芭蕉芋的花粉活力和柱头的可授性研究

为探讨芭蕉芋杂交育种的可能性，采用TTC染色法和联苯胺一过氧化氢法对贵州种植的3个品种（材料）的花粉活力和柱头可授性进行了研究，结果表明：芭蕉芋花粉活力普遍低于其他作物，在离体条件下，36h后，基本没有活力，寿命较短，影响了芭蕉芋种子结实率；柱头可授性随时间的变化而变化，从当日19：00到次日10：30均呈上升趋势，随后开始下降，次日4：30～10：30是柱头可授性最强的时间，只要选择合适的时期辅以人工授粉，则可达到提高芭蕉芋授粉受精目的，从而进行新品种选育及改良。

Study on Pollen Viability and Stigma Receptivity of Canna edulis

In order to explore the possibility of hybrid breeding for Canna edulis, the author studied the pollen viability and stigma receptivity of three Canna edulis varieties planted in Guizhou by the methods of TC staining and benzidine - H202. The re suits showed that the pollen viability of Canna edulis was generally lower than that of other crops. Under the isolated condition for o- ver 36 hours, the pollen of Canna edulis was basically of no viability, and its short lifetime affected the seed setting rate. The stigma receptivity changed with time history, it showed a rising trend from 19：00 on that day to 10：30 on the next day, and then began to decline. From 4：30 to 10：30 on the next day, the stigma receptivity was the strongest. As a result, as long as we choice the right time and supplement artificial pollination, the objective of enhancing the fertilized rate of Canna edulis will be attained, and the breedinz and imorovement of new varieties will be realized successfully.