Electrophoretic variation of the apogamousDryopteris varia group (Dryopteridaceae) |
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| Authors: | Su-Juan Lin Masahiro Kato Kunio Iwatsuki |
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| Affiliation: | (1) Botanical Gardens, Faculty of Science, University of Tokyo, 112 Tokyo, Japan;(2) Present address: Department of Biological Sciences, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113 Tokyo;(3) Present address: Department of Chemistry, Faculty of Science, Rikkyo University, 3-34-1 Nishi-ikebukuro, 171 Toshimaku, Tokyo |
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| Abstract: | A total of 35 electrophoretic variants were detected in four apogamous species of theDryopteris varia group: 14 variants inD. bissetiana triploids, 7 inD. sacrosancta triploids, 6 inD. varia triploids, 3 inD. pacifica triploids, and 5 in apogamous diploids. The variants differed from each other in various combinations of a few alleles which were common in some of the variants, suggesting recurrent origin.Dryopteris insularis var.insularis (2x) and var.chichisimensis (3x), other members of the group, were electrophoretically monomorphic, suggesting single origin. Banding patterns infer that triploids ofD. bissetiana andD. sacrosancta may have originated from hybrids whose parent is the sexualD. saxifraga, whereas this species was not involved in the origin of the other apogamous triploids and the apogamous diploids. The other parent was also discussed and we proposed a hypothesis that diploid offsprings fromD. pacifica triploids hybridized withD. saxifraga giving rise to triploids ofD. bissetiana andD. sacrosancta. |
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| Keywords: | Apogamous species Dryopteris varia Electrophoresis Hybrid Ploidy reduction Polyploid |
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