Materials for the study of high-mountain dwarf bluegrass Poa attenuata Trin. s.l., section Stenopoa Dumort.
The results of a population-morphological study of the Tibetan race Poa attenuata Trin. s.l. are presented. Studies of the variability of the main qualitative discriminator characteristics (the surface of rachilla, the surface of the lemma callus, the surface of the lemma between the veins) on the Tibet territory allowed us to establish only general trends in the distribution and predominance of one or another character state. All three characters, including the surface of the lemma callus, showed variability both within the races and within populations. This calls into question the appropriateness the species status for Poa dahurica Trin. In general, the characters showed quite high variability. The data revealed the morphological diversity of taxa on Tibet territory, but do not answer the question posed as to whether the Siberian and Tibetan races belong to the same species, or whether deep evolutionary changes occurred during their separate existence, allowing them to be considered as different species. To resolve this issue, a more detailed study using molecular genetic methods and ecological niche comparison are required.
Keywords
population variability,
Tibet,
Poa L.,
Stenopoa Dumort.Authors
| Olonova Marina V. | Tomsk State University | olonova@list.ru |
Всего: 1
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