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The pattern of inheritance of stalactiform blister rust (Cronartium coleosporioides Arth.) and western gall rust (Endocronartium harknessii Y. Hiratsuka) resistance in lodgepole pine (Pinus contorta Dougl. var. latifolia Engelm.) was examined in a 10-year-old progeny trial of 214 open-pollinated families from 24 provenances in British Columbia. Provenance means and family-within-provenance means differed significantly for the two stem rusts. A positive relationship between elevation of provenance and provenance means for stalactiform blister rust score was found (R² = 0.34, P < 0.01). Coastal provenances had the highest infection level for western gall rust. The heritability estimates appropriate for mass, family, and provenance selection on stalactiform blister rust resistance were 0.21 ± 0.11, 0.42 ± 0.17, and 0.74 ± 0.31, respectively. The heritability estimates appropriate for mass, family, and provenance selection on western gall rust resistance were 0.14 ± 0.09, 0.34 ± 0.16, and 0.77 ± 0.33, respectively. The large positive genetic correlation (0.49 ± 0.27) between stalactiform blister rust and western gall rust indicates that selection will simultaneously improve both traits. For. Sci. 34(4):1067-1075.
Department of Forest Science, University of Alberta, Edmonton, Alberta, T6G 2H1
Publication date: December 1, 1988
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Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.