Natural variations at the Stay-Green gene promoter control lifespan and yield in rice cultivars

Dongjin Shin, Sichul Lee, Tae Heon Kim, Jong Hee Lee, Joonheum Park, Jinwon Lee, Ji Yoon Lee, Lae Hyeon Cho, Jae Young Choi, Wonhee Lee, Ji Hwan Park, Dae Woo Lee, Hisashi Ito, Dae Heon Kim, Ayumi Tanaka, Jun Hyeon Cho, You Chun Song, Daehee Hwang, Michael D. Purugganan, Jong Seong JeonGynheung An, Hong Gil Nam

Research output: Contribution to journalArticle

Abstract

Increased grain yield will be critical to meet the growing demand for food, and could be achieved by delaying crop senescence. Here, via quantitative trait locus (QTL) mapping, we uncover the genetic basis underlying distinct life cycles and senescence patterns of two rice subspecies, indica and japonica. Promoter variations in the Stay-Green (OsSGR) gene encoding the chlorophyll-degrading Mg++-dechelatase were found to trigger higher and earlier induction of OsSGR in indica, which accelerated senescence of indica rice cultivars. The indica-type promoter is present in a progenitor subspecies O. nivara and thus was acquired early during the evolution of rapid cycling trait in rice subspecies. Japonica OsSGR alleles introgressed into indica-type cultivars in Korean rice fields lead to delayed senescence, with increased grain yield and enhanced photosynthetic competence. Taken together, these data establish that naturally occurring OsSGR promoter and related lifespan variations can be exploited in breeding programs to augment rice yield.

Original languageEnglish (US)
Article number2819
JournalNature communications
Volume11
Issue number1
DOIs
StatePublished - Dec 1 2020

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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    Shin, D., Lee, S., Kim, T. H., Lee, J. H., Park, J., Lee, J., Lee, J. Y., Cho, L. H., Choi, J. Y., Lee, W., Park, J. H., Lee, D. W., Ito, H., Kim, D. H., Tanaka, A., Cho, J. H., Song, Y. C., Hwang, D., Purugganan, M. D., ... Nam, H. G. (2020). Natural variations at the Stay-Green gene promoter control lifespan and yield in rice cultivars. Nature communications, 11(1), [2819]. https://doi.org/10.1038/s41467-020-16573-2