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U.S. Department of Agriculture USDA Forest Service Southern Regional Extension Forestry Southern Regional Extension Forestry

Association genetics of pitch canker resistance in loblolly pine

Association genetics has been used for dissection of complex traits in species with large, outcrossing populations with high genetic diversity and low linkage disequilibrium. It relies on historical recombinations to identify statistical associations between phenotypic traits and genetic marker polymorphism. Association studies were performed on loblolly pine for resistance to pitch canker, an economically important disease that affects many pine species and is caused by the necrotrophic fungus Fusarium circinatum. Disease phenotyping was performed on 498 largely unrelated genotypes in a randomized incomplete block design with four resolvable replicates of each genotype.

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Author(s): John M. Davis

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 2009