水稲品種オオチカラ由来の短根性準同質遺伝子系統IL-srt1の収量性

日本作物学会紀事

趙 仁貴²  劉 建¹  塩津 文隆¹  楠谷 彰人³  豊田 正範³  諸隈 正裕³ 

[1] 愛媛大学大学院連合農学研究科;吉林農業大学農学院;香川大学農学部

关键词: 収量;    Yield component;    収量構成要素;    Near isogenic line;    準同質遺伝子系統;    Rice;    水稲;    Short-root gene;    短根性遺伝子;    Percentage of ripened grains;    登熟歩合;    Percentage of fertilized grains;    稔実歩合;   

DOI  :  10.1626/jcs.77.461

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The effect of a short root characteristic of rice plant on yield was investigated by comparing the yield and yield components of cultivar Oochikara with those of IL-srt1, a short root near isogenic line derived from Oochikara. The percentage of the yield in IL-srt1 (507g/m2) to that in Oochikara (745g/m2) was 68%. The percentage of ear number, number of grains per head, percentage of ripened grains and 1000 grain weight in IL-srt1 were 91%, 100%, 80%, 95% of those in Oochikara, respectively. Low yield ability of IL-srt1 was mainly attributed to a low percentage of ripened grains. The percentage of fertilized grains and that of fully ripened grains, which are components of the percentage of ripened grains in IL-srt1 were 74% and 108% of those in Oochikara, respectively. Although the percentage of fertilized grains in IL-srt1 was lower than that in Oochikara, the percentage of fully ripened grains to fertilized grains in IL-srt1 was higher than that in Oochikara. These results imply that the low yield ability of IL-srt1 is attributed to the effect of the short-root gene of IL-srt1, which reduces the percentage of ripened grains by decreasing the percentage of fertilized grains.

【 授权许可】

Unknown