Discovery of cryptic Armillaria solidipes genotypes within the Colorado Plateau

Abstract

Armillaria solidipes (= A. ostoyae) is a root-disease pathogen that causes severe losses in growth and productivity of forest trees throughout the Northern Hemisphere. This species is genetically diverse with variable disease activities across different regions of the world. In North America, A. solidipes in the Colorado Plateau exists in drier habitats and causes more disease on hardwoods in comparison with A. solidipes in the northwestern USA (McDonald 1999). Here, we address 1) the discovery of cryptic genotypes of A. solidipes located within or near the Colorado Plateau region, 2) the analytical issues associated with rDNA sequences containing high levels of heterogeneity, and 3) the significance of these cryptic A. solidipes genotypes.

Citation

Hanna, J. W.; Klopfenstein, N. B.; Kim, M. -S.; Ashiglar, S. M.; Ross-Davis, A. L.; McDonald, G. I. 2012. Discovery of cryptic Armillaria solidipes genotypes within the Colorado Plateau. In: Zeglen, S.; Palacios, P., comps. Proceedings of 59th Annual Western International Forest Disease Work Conference; 2011 October 11-14; Leavenworth, WA. Portland, OR: U.S. Department of Agriculture, Forest Service, Forest Health Protection, Region 5. p. 145-148.