開花期前の低温処理がダイズの自然交雑率に及ぼす影響

日本作物学会紀事

島村 聡¹  羽鹿 牧太¹  高溝 正²  飯村 敬二²  石本 政男³ 

[1] 作物研究所;畜産草地研究所;北海道農業研究センター

关键词: Flowering stage;    開花期;    Low temperature;    低温;    Natural out-crossing;    自然交雑;    Pollen dispersal;    花粉飛散;    Soybean;    ダイズ;    Sterility;    不稔;   

DOI  :  10.1626/jcs.79.316

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Generally soybean is a crop with a very high autogamy rate, but the allogamy rate may increase when the low temperature before the flowering stage induces abnormal pollen formation. In this study, we examined the effects of a low temperature before the flowering stage on the natural out-crossing rate. The cotyledons of soybean cv. Aomarukun are green, but those of the F1 obtained by crossing with cultivars with yellow cotyledons are yellow. Therefore, this was used for judgment of crossing. The plants of Aomarukun were grown in a growth chamber at 8-15°C for 7 days before the flowering stage, and then they were placed adjacent to the pollen parent under field conditions and the out-crossing rate was investigated. As a result, the out-crossing rate was 0-0.18% in the control plants and 0.1-0.62% in the low temperature-treated plants, indicating that the low temperature before the flowering stage enhances the rate considerably. In addition, the effect of the setting of beehives of honey bee, which is one of the pollinators, was examined. The crossing rate was higher in the plot with beehives(0.21%)than in the plot without beehives(0.07%). Thus, it was confirmed that a low temperature before the flowering stage is a factor increasing the natural out-crossing rate.

【 授权许可】

Unknown