Theoretical and Applied Genetics

, Volume 69, Issue 4, pp 393–398

The impact of domestication on distribution of allozyme variation within and among cultivars of radish,Raphanus sativus L.

  • N. C. Ellstrand
  • D. L. Marshall
Originals

DOI: 10.1007/BF00570908

Cite this article as:
Ellstrand, N.C. & Marshall, D.L. Theoret. Appl. Genetics (1985) 69: 393. doi:10.1007/BF00570908

Summary

Allozyme surveys of cultivated plant species generally report little within-cultivar variation, but considerable among-cultivar variation. This trend contrasts with natural plant populations in which most allozyme variation resides within, rather than among, populations. The difference may be an artifact of the extreme inbreeding techniques used to develop and propagate these crops, rather than a consequence of domestication per se. To test this hypothesis, we compared the population genetic structure of 24 lines of radish cultivars — a domesticated species developed and maintained as open-pollinated, outcrossed populations — with four wild radish populations in California. Although the wild populations displayed more overall allozyme variation than the cultivars, most of the allozyme variation in the cultivars remains partitioned within, rather than among, lines. Apparently, how a crop is developed and maintained can have a profound influence on the organization of genetic variation of that species.

Key words

Breeding methodsIsozymesPolymorphismRadishRaphanus sativus

Copyright information

© Springer-Verlag 1985

Authors and Affiliations

  • N. C. Ellstrand
    • 1
  • D. L. Marshall
    • 1
  1. 1.Department of Botany and Plant SciencesUniversity of CaliforniaRiversideUSA