Variation of Stem Rust Resistance in a Lodgepole Pine Provenance-Family Plantation

Washington D.C.

1988

S. 1067-1075

1 Abb., 3 Tab., 1 Anh.

Bandaufführung

7380

16085

The pattern of inheritance of stalactiform blister rust (Cronartium coleosporioides Arth.) and western gall rust (Endrocronartium 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 different significantly for the two stem rusts. A positive relationship between elevation of provenance and provenance means for stalactiform blister rust score was found. Coastal provenances had the highest infection level for western gall rust. The heritability estimates appropriate formass, family, and provenance selection on stalactiform blister rust resistance were (Formel), respectively. The heritability estimaes appropriate for mass, family, and provenance selection on western gall rust resistance were (Formel), respectively. The large positive genetic correlation between stalactiform blister rust and western gall rust indicates that selection will simultaneously improve both traits.