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Folia Geobotanica

, Volume 31, Issue 3, pp 333–344 | Cite as

Mating systems in two species ofPotentilla from Alaska

  • Bente Eriksen
Apomixis and Taxonomy Proceedings of the Symposium held in Pruhonice, Czech Republic 1995; edited by A.J. Richards, J. Kirschner, J. Stepanek & K. Marhold

Abstract

Aspects of reproductive ecology have been studied in two species ofPotentilla (Rosaceae) from interior Alaska. Data were collected to determine mating system traits such as seed: ovule and pollen: ovule ratios, and experiments were carried out in the field in order to study the effect of caging, emasculation, and manual self-pollination on seed set and seed quality. Mating system strategies differ between the two species in the populations examined. High pollen: ovule ratio, high seed: ovule ratio, good autodeposition ability, and unpredictable pollination in concert with self-incompatibility indicate thatP. hookeriana in the population studied has adopted a more or less pseudogamous mating system. In contrast, the data suggest thatP. uniflora in the studied population is approaching a sexual, facultatively outbreeding species. Because both species exhibit ploidy variation, a trait common among agamospermous plants, it is concluded that both species are likely to be facultatively agamospermous but that sexual reproduction is much more important in the population ofP. uniflora than it is inP. hookeriana.

Keywords

Apomixis Pollen: ovule ratio Reproductive ecology Rosaceae Seed: ovule ratio 

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References

  1. Acharya Goswami D. &Matfield B. (1974): Pseudogamy in the genusPotentilla L.New Phytol. 73: 1243–1247.CrossRefGoogle Scholar
  2. Asker S. (1977): Pseudogamy, hybridization and evolution inPotentilla.Hereditas 87: 179–184.CrossRefGoogle Scholar
  3. Barrett S. C. H. (1988): The evolution, maintenance, and loss of self-incompatibility systems. In:Lovett Doust J. &Lovett Doust L. (eds.),Plant reproductive ecology, Oxford University Press, New York, pp. 98–124.Google Scholar
  4. Campbell C.S. &Dickinson T.A. (1990): Apomixis, patterns of morphological variation, and species concepts in subfam.Maloideae (Rosaceae).Syst. Bot. 15: 124–135.CrossRefGoogle Scholar
  5. Cideciyan M.A. &Malloch A.J.C. (1982): Effects of seed size on the germination, growth and competitive ability ofRumex crispus andRumex obtusifolius.J. Ecol. 70: 227–232.CrossRefGoogle Scholar
  6. Cruden R.W. (1977): Pollen-ovule ratios: a conservative indicator of breeding systems in flowering plants.Evolution 31: 32–45.CrossRefGoogle Scholar
  7. Dickinson T.A. &Phipps J.B. (1986): Studies inCrataegus (Rosaceae: Maloideae) XIV. The breeding system ofCrataegus crus-galli sensu lato in Ontario.Amer. J. Bot. 73: 116–130.CrossRefGoogle Scholar
  8. Goldblatt P. (1981): Index to plant chromosome numbers 1975–1978.Monogr. Syst. Bot. Missouri Bot. Gard. 5: 440–442.Google Scholar
  9. Goldblatt P. (1988): Index to plant chromosome numbers 1979–1986.Monogr. Syst. Bot. Missouri Bot. Gard. 23: 194–195.Google Scholar
  10. Goldblatt P. &Johnson D.E. (1990): Index to plant chromosome numbers 1987–1989.Monogr. Syst. Bot. Missouri Bot. Gard. 30: 168–169.Google Scholar
  11. Haskell G. (1960): Role of the male parent in crosses involving apomicticRubus species.Heredity 14: 101–113.Google Scholar
  12. Hendrix S.D. (1984): Variation in seed weight and its effects on germination inPastinaca sativa L. (Umbelliferae).Amer. J. Bot. 71: 795–802.CrossRefGoogle Scholar
  13. Hultén E. (1968):Flora of Alaska and neighboring territories. Stanford University Press, Stanford.Google Scholar
  14. Ietswaart J.H. &Kliphuis E. (1985): Hybrids between DutchTormentillae (Potentilla, Rosaceae).Acta Bot. Neerl. 34: 157–170.Google Scholar
  15. Juzepczuk S. (1941): Rod 739. Lapĉatka—Potentilla. In:Komarov V. (ed.),Flora SSSR 10 (Flora of the U.S.S.R. 10), Moskva, Leningrad, pp. 78–223.Google Scholar
  16. Kellogg E.A. (1990): Variation and species limits in agamospermous grasses.Syst. Bot. 15: 112–123.CrossRefGoogle Scholar
  17. Löve Á. &Löve D. (1948):Chromosome numbers of northern plant species. Ingólfsprent, Reykjavík.Google Scholar
  18. Molau U., Carlsson M., Dahlberg A. &Hill Ö. (1989): Mating system and pollen-mediated gene flow inBartsia alpina.Oikos 55: 409–419.CrossRefGoogle Scholar
  19. Molau U. (1993): Relationships between flowering phenology and life history strategies in tundra plants.Arct. Alpine Res. 25: 391–402.CrossRefGoogle Scholar
  20. Morgan D.R., Soltis D.E. &Robertson K.R. (1994): Systematic and evolutionary implications of rbcL sequence variation inRosaceae.Amer. J. Bot. 81: 890–903.CrossRefGoogle Scholar
  21. Muniyamma M. &Phipps J.B. (1979a): Cytological proof of apomixis inCrataegus (Rosaceae).Amer. J. Bot. 66: 149–155.CrossRefGoogle Scholar
  22. Muniyamma M. &Phipps J.B. (1979b): Meiosis and polyploidy in Ontario species ofCrataegus in relation to their systematics.Canad. J. Genet. Cytol. 21: 231–241.Google Scholar
  23. Müntzing A. (1928): Pseudogamie der GattungPotentilla.Hereditas 11: 267–283.Google Scholar
  24. Müntzing A. (1931): Note on the cytology of some apomicticPotentilla-species.Hereditas 15 166–178.CrossRefGoogle Scholar
  25. Ramirez N. &Brito Y. (1990): Reproductive biology of a tropical palm swamp community in the Venezuelan Llanos.Amer. J. Bot. 77: 1260–1271.CrossRefGoogle Scholar
  26. Skalińska M. &Czapik R. (1958): Studies in the cytology of the genusPotentilla L.Acta Biol. Cracov., Ser. Bot. 1: 137–149.Google Scholar
  27. Smith G.L. (1963a): Studies inPotentilla. I. Embryological investigations into the mechanism of agamospermy in BritishP. tabernaemontaniAschers.New Phytol. 62: 264–282.CrossRefGoogle Scholar
  28. Smith G.L. (1963b): Studies inPotentilla: II. Cytological aspects of apomixis inP. crantzii(Cr.) Beck exFritsch.New Phytol. 62: 283–300.CrossRefGoogle Scholar
  29. Soják J. (1985): Some new northern hybrids inPotentilla L.Preslia 57: 263–266.Google Scholar
  30. Soják J. (1986): Notes onPotentilla. I. Hybridogenous species derived from intersectional hybrids of sect.Niveae×sect.Multifidae. Bot. Jahrb. Syst. 106: 145–210.Google Scholar
  31. Sokal R.R. &Rohlf F.J. (1987):Introduction to biostatistics. Ed. 2. W.H. Freeman & Company, New York.Google Scholar
  32. Svensson L. (1985): An estimate of pollen carryover by ants in a natural population ofScleranthus perennis L. (Caryophyllaceae).Oecologia 66: 373–377.CrossRefGoogle Scholar
  33. Temme D.H. (1986): Seed size variability: a consequence of variable genetic quality among offspring?.Evolution 40: 414–417.CrossRefGoogle Scholar
  34. Wiens D. (1984): Ovule survivorship, brood size, life history, breeding systems, and reproductive success in plants.Oecologia 64: 47–53.CrossRefGoogle Scholar
  35. Wolf T. (1908): Monographie der GattungPotentilla.Biblioth. Bot. 16: 1–714.Google Scholar

Copyright information

© Institute of Botany 1996

Authors and Affiliations

  • Bente Eriksen
    • 1
  1. 1.University of Alaska MuseumFairbanksU.S.A.

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