*Department of Botany, University of Leicester, Leicester LEI 7RH. Fax 44 533 522791.
Native oak chloroplasts reveal an ancient divide across Europe
Article first published online: 14 APR 2008
Volume 2, Issue 6, pages 337–343, December 1993
How to Cite
FERRIS, C., OLIVER, R. P., DAVY, A. J. and HEWITT, G. M. (1993), Native oak chloroplasts reveal an ancient divide across Europe. Molecular Ecology, 2: 337–343. doi: 10.1111/j.1365-294X.1993.tb00026.x
During the study period, Colin Ferris was a postdoctoral researcher funded by NERC but has now moved to an academic post at Leicester University. The work is a result of the collaboration between population geneticists, molecular biologists and plant ecologists in the Population Biology Sector at UEA, aiming to study the postglacial history of key species using molecular techniques. The project forms part of a continuing study of the geographical subdivision of species, particularly in Europe, including two grasshopper species, trees and toads.
- Issue published online: 14 APR 2008
- Article first published online: 14 APR 2008
- Received 22 April 1993; accepted 30 June 1993
- chloroplast DNA (cpDNA);
- DNA sequencing;
- glacial refugia;
- postglacial migr̈ation;
- Quercus spp.;
- tRNALeu1 intron
Glacial refugia and postglacial migration are major factors responsible for the present patterns of genetic variation we see in natural populations. Traditionally postglacial history has been inferred from fossil data, but new molecular techniques permit historical information to be gleaned from present populations. The chloroplast tRNALeu1 intron contains regions which have been highly conserved over a billion years of chloroplast evolution. Surprisingly, in one of these regions which has remained invariant for all photosynthetic organisms so far studied, we have found intraspecific site polymorphism. This polymorphism occurs in two European oaks, Quercus robur and Q. petraea, indicating hybridisation and introgression between them. Two distinct chloroplast types occur and are distributed geographically as eastern and western forms suggesting that these oaks are each derived from at least two separate glacial refugia.