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 Jeon, Gynheung An and Hong Gil Nam ()
Additional contact information
Dongjin Shin: National Institute of Crop Science (NICS), RDA
Sichul Lee: Institute for Basic Science (IBS)
Tae-Heon Kim: National Institute of Crop Science (NICS), RDA
Jong-Hee Lee: National Institute of Crop Science (NICS), RDA
Joonheum Park: Institute for Basic Science (IBS)
Jinwon Lee: Institute for Basic Science (IBS)
Ji Yoon Lee: National Institute of Crop Science (NICS), RDA
Lae-Hyeon Cho: Kyung Hee University
Jae Young Choi: New York University
Wonhee Lee: DGIST
Ji-Hwan Park: Institute for Basic Science (IBS)
Dae-Woo Lee: Kyung Hee University
Hisashi Ito: Hokkaido University
Dae Heon Kim: Sunchon National University
Ayumi Tanaka: Hokkaido University
Jun-Hyeon Cho: National Institute of Crop Science (NICS), RDA
You-Chun Song: National Institute of Crop Science (NICS), RDA
Daehee Hwang: Institute for Basic Science (IBS)
Michael D. Purugganan: New York University
Jong-Seong Jeon: Kyung Hee University
Gynheung An: Kyung Hee University
Hong Gil Nam: Institute for Basic Science (IBS)

Nature Communications, 2020, vol. 11, issue 1, 1-11

Abstract: 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.

Date: 2020
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DOI: 10.1038/s41467-020-16573-2

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