolites. qRT-PCR results revealed that the genes with abundant expression in high resistant cultivar including BnaA03g09060D, BnaA01g26640D, BnaA03g09090D, BnaA04g12120D, and BnaA01g26920D could be related to resistance. However, genes BnaA06g10010D, BnaA09g16180D, BnaAnng19580D, BnaC01g40400D, and BnaC06g05340D might be connected with susceptibility, showing high expression in 98C40NL. The results can provide clue for the mechanism analysis of interactions between B. napus and S.sclerotirium and provide candidate genes for screening related resistance and receptor genes.

Key words: Brassica napus, Sclerotinia sclerotirium, Transcriptome, Differentially expressed genes, Function

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引用本文

张秋平, 文李, 张振乾, 王峰, 官春云. 抗感菌核病甘蓝型油菜近等基因系盛花期叶片转录组比较分析[J]. 华北农学报, 2020, 35(3): 168-177. doi: 10.7668/hbnxb.20190761.

ZHANG Qiuping, WEN Li, ZHANG Zhenqian, WANG Feng, GUAN Chunyun. Comparative Transcriptomic Analysis of Brassica napus Near-isogenic Line Resistant to Sclerotinia sclerotirium at Flowering Stage[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2020, 35(3): 168-177. doi: 10.7668/hbnxb.20190761.

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