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

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Abstract
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.