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Plant Systematics and Evolution

, Volume 194, Issue 1–2, pp 39–54 | Cite as

Intra- and interspecific genetic differentiation in closely related pines fromPinus subsectionSylvestres (Pinaceae) in the former Soviet Union

  • Grigori G. Goncharenko
  • Arkadi E. Silin
  • Vladimir E. Padutov
Article

Abstract

Thirty-seven natural populations of four closely related species ofPinus subsect.Sylvestres, P. mugo, P. funebris, P. pallasiana, andP. sylvestris, occurring in the former Soviet Union were investigated by starch-gel electrophoresis. In the populations assayed 127 allelic variants at 25 loci were revealed.Nei's distance coefficient (Dn) was used to estimate the level of genetic differentiation amongP. sylvestris races and among closely related species. A dendrogram constructed using Dn values shows that of the fiveP. sylvestris races analyzed only the geographically isolated var.hamata exhibited sufficient differences at theDia-2 locus (a mean Dn value relative to the other four races is 0.025) to recognize it as a distinct taxon. The remaining races, “sylvestris”, “cretacea”, “lapponica”, and “sibirica”, have a similar gene pool (Dn values are not greater than 0.010), and they should be regarded as a single taxon,P. sylvestris var.sylvestris. Interspecific comparisons revealed thatP. sylvestris andP. mugo have the closest genetic affinities to each other withNei's genetic distance of 0.108. The dendrogram demonstrates thatP. funebris is closer toP. sylvestris andP. mugo thanP. pallasiana. The available paleontologic data allowed us to conclude thatNei's (1975) time scale estimate for the time of divergence of the taxa was more accurate thanNei's (1971) time scale estimate.

Key words

Gymnosperms Pinaceae Pinus subsect.Sylvestres Isozymes genetic distance time of divergence 

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Copyright information

© Springer-Verlag 1995

Authors and Affiliations

  • Grigori G. Goncharenko
    • 1
  • Arkadi E. Silin
    • 1
  • Vladimir E. Padutov
    • 1
  1. 1.Department of Molecular Genetics and Forest Tree BreedingInstitute of Forestry of the Academy of Sciences of BelarusGomelBelarus

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