Genetic architecture of western gall rust (Peridermium
harknessii) in California pine forests.
Vogler, D. R., Kinloch, B. B., Jr., Cobb, F. W., Jr., Libby, W.
J., Jr., and Popenuck, T. L. 1988.
Department of Plant Pathology, University of California,
Berkeley, CA 94720, and U.S.D.A., Forest Service, Institute of Forest
Genetics, Berkeley, CA 94701.
Phytopathology 78:1555. (1988)
Aeciospores were collected from single galls on seven native pine
species from coastal and inland mountain forests in California.
Sieved and air-dried spores were ground in glass tissue grinders or
homogenized with a Mini-BeadBeater, and then subjected to starch gel
electrophoresis in each of four gel-buffer systems. Resolution was
obtained for 16 enzymes encoded by 18 putative loci. As reported
previously (D. R. Vogler, Phytopathology 77:1242), all enzyme loci
from coastal California isolates were monomorphic. Seven loci from
Cascade and Sierra Nevada mountain isolates were polymorphic among
sites, but monomorphic within sites; the remaining 11 loci were
mostly monomorphic and similar to those in coastal isolates. These
results strongly suggest that P. harknessii propagates
clonally and is very homogeneous genetically.
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