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Finding Stable QTL for Plant Height in Super Hybrid Rice

Author

Listed:
  • Huali Yang

    (State Key Laboratory of Rice Biology and Chinese National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 311401, China)

  • Qinqin Yang

    (State Key Laboratory of Rice Biology and Chinese National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 311401, China)

  • Yiwei Kang

    (State Key Laboratory of Rice Biology and Chinese National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 311401, China)

  • Miao Zhang

    (State Key Laboratory of Rice Biology and Chinese National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 311401, China)

  • Xiaodeng Zhan

    (State Key Laboratory of Rice Biology and Chinese National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 311401, China)

  • Liyong Cao

    (State Key Laboratory of Rice Biology and Chinese National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 311401, China
    Northern Center of China National Rice Research Institute, Jiamusi 155100, China)

  • Shihua Cheng

    (State Key Laboratory of Rice Biology and Chinese National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 311401, China)

  • Weixun Wu

    (State Key Laboratory of Rice Biology and Chinese National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 311401, China)

  • Yingxin Zhang

    (State Key Laboratory of Rice Biology and Chinese National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 311401, China)

Abstract

Plant height (PH) is one of the most important agronomic traits determining plant architecture in rice. To investigate the genetic basis of plant height in the high-yielding hybrid rice variety Nei2You No.6, recombinant inbred sister lines (RISLs) were used to map quantitative trait loci (QTL) over four years. A total of 19 minor/medium-effect QTLs were mapped on eleven chromosomes except chromosome 10, totally explaining 44.61–51.15% phenotypic variance in four environments. Among these, qPH-1a , qPH-1b , qPH-2b , qPH-3b , qPH-6 , and qPH-7b were repeatedly detected over four years. Among these, the qPH-6 was mapped to an interval of 22.11–29.41 Mb on chromosome 6L, which showed the highest phenotypic variation explained (PVE) of 10.22–14.05% and additive effect of 3.45–4.63. Subsequently, evaluation of near isogenic lines (NILs) showed that the qPH-6 allele from the restorer line (R8006) could positively regulate plant height, resulting in an 18.50% increase in grain yield. These results offered a basis for further mapping of qPH-6 and molecular breeding in improving plant architecture in rice.

Suggested Citation

  • Huali Yang & Qinqin Yang & Yiwei Kang & Miao Zhang & Xiaodeng Zhan & Liyong Cao & Shihua Cheng & Weixun Wu & Yingxin Zhang, 2022. "Finding Stable QTL for Plant Height in Super Hybrid Rice," Agriculture, MDPI, vol. 12(2), pages 1-10, January.
    • Handle: RePEc:gam:jagris:v:12:y:2022:i:2:p:165-:d:732422
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    References listed on IDEAS

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    2. A. Sasaki & M. Ashikari & M. Ueguchi-Tanaka & H. Itoh & A. Nishimura & D. Swapan & K. Ishiyama & T. Saito & M. Kobayashi & G. S. Khush & H. Kitano & M. Matsuoka, 2002. "A mutant gibberellin-synthesis gene in rice," Nature, Nature, vol. 416(6882), pages 701-702, April.
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    1. Hongmei Chen & Yongyi Fan & Dian Li & Zhihao Sun & Zheyan Ruan & Huali Yang & Yiwei Kang & Weixun Wu & Qunen Liu & Xiaodeng Zhan & Liyong Cao & Ming Zhou & Shihua Cheng & Yingxin Zhang, 2023. "Genetic Dissection of Tiller Number qTN4 in Rice," Agriculture, MDPI, vol. 13(2), pages 1-14, February.

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