Theoretical and Applied Genetics

, Volume 78, Issue 6, pp 809–817 | Cite as

Allozyme diversity in wild Phaseolus vulgaris: further evidence for two major centers of genetic diversity

  • R. Koenig
  • P. Gepts
Article

Summary

Allozyme analysis was performed on 83 wild Phaseolus vulgaris accessions, representing a wide geographical distribution from Mesoamerica to Argentina, to determine levels of genetic diversity and geographic patterns of variability at nine polymorphic isozyme loci. The collection can be divided into two major groups, one consisting of accessions from Mexico, Central America, Colombia and Peru, and the other consisting of accessions from Peru and Argentina. One accession from northern Peru is distinct from the two major groups, and may delineate a transition zone between the two divergent groups. The level of genetic diversity within wild P. vulgaris (Ht=0.132) is comparable with those found in other Phaseolus species. There was no significant within-accession gene diversity (Hs=0.006); however, there is a moderate level of genetic diversity (Dst=0.126) between accessions. Our results are consistent with previous studies on the genetic diversity of wild P. vulgaris using phaseolin, the major seed storage protein of beans.

Key words

Crop evolution Domestication Molecular markers Common bean 

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Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • R. Koenig
    • 1
  • P. Gepts
    • 1
  1. 1.Department of Agronomy and Range ScienceUniversity of CaliforniaDavisUSA

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