水稲の湛水土中直播栽培における土中出芽性の新たな検定方法と土中出芽性の新たな遺伝資源

日本作物学会紀事

吉田 智彦²  太田 久稔¹  上原 泰樹¹  井辺 時雄¹ 

[1] 農業技術研究機構;宇都宮大学

关键词: Gene source;    遺伝資源;    Evaluating method;    検定方法;    Rice;    水稲;    Direct seeding;    ç›´æ’­;    Tape seeder;    テープシーダー;    Seedling emergence;    submerged soil condition;    土中出芽;   

DOI  :  10.1626/jcs.72.295

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

We previously reported a method of screening seed with a high seedling emergence rate in which seeds were sown 20 mm deep from the soil surface at 25°C in a growth chamber. In this paper, we propose a new method of evaluating seedling emergence under field conditions. In the field test, seeds held on seeder-tape were placed at a 20 mm depth from the soil surface with a tape seeder. As a preliminary test, 23 representative rice cultivars from various origins were tested for the rate of seedling emergence. The results showed a positive correlation between the percentage of seedling emergence in the growth chamber test that in the field test. To confirm this correlation, we repeated the test using 103 rice cultivars in total among them, 47 cultivars were from Russia, and 50 from Nepal. The results showed a significant correlation between the values obtained in the growth chamber and the field test. We found a new gene source with the highest percentage of seedling emergence “Ta Hung Ku” from China. Next, the seedling emergence of 347 F3 lines of Dontokoi/Ta Hung Ku were tested. It was difficult to select the lines with a high emergence rate in a growth chamber. However, it was confirmed that several lines had a higher percentage of seedling emergence than Ta Hung Ku in the field test.

【 授权许可】

Unknown