Kade Research Ltd.
Abstract
Influence of day length on the growth of stem, flowering, the morphology of flower clusters and seed set in buckwheat
Hiroyasu Michiyama1, Keiji Tsuchimoto1, Ken-ichirio TaniSup>1, Tatsuya Hirano1, Hisayoshi Hayashi2 and Clayton Campbell3
Hiroyasu Michiyama, Keiji Tsuchimoto, Ken-ichirio Tani, Tatsuya Hirano, Hisayoshi Hayashi and Clayton Campbell. 2004. Influence of Day Length on the Growth of Stem, Flowering, the Morphology of Flower Clusters and Seed set in Buckwheat. Advances in Buckwheat Research, Ninth International Symposium on Buckwheat, Prague, Czech Republic. pp. 35-40
Abstract: The purpose of this study was to demonstrate the changes to main stem growth, flowering, morphology of flower clusters and seed set as affected by day length and to clarify the difference between the cultivars and the growth parameters. For this study we used Shinanonatsusoba (summer eco-type) and Miyazakizairai (autumn eco-type) and BLO 1000 ( a long cluster line which usually develops DM clusters in Kade Research Ltd., Canada). A long day period influenced main stem growth, flowering, and seed set as was found in previous studies. Furthermore, it was shown that a long day period increased the frequency of DM clusters, the length of flower clusters and the number of sub-flower clusters per cluster in Shinanonatsusoba and Miyazakizairai as well as in BLO 1000. It is confirmed that the effects of day-length period varied among the growth parameters and that there were three types of responses to day length. The varietal difference between summer and autumn eco-type cultivars was elucidated, and was shown to be involved in the responses to day length in flour groups of parameters; the main stem elongation; the first flowering node and the first flowering day; the elevating rate of flowering cluster position; and the number of seeds and seed set ratio.
Key words: buckwheat, day length, eco-type, flower cluster, flowering, growth, seed set
