Three species groups in American trilliums as revealed by compatibility with an Asian species |
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| Authors: | Tutomu Haga Robert B Channell |
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| Institution: | (1) Department of Biology, Kyushu University, 812 Fukuoka;(2) Department of General Biology, Vanderbilt University, 37235 Nashville, Tennessee, USA |
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| Abstract: | American trilliums are all diploid and are classified into three groups with regard to compatibility withTrillium kamtschaticum, a single diploid Asian species: (1) Compatible pedicellate-flowered species, i.e.T. erectum, T. gleasoni, andT. vaseyi. (2) Incompatible pedicellate-flowered species, i.e.T. grandiflorum. (3) Incompatible sessile-flowered species, i.e.T. decunbens, T. luteum, T. sessile andT. stamineum. HybridsT. kamtschaticum×T. erectum flowered for the first time 9–10 years after sowing F1 seeds. The F1 were completely sterile in pollen and in seed-setting. |
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| Keywords: | American trilliums Compatibility F1 hybrid Species groups |
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