穂の握り締めによるイネ品種の脱粒性評価において調査株数の削減が評価結果に及ぼす影響

日本作物学会紀事

大久保 和男¹ 

[1] 岡山県農林水産総合センター農業研究所

关键词: Evaluation method;    評価方法;    Japanese cultivar;    日本品種;    Rice (Oryza sativa L);    イネ;    Number of plants for investigation;    調査株数;    Threshability;    脱粒性;   

DOI  :  10.1626/jcs.82.283

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

This study was aimed at examining the effects of reduction in the number of plants used for evaluation of the threshability of rice cultivars and its reproducibility. The four evaluators tested 50 plants, and grasped one, three or five panicles each time, using seven cultivars, three with hard, two with middle, one with easy, and one with very easy threshability. The effects of the number of plants used for investigation on the heritability of the shedding rate, which was estimated from the variance components of the two-way (cultivars and evaluators) analysis of variance, were analyzed 20 times by random sampling and the calculation of heritability on each condition. Heritability was reduced with decreasing the number of plants for investigation. The heritability was higher when the evaluator grasped three panicles than one or five panicles, and a very high heritability value was maintained even when the number of plants was reduced to 25 by grasping three panicles. Under this condition, it was possible to classify threshability into four grades, i.e., hard, middle, easy and very easy grade, but it was difficult to distinguish between very hard and semi-hard and also between semi-easy and easy threshability.

【 授权许可】

Unknown