Plant Systematics and Evolution

, Volume 199, Issue 3–4, pp 193–202 | Cite as

Isozyme variation inBulnesia retama, B. schickendantzii andB. foliosa (Zygophyllaceae)

  • Cecilia I. Comas
  • Juan H. Hunziker
Article

Abstract

The genetic variation between two allopatric populations ofBulnesia retama and that ofB. schickendantzii andB. foliosa was investigated. The Peruvian population ofB. retama showed low values of P (0.117) and He (0.057) compared to those in the Argentine population with P = 0.59 and He = 0.269;B. schickendantzii showed P = 0.54 andB. foliosa P = 0.17. Genetic identity between the latter was 0.836 and between the allopatric populations ofB. retama was 0.89; the Peruvian population had reduced allelic variation per locus (A = 1.176) in comparison to the Argentine population (A = 1.955). The values of A, P, He andWright's fixation indices suggest that the Peruvian population could have originated from a single or very few migrants from southern latitudes (founder effect).

Key words

Zygophyllaceae Bulnesia retama B. schickendantzii B. foliosa Isozyme variation long distance dispersal founder effect 

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Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • Cecilia I. Comas
    • 1
  • Juan H. Hunziker
    • 2
    • 3
  1. 1.Departamento de Ciencias BiológicasFacultad de Ciencias Exactas y NaturalesBuenos AiresArgentina
  2. 2.Instituto de Botánica DarwinionSan Isidro, Prov. de Buenos AiresArgentina
  3. 3.Departamento de Ciencias BiológicasFacultad de Ciencias Exactas y NaturalesBuenos AiresArgentina

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