Plant Systematics and Evolution

, Volume 127, Issue 2–3, pp 139–170 | Cite as

Genetic variation inLycopersicon pimpinellifolium: Evidence of evolutionary change in mating systems

  • Charles M. Rick
  • Jon F. Fobes
  • Miguel Holle


L. pimpinellifolium is a highly heterogeneous species, exhibiting pronounced trends from one end of its linear distribution to the other in nearly every studied genetic locus. Drastic differences between populations were also detected in genetic variability and rates of outcrossing. Highly significant positive correlations exist in every possible comparison between flower size, degree of stigma exsertion, heterozygosity, and allelic polymorphism. The hypothesis most compatible with observations proposes that the very uniform, highly self-pollinated biotypes originated from the more primitive, more variable, facultatively allogamous forms.

Key words

Lycopersicon pimpinellifolium Solanaceae Allozymes clinal variation electrophoresis evolution of mating systems heterozygote advantage isozymes 


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Copyright information

© Springer-Verlag 1977

Authors and Affiliations

  • Charles M. Rick
    • 1
  • Jon F. Fobes
    • 1
  • Miguel Holle
    • 2
  1. 1.Department of Vegetable CropsUniversity of CaliforniaDavisUSA
  2. 2.Departamento de HorticulturaUniversidad Nacional AgrariaLimaPerú

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