水稲における登熟性の品種間差に関する研究

日本作物学会紀事

劉 建¹  塩津 文隆¹  楠谷 彰人²  豊田 正範² 

[1] 愛媛大学大学院連合農学研究科;香川大学農学部

关键词: Carbohydrate;    炭水化物;    Paddy rice;    水稲;    Percentage of ripened grains;    登熟歩合;    Ripening ability;    登熟性;    Translocation;    転流;    Varietal difference;    品種間差;    Vascular bundle;    維管束;   

DOI  :  10.1626/jcs.76.262

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The influence of the size of vascular bundle and carbohydrate translocation on the ripening ability of rice were investigated with high-yielding varieties bred in Asian countries and Japanese varieties. The percentages of ripened grains in whole panicle (R), on primary rachis-branch (R1) and on secondary rachis-branch (R2) were lower in high-yielding varieties. The relations among the amount of carbohydrates increased during the period from heading to maturing per paddy (ΔC/N), that of carbohydrates in stem during the same period per paddy (T/N), and the percentage of ripened grains, were analyzed. T/N in high-yielding varieties showed a significant positive correlation with R, R1 and R2, and also with the total area of large vascular bundles per paddy (Vb/N). These significant correlations, however, were not observed in Japanese varieties. Moreover, multiple regression analysis on the percentage of ripened grains indicated that Vb/N strongly contributed to R2 in high-yielding varieties. These results showed that cultivars with a larger Vb/N have a higher T/N. Such cultivars may have a higher R mainly due to the increased R2. However, it was suggested that the size of vascular bundle did not directly affect the ripening ability in Japanese varieties because other factors also influenced the translocation of carbohydrate.

【 授权许可】

Unknown