極早生水稲の分げつ体系からみた高位分げつの発生機構

日本作物学会紀事

松葉 捷也¹ 

[1] 農業技術研究機構

关键词: Oryza sativa L.;    イネ;    Morphogenesis;    形態形成;    Upper nodal tiller;    高位分げつ;    Extremely early variety;    極早生品種;    Main shoot;    主稈;    Developmental anatomy;    発育解剖;    Tiller;    分げつ;    Rice plant;    葉数;   

DOI  :  10.1626/jcs.72.62

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The total number of leaves on the main stem was 9 in Norin 11, and 10 in Norin 9 and Norin 15 under normal-season culture. The last primary tillers developed from the 8th node of the main stems in the three varieties. However, the system of tillering was ordinary and many upper nodal tillers appeared in the three varieties. The lowest nodal position developing the primary upper nodal tillers was judged to be the node where a protuberance of tiller primordium or a young bud having 1 to 2 leaf primordia were observed at the panicle-neck-node differentiation stage (referred to as PND) of the main shoot. This nodal position was 7th, 6th and 5th node in Norin 9, Norin 15 and Norin 11, respectively. The last upper nodal tillers had 3 or 4 leaves. The reason for this system was considered as follows : After PND of the main shoot, the protuberance of the primary tiller primordia can reach its PND only after the main shoot developed additional 2.5 leaves. On the other hand, the result of the developmental anatomy showed that, during the above-mentioned development of the main shoot, tiller primordia developed propyll and 2 or 3 leaf primordia. These observations explain well, the presence of 3 or 4 leaves on the last upper nodal tillers.

【 授权许可】

Unknown