Skip to page content
USDA Forest Service

Research & Development Treesearch

Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help - We Participate  Government Made Easy

Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (1.5 MB bytes)

Title: Electrophoretic Analysis of Diversity and Phylogeny of Pinus brutia and Closely Related Taxa

Author: Conkle, M. T.; Schiller, G.; Grunwald, C.;

Date: 1988

Source: Systematic Botany 13(3): p. 411-424

Publication Series: Miscellaneous Publication

Description: Rangewide samples from mature natural stands of Pinus brutia Ten. subsp. brutia, subsp. stankewiczii (Sukaczew) Nahal, subsp. pithyusa (Stevenson) Nahal, and subsp. eldarica (Medw.) Nahal from throughout the eastern Mediterranean display a continuum of allozyme variation for 30 loci. Ten geographic samples of subsp. brutia from Greek islands of the eastern Aegean Sea, and from Turkey, Cyprus, and Iraq have a mean expected heterozygosity of 0.12 (range from 0.10 to 0.14) and similar allelic variation suggesting that they share a common gene pool with minor geographic differentiation. Subspecies stankewiczii, a narrow endemic of the Crimea, has expected heterozygosity equal to the mean for subsp. brutia populations; subsp. eldarica has the lowest expected heterozygosity (0.08) among these closely related pines. Pines of the P. brutia group are polymorphic for many loci that are monomorphic and are presumed fixed in a widespread parapatric close relative, P. halepensis Mill. Consequently, they have nearly three times more variation than P. halepensis. Of all the subspecies sampled, stankewiczii has allozyme traits most like those expected in a progenitor of the entire P. brutia-P. halepensis complex. Its allele frequencies resemble subsp. brutia and it has a moderate frequency for an allele that is fixed in P. halepensis but which is sparse or lacking in other samples of the P. brutia group. Subspecies pithyusa's allele frequencies resemble those of subsp. stankewiczii and several subsp. brutia populations. Subspecies eldarica's allozyme similarities to the easternmost subsp. brutia populations and reduced diversity provide evidence of its derivation from subsp. brutia. Allele frequencies of Quetta pine (a provenance from a P. brutia-like naturalized race in southwestern Asia) closely match those of subsp. eldarica and provide evidence of its derivation from subsp. eldarica. Genetic distances between P. brutia and P. halepensis average 0.35 for Nei's unbiased distance and 0.47 for Cavalli-Sforza and Edwards's chord distance. Allozyme characteristics support the hypothesis that P. halepensis was derived from progenitors similar to pines of the extant P. brutia group mainly by fixation of alleles that are still polymorphic in pines of the group.

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.



Conkle, M. T.; Schiller, G.; Grunwald, C. 1988. Electrophoretic Analysis of Diversity and Phylogeny of Pinus brutia and Closely Related Taxa. Systematic Botany 13(3): p. 411-424


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.