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| Web URL(s): | http://www.nrcresearchpress.com/doi/pdf/10.1139/b01-036
Last checked: 09/30/2015
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Gillespie, Lynn J.;
Boles, Ruben |
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| Author Affiliation: | Research Division, Canadian Museum of Nature, Ottawa, ON, Canada |
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| Title: | Phylogenetic relationships and infraspecific variation in Canadian Arctic Poa based on chloroplast DNA restriction site data |
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| Source: | Canadian Journal of Botany. Vol. 79, No. 6, June 2001, p. 679-701. |
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| Publishing Information: | Vancouver, British Columbia: The National Research Council of Canada. |
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| # of Pages: | 23 |
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| Related Web URL: | http://www.nrcresearchpress.com/doi/abs/10.1139/b01-036
Last checked: 09/30/2015
Notes: English abstract only |
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| Keywords: | TIC Keywords: Phylogeny; Relationships; Poa; Chloroplasts; DNA; Polymerase chain reaction; Poa pratensis; Geographical distribution; Poa alpina; Poa arctica; Classification; Taxonomy
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| Geographic Terms: | Canadian Arctic |
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| Abstract/Contents: | "Infraspecific variation and phylogenetic relationships of Canadian Arctic species of genus Poa were studied based on chloroplast DNA (cpDNA) variation. Restriction site analysis of polymerase chain reaction amplified cpDNA was used to reexamine the status of infraspecific taxa, reconstruct phylogenetic relationships, and reexamine previous classification systems and hypotheses of relationships. Infraspecific variation was detected in three species, but only in Poa hartzii Gand. did it correspond to infraspecific taxa where recognition of subspecies ammophilia at the species level is supported. Additional variation in P. hartzii ssp. hartzii is hypothesized to be the result of hybridization with Poa glauca in the High Arctic and subsequent introgression resulting in repeated transfer of P. glauca DNA. The variation in Poa pratensis L. had a geographical rather than taxonomic basis, and is hypothesized to correspond to indigenous arctic versus introduced extra-arctic populations. In P. glauca Vahl cpDNA variation was detected only in western Low Arctic and boreal populations and may represent greater variation where the species survived the Pleistocene glaciations. Cladistic parsimony analysis of cpDNA restriction site data mostly confirms recent infrageneric classification systems. Poa alpina L., along with the non-arctic Poa annua L. and Poa sect. Sylvestres, formed the basalmost clades. The remaining taxa group into two main clades: one consisting of Poa sects. Poa, Homalopoa, Madropoa and Diocopoa; the second, of Poa sects. Secundae, Pandemos, Abbreviatae and Stenopoa. Poa sect. Poa, comprising Poa arctica R. Br. and P. pratensis, is a strongly supported monophyletic group, not closely related to P. alpina. Poa hartzii is confirmed as a member of a paraphyletic or weakly supported P sect. Secundae. Poa glauca and Poa abbreviata R. Br. are distict members within a generally unresolved Poa. sect. Stenopoa-Abbreviatae complex" |
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| Language: | English |
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| References: | 64 |
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| Note: | Abstract also appears in French
Figures
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Gillespie, L. J., and R. Boles. 2001. Phylogenetic relationships and infraspecific variation in Canadian Arctic Poa based on chloroplast DNA restriction site data. Can. J. Bot. 79(6):p. 679-701. |
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| Web URL(s):
http://www.nrcresearchpress.com/doi/pdf/10.1139/b01-036
Last checked: 09/30/2015
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: QK 1 .C3 |
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