Relationship between Date of Anthesis and Grain Weight on the Panicle of Rice

Japanese Journal of Crop Science

Tomomi NAKAMOTO¹  Akio MATSUZAKI¹  Hiroyasu MACHIDA¹ 

关键词: Date of anthetis;    イネ;    Grain weight;    穎花;    Rice;    開花;    Spikelet(s);    粒重;   

DOI  :  10.1626/jcs.57.627

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The relationship between the difference of date of anthesis (Δt) and that of final grain weight (Δw)was studied by observing pairs of spikelets at various positions on the panicle of rice cultivers, 'Nipponbare' and 'Musashikogane'. A high negative correlation was found between the deviation of Δt (Δt-Δtmode ; Δtmode was the most frequently observed Δt) and that of Δw (Δw-Δwmode ; Δwmode is the Δw when Δt = Δtmode), in all pairs of spikelets both on the same (Fig.2) and on different (Fig.3) primary rachis branches. Thus, the results suggest that early flowering spikelets bear larger grains than later flowering spikelets on the corresponding position of primary rachis branch. This fact is probably because early flowering augments nutritional distribution.

【 授权许可】

Unknown