Study of genes related to increased leaf area and regeneration ability in sorghum

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K06009
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 39020:Crop production science-related
• Research Institution: National Agriculture and Food Research Organization
• Principal Investigator: Kawahigashi Hiroyuki 国立研究開発法人農業・食品産業技術総合研究機構, 果樹品種育成研究領域 果樹茶育種基盤グループ, 主席研究員 (80373249)
• Co-Investigator(Kenkyū-buntansha): 春日 重光 信州大学, 学術研究院農学系, 教授 (50345758)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: ソルガム / 再生性 / 収量性増大 / バイオマス / 飼料作物 / C4作物

Outline of Final Research Achievements

To increase the yield per unit area of sorghum (Sorghum bicolor (L.) Moench), we studied a gene region that increases the leaf area (qLL10) and that increases postharvest regeneration capacity (qRG10) on chromosome 10. A detailed gene mapping was performed using recombinant lines derived from a cross of sorghum and sudangrass progeny, which allowed us to narrow the range of candidate gene regions to 0.25M and 1.2M, respectively.
Gene expression of qRG10 region in regenerating shoots after seedling transection revealed several genes that exhibit gene expression patterns correlated with regenerative ability within the candidate regions.

Free Research Field

農業遺伝学

Academic Significance and Societal Importance of the Research Achievements

ソルガム(Sorghum bicolor (L.) Moench)は、アフリカ原産のC4作物であり、夏期に旺盛な生育を示します。種子が食料使用のほか、草体は牛飼育用の飼料として重要な作物です。現在の耕地面積をそのままに単位面積の収穫量を飛躍的にしかも安価に上げることができれば、食料及びバイオマス資源の安定的供給が可能になるほか、二酸化炭素の固定化にも貢献することが期待されます。