Two types of partial fertility in a diploid population of the fern Thelypteris decursive-pinnata (Thelypteridaceae)

@article{Nakato2011TwoTO,
  title={Two types of partial fertility in a diploid population of the fern Thelypteris decursive-pinnata (Thelypteridaceae)},
  author={Narumi Nakato and Ryo Ootsuki and Noriaki Murakami and Shigeo Masuyama},
  journal={Journal of Plant Research},
  year={2011},
  volume={125},
  pages={465-474}
}
Two types of abnormal sporophytes were observed in a population of diploid Thelypteris decursive-pinnata. Most sporophytes in this population exhibited regular chromosome pairing, resulting in the formation of 30 bivalents in meiosis I; however, they produced abortive spores to various degrees. Some formed large globose spores at low frequencies, most likely to be unreduced diplospores. The other type of abnormal sporophyte underwent synaptic failure to form 60 univalents at meiosis I, but… 
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