摘要
本文通过小叶满江红（Ａｚｏｌｌａｍｉｃｒｏｐｈｙｌｌａ）×蕨状满江红（Ａｚｏｌｌａｆｉｌｉｃｕｌｏｉｄｅｓ）（Ｂ×Ａ）、墨西哥满江红（Ａｚｏｌｌａｍｅｘｉｃａｎａ）、蕨状满江红（Ｍ×Ａ）种间正反交杂种一代五个主要性状的遗传分析，揭示种间杂种Ｆ１代若干重要的遗传特点，为杂种苗的鉴定提供植物形态学及生殖生物学方面的依据。这五个性状是：１．叶色；２．叶表皮毛；３．泡胶块上钩毛；４．孢子育性；５．茎的分枝方式和植株形态。五个性状除Ｂ×Ａ和Ｍ×Ａ两组合杂种正常环境下的叶色和茎的分枝方式相同于父母本外，其余四个性状均区别于父母本。此外，本文在讨论部分对杂种小孢子败育原因以及小孢子育性对三膘亚属红萍生物种的划分意义作了初步分析。
By using genetic analysis to 5 main morphological characters of frist filial generation from posititively or negatively crossed combinations of Azolla microphylla × A. filiculoides(B×A)and A. mexicana × A. filiculoides (M × A). some of important hereditary features Of F1 gen-eration from interspecific hybridization in Euazolla were revealled, and it provided a basis Of plant morphology and reproductive biology for the identification to hybrid seedlings.These 5 characters include: leaf colour; tricomes on dorsal lobes; glochidia of massulae: sporocarp fertility: and stem bifurcation and plant morphology. Except that the leaf colour and bifurcation of B × A and M × A combinations are as same as parent plants, other four hereditary features are different from the parents. In addition。 some abortion mechanism of microsporocarp from hybrid progenies and the effect of its fertility on Euazolla taxonomy were preliminarily analysed。
