Theoretical and Applied Genetics

, Volume 78, Issue 4, pp 480–488

Variation in outcrossing rate and population genetic structure of Clarkia tembloriensis (Onagraceae)

  • T. P. Holtsford
  • N. C. Ellstrand

DOI: 10.1007/BF00290831

Cite this article as:
Holtsford, T.P. & Ellstrand, N.C. Theoret. Appl. Genetics (1989) 78: 480. doi:10.1007/BF00290831


Outcrossing rate estimates for eight accessions of Clarkia tembloriensis indicate that this annual plant species has a wide interpopulational range of outcrossing rate (\(\hat t = {\text{0}}{\text{.03}} - {\text{0}}{\text{.87}}\)). Populations' t estimates were significantly correlated with observed heterozygosity and mean number of alleles per locus. Estimated fixation indices, \(\hat f\), for most populations were very close to their expected values, Feq, for a given \(\hat t\) Nei's gene diversity statistics showed that the group of outcrossing populations have more total genetic variation and less differentiation among populations than does the group of selfing populations. These results indicate that the breeding system of C. tembloriensis has had a strong influence on the amount and distribution of genetic variation within and among its populations.

Key words

Outcrossing rate Population structure Inbreeding coefficients Gene diversity Isozymes 

Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • T. P. Holtsford
    • 1
  • N. C. Ellstrand
    • 1
  1. 1.Department of Botany and Plant SciencesUniversity of CaliforniaRiversideUSA
  2. 2.W. K. Kellogg Biological StationMichigan State UniversityUSA

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