Analysis of unidirectional hybridization between supra-annual flowering species, Strobilanthes glandulifera, and annual flowering species, S.tashiroi

在冲绳岛茂羽半岛，从生态学、形态学和遗传学等方面对田代马蓝、曲茎马蓝及其杂种的现状进行了观察和研究。分类学上，毛乌素半岛的S.tashiroi和S.flexicaulis分别被确认为多年生多结果性和单结果性，周期性大量开花的种。F_1、F_2、F_3、F_4、F_5、F_6、F_7、F_8、F_9、F_10、F_11、F_12、F_13、F_14、F_15、F_16、F_17、F_18、F_19、F_1由于在非盛花期传粉者很少，推测杂交只发生在盛花期，S. flexicaulis是压倒性的，因此在任何水平的杂交中，S.flexicaulis都是主要的花粉供体。隔离尚未建立至少之间的杂交种和S.flexicaulis。

In the Motobu Peninsula of Okinawa Island, the present situation of Strobilanthes tashiroi, S.flexicaulis and their putative hybrids are observed and examined ecologically, morphologically and genetically. Ecologically, S.tashiroi and S.flexicaulis in the Motobu Peninsula are confirmed to be polycarpic perennial and monocarpic and periodical mass-flowering species, respectively. The putative hybrids, including F1, F2…and following back-cross generations are also confirmed to derive from hybridization between S.tashiroi and S.flexicaulis with the latter species as major pollen donor. As the pollinators were scarcely found in non-mass-flowering years, it is deduced that hybridization occurs only in the mass-flowering years when the flowers of S. flexicaulis are overwhelming so that the S.flexicaulis acts as major pollen donor in any level of hybridization. Isolation has not been established at least between the hybrids and S.flexicaulis.