, Volume 53, Issue 2, pp 255–257 | Cite as

Male reproductive effort and breeding system in an hermaphroditic plant

  • Daniel J. Schoen


Male reproductive effort was estimated from flower, seed and fruit biomass data in populations of the self-compatible plant Gilia achilleifolia that differ in genetically estimated selfing rate. Male reproductive effort decreases with increased rate of selfing, a finding that is consistent with theoretical arguments pertaining to the allocation of resources to male and female reproductive functions in hermaphroditic organisms.


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  1. Brown AHD, Allard RW (1970) Estimation of the mating system in open-pollinated maize populations using isozyme polymorphisms. Genetics 66:133–145Google Scholar
  2. Brown AHD, Matheson AC, Eldridge KG (1975) Estimation of the mating system of Eucalyptus obliqua L'Herit by using allozyme polymorphisms. Aust J Bot 23:931–949Google Scholar
  3. Charlesworth B, Charlesworth D (1978a) A model for the evolution of dioecy and gynodioecy. Amer Natur 112:975–997Google Scholar
  4. Charlesworth D, Charlesworth B (1978b) Population genetics of male sterility and the evolution of monecy and dioecy. Heredity 41:137–153Google Scholar
  5. Charlesworth D, Charlesworth B (1981) Allocation of resources to male and female function in hermaphrodites. Bot J Linn Soc 15:57–74Google Scholar
  6. Charnov EL (1979) Simultaneous hermaphroditism and sexual selection. Natl Acad Sci USA Proc 76:2480–2484Google Scholar
  7. Charnov EL, Maynard Smith J, Bull JJ (1976) Why be an hermaphrodite? Nature 263:125–126Google Scholar
  8. Cruden RW (1977) Follen-ovule ratios: a conservative index of breeding system in flowering plants. Evolution 31:32–46Google Scholar
  9. Darwin C (1877) The Different Forms of Flowers on Plants of the Same Species. Murray, LondonGoogle Scholar
  10. Fischer EA (1981) Sexual allocation in a simultaneously hermaphroditic coral reef fish. Amer Natur 117:64–82Google Scholar
  11. Gadgil M, Bossert WH (1970) Life historical consequences of natural selection. Amer Natur 104:1–24Google Scholar
  12. Heath DJ (1977) Simultaneous hermaphroditism; cost and benefit. Jour theoret Biol 64:363–373Google Scholar
  13. Lloyd DG (1972) Breeding systems in Cotula L. (Compositae, Anthemideae). New Phytol 71:1181–1194Google Scholar
  14. Lloyd DG (1980a) Parental strategies in angiosperms. New Zealand J Bot 17:595–606Google Scholar
  15. Lloyd DG (1980b) Benefits and handicaps of sexual reproduction. Evol Biol 13:69–110Google Scholar
  16. Lovett Doust J, Harper JL (1980) The resource costs of gender and maternal support in an andromonoecious umbellifer, Smyrnium olusatrum L. New Phytol 85:251–264Google Scholar
  17. Maynard Smith J (1971) The origin and maintenance of sex. In: Group Selection, GC Williams (ed), Aldine, ChicagoGoogle Scholar
  18. Maynard Smith J (1978) The Evolution of Sex. Cambridge Univ Press, CambridgeGoogle Scholar
  19. Schoen DJ (1982) The breeding system of Gilia achilleifolia: variation in floral characteristics and outcrossing rate. Evolution (in press)Google Scholar
  20. Smith CA, Evenson WE (1978) Energy distribution in reproductive structures of Amaryllis. Amer J Bot 65:714–716Google Scholar
  21. Solbrig OT (1976) On the relative advantages of cross- and self-fertilization. Ann Missouri Bot Gard 63:262–276Google Scholar
  22. Vernet P, Harper JL (1980) The cost of sex in seaweeds. Biol J Linn Soc 13:129–138Google Scholar
  23. Williams GC (1975) Sex and Evolution. Princeton Univ Press, PrincetonGoogle Scholar

Copyright information

© Springer-Verlag 1982

Authors and Affiliations

  • Daniel J. Schoen
    • 1
  1. 1.Department of BotanyUniversity of CaliforniaBerkeleyUSA

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