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

• Genetic & Breeding?Germplasm Resources?Molecular Biology • Previous Articles     Next Articles

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 Online:2025-06-20 Published:2025-06-20
  • Contact: JIAN Hongju, and Lü Dianqiu

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