Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

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

Publication Information

View PDF (830 KB bytes)

Title: Allozyme differentiation and biosystematics of the Californian closed-cone pines (Pinus subsect. Oocarpae)

Author: Millar, Constance I.; Strauss, Steven H.; Conkle, M. Thompson; Westfall, Robert D.;

Date: 1988

Source: Systematic Botany 13(3):351-370

Publication Series: Miscellaneous Publication

Description: Allozyme differentiation at 32 loci was studied in the three Californian species of Pinus subsect. Oocarpae: P. attenuata, P. muricata, and P. radiata, and in a small sample of a Latin American species of the subsection, P. oocarpa. The Californian species were previously known to comprise highly differentiated, disjunct populations, but with uncertain phylogenetic relationships among several populations and species. All populations had clear affinities for single species. The controversial Channel Islands (Santa Cruz Island) population of P. muricata and the Mexican Island (Guadalupe and Cedros islands) populations of P. radiata were distinct within their respective species, but clearly fell within each species complex. Con- to evidence from other traits, the Californian species were equally differentiated from one another allozymically, with no evidence of close relationships among pairwise comparisons of the three species. Pinus oocorpa, the putative ancestral species, was about two times more variable, and at substantial and approximately equal genetic distance from each of the three Californian species. Divergence of populations within species was generally clinal. The initial radiation of P. attenuata was in the Sierra Nevada, and subsequent divergence was toward the coast in the Siskiyou Mountains, and then south through the coast range to southern California. Divergence in both P. muricata and P. radiata occurred northward along the coast, with the southern island populations retaining ancestral alleles, and differentiation from P. oocarpa increasing northward within species. Genetic differentiation among species was twice that among populations within species.

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.

XML: View XML

Citation:


Millar, Constance I.; Strauss, Steven H.; Conkle, M. Thompson; Westfall, Robert D. 1988. Allozyme differentiation and biosystematics of the Californian closed-cone pines (Pinus subsect. Oocarpae). Systematic Botany 13(3):351-370

 


 [ 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.