Hori Kiyotaka, Murakami Noriaki
The Kochi Prefectural Makino Botanical Garden 4200-6 Godaisan, Kochi 781-8125, Japan The Kochi Prefectural Makino Botanical Garden Kochi Japan.
Makino Herbarium, Tokyo Metropolitan University, 1-1 Minami-osawa, Hachioji, Tokyo 192-0397, Japan Tokyo Metropolitan University Hachioji Japan.
PhytoKeys. 2019 Jun 18;124:57-76. doi: 10.3897/phytokeys.124.35242. eCollection 2019.
We analyzed the phylogeny of the complex using plastid and low-copy nuclear marker DNA sequences. Based on allele constitution, triploid apogamous species of the complex appeared to have originated from the hybridization of triploid apogamous species and diploid sexual species by recurrent hybridization events. These results suggested that triploid apogamous ferns can achieve hybridization with diploid sexual species by producing diploid spores with irregular meiosis in sporogenesis. Furthermore, the present study predicted the involvement of several unknown species associated with hybridization. More sampling of species from China and adjacent areas is required to determine the relationships among unknown species and the complex.
我们使用质体和低拷贝核标记DNA序列分析了该复合体的系统发育。基于等位基因构成，该复合体的三倍体无融合生殖物种似乎是通过反复杂交事件，由三倍体无融合生殖物种与二倍体有性生殖物种杂交产生的。这些结果表明，三倍体无融合生殖蕨类植物在孢子发生过程中通过产生减数分裂不规则的二倍体孢子，能够与二倍体有性生殖物种实现杂交。此外，本研究预测了与杂交相关的几个未知物种的参与情况。需要从中国及周边地区采集更多的物种样本，以确定未知物种与该复合体之间的关系。
