白米アミロース含有率の推定による白濁が少ない 低アミロース米生産のための栽培適地・適作期の推定法

日本作物学会紀事

長田 健二¹  白土 宏之⁴  今川 彰教²  神田 英司⁴  安藤 正⁷  山口 弘道⁴  八島 由美⁶  福田 あかり⁴  和泉 佳³  三上 雄史⁸  浅野 真澄⁶  吉永 悟志⁵  福嶌 陽⁴ 

[1] 近畿中国四国農業研究センター;山形県最上総合支庁;宮城県栗原農業改良普及センター;東北農業研究センター;作物研究所;宮城県古川農業試験場;山形県農業総合研究センター水田農業試験場;宮城県登米農業改良普及センター

关键词: Amylose content;    白米アミロース含有率;    Direct seeding;    直播栽培;    Dull endosperm;    玄米の白濁;    DVR;    Low-amylose rice;    低アミロース米;    Rice;    水稲;    作期;   

DOI  :  10.1626/jcs.81.281

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

A method for estimating the suitable time and area for transplanting or direct-seeding rice to avoid the incidence of marked dull endosperm was investigated by predicting the amylose content of low-amylose rice varieties using a model for estimating developmental stages. Three low-amylose rice varieties were transplanted or direct-seeded at three locations in the Tohoku region of Japan three times a year for three years. A high negative correlation was found between the temperature during the ripening period and the amylose content of milled grains. Marked dull endosperms were observed in the grains containing less than 10% amylose. The amylose content with respect to transplanting or direct seeding date was estimated using a model for estimating heading dates and a regression model explaining the relationship between the temperature during the ripening period and the amylose content. The root mean square error quantified by the difference between the predicted values of amylose content by this method and the measured values was 0.88-1.67%. It was possible to estimate the suitable time for transplanting or direct-seeding to avoid marked dull endosperm by estimating the dates on which the amylose content was predicted to be 10-15%. Furthermore, the results estimated by this method suggested that the suitable area and time of cultivation to avoid marked dull endosperm could be expanded by an appropriate combination of transplanting and direct seeding.

【 授权许可】

Unknown