Mitochondrial DNA products among RAPD profiles are frequent and strongly differentiated between races of Douglas-fir


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Racial differentiation and genetic variability were studied between and within the coastal, north interior, and south interior races of Douglas-fir using RAPD and allozyme markers. Nearly half of all RAPD bands scored (13:45%) were found to be amplified from mitochondrial DNA. They exhibited maternal inheritance among hybrids and back-crosses between the races, and were much more highly differentiated (GST= 0.62 for haplotype frequencies) than were allozymes (GST= 0.26). No evidence of hybridization or introgression was detected where the coastal and interior races come into proximity in central Oregon.