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


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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