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园艺学报 ›› 2025, Vol. 52 ›› Issue (6): 1505-1518.doi: 10.16420/j.issn.0513-353x.2024-0315

• 遗传育种·种质资源·分子生物学 • 上一篇    下一篇

基于RNA-Seq筛选调控马铃薯熟性的候选基因

李姿燕1,2, 陈炜曦1,2, 李子涵1,2, 黎茵1,2, 梁峰铭5, 曾祥利5, 荐红举1,2,3,4,*(), 吕典秋1,2,3,4,*()   

  1. 1 西南大学,西部(重庆)科学城种质创制大科学中心,重庆 400715
    2 西南大学农学与生物科技学院,重庆 400715
    3 西南大学,南方山地农业教育部工程研究中心,重庆 400715
    4 西南大学,薯类生物学与遗传育种重庆市重点实验室,重庆 400715
    5 巫溪县薯光农业科技发展有限公司,重庆 405899
  • 收稿日期:2025-01-20 修回日期:2025-03-06 出版日期:2025-06-20 发布日期:2025-06-20
  • 通讯作者:
  • 基金资助:
    国家重点研发计划项目(2022YFD1201600); 国家自然科学基金项目(32101659); 重庆市现代农业产业技术体系项目(CQMAITS202303); 西南大学人才引进项目(SWU019008); 中央高校基本科研业务费专项(SWU-KT22036)

Screening Candidate Genes Controlling Potato Maturation Time Based on RNA-Seq

LI Ziyan1,2, CHEN Weixi1,2, LI Zihan1,2, LI Yin1,2, LIANG Fengming5, ZENG Xiangli5, JIAN Hongju1,2,3,4,*(), and LÜ Dianqiu1,2,3,4,*()   

  1. 1 Integrative Science Center of Germplasm Creation in Western China(Chongqing)Science City,Southwest University,Chongqing 400715,China
    2 College of Agronomy and Biotechnology,Southwest University,Chongqing 400715,China
    3 Engineering Research Center of South Upland Agriculture,Ministry of Education,Southwest University,Chongqing 400715,China
    4 Chongqing Key Laboratory of Biology and Genetic Breeding for Tuber and Root Crops,Southwest University,Chongqing 400715,China
    5 Wuxi County Shuguang Agricultural Science and Technology Development Co.,Ltd.,Chongqing 405899,China
  • Received:2025-01-20 Revised:2025-03-06 Published:2025-06-20 Online:2025-06-20

摘要: 以早熟品种‘早大白’‘中薯5号’‘鄂马铃薯3号’与中晚熟品种‘大西洋’和‘青薯9号’为材料,分析了马铃薯顶端分生组织发育与结薯时间的关系,并利用RNA-Seq技术研究早大白与青薯9号差异表达基因的功能及可能参与的调控通路。结果表明,相比晚熟品种,早熟品种的顶端分生组织向生殖生长转变更早。转录组测序共鉴定出差异表达基因2 842个,其中与激素相关的基因85%集中在激素信号转导途径,特别是生长素(IAA)、脱落酸(ABA)和茉莉酸(JA)等通路;另外,筛选到127个差异表达基因编码转录因子,分布在35个转录因子家族。GO和KEGG富集分析发现差异表达基因主要富集在光合作用、对激素的响应、植物昼夜节律、淀粉和蔗糖代谢、植物激素信号转导等过程。挑选20个可能影响马铃薯结薯早晚的候选基因进行荧光定量PCR验证。其中参与昼夜节律通路的基因FTHY5,参与淀粉和蔗糖代谢通路的基因BGLU17CWIN2GH9B13在早大白中高表达;参与植物激素信号转导或合成代谢的基因GH3RD22HB16CYP74A在早大白中高表达,而IAA17MES1RCA在青薯9号中高表达。此外,在早大白中高表达的GRP3可能通过影响生长发育从而调控马铃薯结薯早晚。这些基因可能通过调控光周期响应、激素信号转导、蔗糖水平等在马铃薯中发挥作用,从而影响马铃薯熟性。

关键词: 马铃薯, 转录组测序, 熟性, 顶端分生组织, 差异基因, 光周期, 激素, 蔗糖

Abstract:

In this study,early maturing cultivars‘Zaodabai’‘Zhongshu5’‘Eshu3’,middle late maturing cultivar ‘Atlantic’and late maturing cultivar‘Qingshu 9’were used to analyze the relationship between potato apical meristem development and tuberization time,Zaodabai and Qingshu 9 were also taken to study the function of differentially expressed genes as well as the possible regulatory pathways involved by RNA-Seq. Results showed that the apical meristem turned to reproductive growth earlier in early maturing cultivars than late maturing cultivars. A total of 2 842 differentially expressed genes were identified in transcriptome sequencing,85% of which related to hormones were concentrated in hormone signal transduction pathways and showed rich expression differences,especially in IAA,ABA,JA and other pathways. Besides,a total of 127 differentially expressed transcription factor genes were identified,distributed in 35 transcription factor families. GO and KEGG enrichment analysis showed that differentially expressed genes were mainly concentrated in photosynthesis,hormone response,plant circadian rhythm,starch and sucrose metabolism,and plant hormone signal transduction. The 20 candidate genes that may affect the early and late tuberization of potato were selected for qRT-PCR verification. The genes involved in the circadian rhythm pathway,FT and HY5,were highly expressed in Zaodabai. Genes involved in the starch and sucrose metabolic pathway,BGLU17CWIN2 and GH9B13 were highly expressed in Zaodabai. GH3RD22HB16 and CYP74A involved in plant hormone signal transduction or anabolism were highly expressed in Zaodabai,while IAA17MES1 and RCA were highly expressed in Qingshu 9. In addition,GRP3 which highly expressed in Zaodabai may also affect tuberization time. These genes may play a role in potato by regulating photoperiodic response,hormone signal transduction,sucrose level,etc.,thus affecting potato tuberization time.

Key words: potato, transcriptome sequencing, maturation, apical meristem, differential expressed gene, photoperiod, hormone, sucrose