イネいもち病真性抵抗性マルチラインを構成する同質遺伝子系統の混合割合が収量に与える影響

日本作物学会紀事

金田 智¹  石崎 和彦¹  松井 崇晃¹ 

[1] 新潟県農業総合研究所作物研究センター

关键词: Blast resistance;    いもち病真性抵抗性;    Isogenic line;    同質遺伝子系統;    Mixing ratio;    混合割合;    Multiline variety;    多系品種;    Oryza sativa L;    イネ;   

DOI  :  10.1626/jcs.75.507

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Yielding ability of multiline composed of the blast resistant isogenic lines (Pia, Pii, Pita-2 and Piz) and original line (+) was evaluated in a paddy field with severe blast epidemic (a pathogenic race 137). When 25 % of the original line was replaced by each isogenic line, the grain yield and percentage of yield decrease were greatly affected by the presence of Pita-2 and Piz. The yield was greatly influenced by the mixing ratio of the resistant lines. The multiline composed of the four true resistant isogenic lines was the best to maintain a high yielding ability, and had a grain yield of 411.7 g m-2 with a 10.6 % yield decrease compared with the resistant line alone. On the other hand, the grain yield of the original line was 259.1 g m-2 with a 43.7 % yield decrease. Thus, the advantage of the multiline was estimated to be a 152.6 g m-2 yield increase and 33.1 % improvement of yield decrease.

【 授权许可】

Unknown