The genetic structure of the gynodioecious Kallstroemia grandiflora (Zygophyllaceae): the role of male sterility and colonization history: The role of male sterility and colonization history

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In gynodioecious populations, the frequency of females is expected to have a strong influence on the contemporary genetic structure of populations. Historical patterns of range contraction and expansion are also known to influence the genetic diversity of plant populations. We explore the influence of male sterility and colonization history on the genetic diversity in populations of Kallstroemia grandiflora along the Pacific of México. Both the overall population Fis and Fis values of hermaphrodites showed a negative association with female frequency. Genetic diversity declined with latitude. Our results provide evidence that females have a significant effect on the genetic structure as predicted by theoretical models and provide support for the hypothesis that historical processes have modified the genetic structure of K. grandiflora.

Original languageSpanish (Mexico)
Pages (from-to)269-274
Number of pages6
Issue number4
StatePublished - 31 May 2006

Bibliographical note

Funding Information:
We thank Luis Eguiarte and Raúl Alcalá for critical comments on previous versions of the manuscript, Gumersindo Sánchez and José Martínez for Lab and Field assistance and CONACYT (34889-V) for financial support and a scholarship to EC.


  • Genetic structure
  • Gynodioecy
  • Kallstroemia
  • Male sterility
  • Sonoran desert

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