滇龙胆开花物候与交配系统研究

通过对滇龙胆的开花物候与交配系统进行观测,统计不同处理的结实率和结籽率,分析滇龙胆开花物候与交配系统等繁育特征.结果表明:滇龙胆花期在10月中旬至12月中旬,单花花期持续17～19 d,单个花序花期可持续33～37 d,单株水平花期可持续8周,群体水平开花期持续时间为60 d以上,具有雌雄异位和雌雄异熟特征.滇龙胆杂交...

Flowering Phenology and Mating System of Gentiana rigescens

Through the observation of the flowering phenology and mating system of Gentiana rigescens, the seed setting rate and seed setting rate of different treatments were counted. The influence of flowering phenology and mating system on breeding was analyzed. The results showed that the florescence was from mid- October to the end of November, the florescence of inflorescence lasted for 33~37 days, the florescence of single flower lasted for 17~19 days, the florescence of single plant lasted for 8 weeks, and the florescence of population lasted for more than 60 days. The pollen was most active within 2~3 days of opening, and the stigma was inactive. The stamens developed completely and the pistils continued to grow after opening. The outcrossing index (OCI) was 5, which belonging to the heterozygous type. Some of them were self-compatible and pollination needed. The pollen ovule ratio (P/O) was between 582.8±441.2 and 1405.8±550.8. The breeding system belonged to the facultative heterozygous type. The seed setting rate was higher in the natural state, and there was asexual propagation. The seed setting rate could be significantly increased by artificial pollination.