山口県での早播栽培がコムギ品種の幼穂形成における小花分化パターンに及ぼす影響

日本作物学会紀事

張 立¹  松澤 智彦¹  高橋 肇¹  藤本 香奈¹  山口 真司¹ 

[1] 山口大学農学部

关键词: Winter habit;    秋播性;    Spikelet number per spike;    一穂小穂数;    Wheat;    コムギ;    Floret differentiation;    小花分化;    Terminal spikelet stage;    頂端小穂分化期;    Double-ridge stage;    二重隆起期;    Early sowing;    早播栽培;    Spike formation;    幼穂形成;   

DOI  :  10.1626/jcs.77.467

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Pattern of floret differentiation at each spikelet position of developing spikes of nine wheat cultivars was investigated in three successive growing seasons, from 1999 to 2002 in Yamaguchi. The results obtained by early sowing were compared with those obtained by standard sowing. These cultivars had different degrees of winter habit and were raised in different districts. This experiment was done to determine the change in spikelet number caused by early sowing in these cultivars. The florets differentiated earlier at the center than at the base or tip of the developing spike in standard sowing in all cultivars. In early sowing, they also differentiated earlier at the center of the spikelet in spring habit and strong winter habit cultivars. On the other hand Iwainodaichi and Airakomugi, the mild winter habit cultivars bred in Kyushu and Kanto districts differentiated florets earlier at the tip than at the center or base of spikelets in early sowing. The spikelet numbers per spike were larger in early sowing than in standard sowing in Iwainodaichi and Airakomugi in all three seasons, while they were smaller in early sowing than in standard sowing. Nevertheless, in Iwainodaichi and Airakomugi, the kernel number was smaller at the tip than at the center of the spikelet in early sowing, even though the florets differentiated earlier at the tip than at the center of the spikelets.

【 授权许可】

Unknown