PAG-IX: COMPARATIVE QTL MAPPING IN PROGENY OF INTER-VARIETAL HYBRIDS OF DOUGLAS-FIR

PAG-IX   Plant & Animal Genome IX Conference

Town & Country Hotel, San Diego, CA, January 13-17, 2001.

Workshop: Forest Tree Genome Mapping
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COMPARATIVE QTL MAPPING IN PROGENY OF INTER-VARIETAL HYBRIDS OF DOUGLAS-FIR

KONSTANTIN V. KRUTOVSKII1, Frank C. Sorensen2, W. Thomas Adams1, Steven H. Strauss1,

1 Department of Forest Science, Oregon State University, Corvallis, Oregon 97331-7501, USA
2 USDA Forest Service, Corvallis, Oregon 97331-7501, USA

We present genome linkage maps and QTL analyses for two hybrids between the coastal and interior varieties of Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco]. The varieties differ markedly in several adaptive traits, including cold hardiness, rate of growth, and shoot phenology. More than one-thousand offspring were genotyped at more than 130 RAPD loci and phenotypes determined for 61 quantitative traits. Most QTL had a minor but statistically significant effect, although several major QTLs responsible for more than 8-10% of phenotypic variance were detected for traits such as cold hardiness, biomass, height, and branching. About 30% of all segregating loci were common between the two hybrids, allowing a comparison of the distribution of QTLs among parents.

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