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Study on Phenotypes and Agronomical utility of a Rice GT1 (grassy tillers 1, OsGT1) Homologue

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  • URLhttps://db.koreascholar.com/Article/Detail/302905
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한국육종학회 (The Korean Breeding Society)
초록

Enhancing yield has been a major challenge of agriculture. In rice, tiller number is one of the important biomass and yield components. A maize mutant grassy tillers1 (gt1) increases lateral branches in maize. The GT1 gene encodes a class I homeodomain leucine zipper (HD-Zip) protein. In maize, the gt1 expression is induced by shading and is dependent on the activity of teosinte branched1 (tb1), a major domestication locus controlling tillering and lateral branching. To estimate the biological role and agricultural utility of gt1 in rice, rice homologue (OsGT1) has been isolated and its overexpressors and RNAi lines were generated. Field data showed that OsGT1 overexpressors reduced tillers and panicles while RNAi lines increased them, compared to wild type. Shade signal is an important factor in determining lateral branching. To understand the relationship between OsGT1 and shade avoidance, plants have been grown under 50% shading in the field. Also, double genetic combinations with phytochrome mutants (phyA, B, and C) are being examining for tillering phenotype. These ongoing researches will provide insights in determining the action of OsGT1 on branching and shade avoidance in rice.

저자
  • Vikranth Kumar(Division of Applied Life Science, Plant Molecular Biology & Biotechnology Research Center (PMBBRC), Gyeongsang National University)
  • Yuan Hu Xuan(Division of Applied Life Science, Plant Molecular Biology & Biotechnology Research Center (PMBBRC), Gyeongsang National University)
  • Byoung Il Je(Division of Applied Life Science, Plant Molecular Biology & Biotechnology Research Center (PMBBRC), Gyeongsang National University)
  • Soon Ju Park(Division of Applied Life Science, Plant Molecular Biology & Biotechnology Research Center (PMBBRC), Gyeongsang National University)
  • Jin Huang(Division of Applied Life Science, Plant Molecular Biology & Biotechnology Research Center (PMBBRC), Gyeongsang National University)
  • Jing Miao Liu(Division of Applied Life Science, Plant Molecular Biology & Biotechnology Research Center (PMBBRC), Gyeongsang National University)
  • Ryza A. Priatama(Division of Applied Life Science, Plant Molecular Biology & Biotechnology Research Center (PMBBRC), Gyeongsang National University)
  • Vimal Raj K(Division of Applied Life Science, Plant Molecular Biology & Biotechnology Research Center (PMBBRC), Gyeongsang National University)
  • Sung Hoon Kim(Division of Applied Life Science, Plant Molecular Biology & Biotechnology Research Center (PMBBRC), Gyeongsang National University)
  • Jin-hee Jeong(Division of Applied Life Science, Plant Molecular Biology & Biotechnology Research Center (PMBBRC), Gyeongsang National University)
  • Chang-deok Han(Division of Applied Life Science, Plant Molecular Biology & Biotechnology Research Center (PMBBRC), Gyeongsang National University)