Multi-Year QTL Mapping and RNA-seq Reveal Candidate Genes for Early Floret-Opening Time in Japonica Rice

Xiaozhou Hu, Guoliang Chen, Rui Zhang, Mengxuan Xu, Ling Zhao, Hailong Tang, Jinlong Ni and Ming Zhou ()
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Xiaozhou Hu: State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
Guoliang Chen: China National Seed Group Co., Ltd., Beijing 100031, China
Rui Zhang: State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
Mengxuan Xu: State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
Ling Zhao: Institute of Food Crops, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
Hailong Tang: China National Seed Group Co., Ltd., Beijing 100031, China
Jinlong Ni: Rice Research Institute, Anhui Academy of Agricultural Sciences, Hefei 230031, China
Ming Zhou: State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China

Agriculture, 2023, vol. 13, issue 4, 1-12

Abstract: Floret-opening time (FOT) refers to the time between florets opening and closing within a day, and is a crucial agricultural trait for reproductive development, thermal tolerance and hybrid breeding in rice. However, little is known about the genetic basis and genes controlling FOT in rice. Here, we report the genetic mapping and transcriptome analysis of FOT in the japonica rice cultivar G23. Combining the QTLseqr and GradedPool-seq (GPS) methods, we located a major quantitative trait locus (QTL), qFOT6 , on chromosome 6 in multiple years and under different environments. Integrating RNA-seq analysis, we selected 13 potential candidate genes in the qFOT6 interval that might be associated with FOT in G23. Taken together, our work uncovers a major QTL and potential candidate genes for FOT in rice, thus providing invaluable clues for rice breeding.

Keywords: floret-opening time; quantitative trait locus; transcriptome; rice breeding (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
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