July
1999
, Volume
83
, Number
7
Pages
675
-
680
Authors
A. E.
Dorrance
,
Department of Plant Pathology, The Ohio State University, Wooster 44691
;
O. K.
Miller
,
Department of Biology
, and
H. L.
Warren
,
Department of Plant Pathology, Physiology and Weed Science, Virginia Polytechnic Institute and State University, Blacksburg 24061-0331
Affiliations
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RelatedArticle
Accepted for publication 19 March 1999.
Abstract
ABSTRACT
Isolates of Stenocarpella maydis from seed companies and plant disease clinics in the United States and the Republic of South Africa were assayed for isozyme polymorphisms and cultural variability. A low level of isozyme polymorphisms was detected in this collection of isolates. Isozyme polymorphisms were detected for α-esterase, hexose kinase, and malate dehydroge-nase of the enzymes assayed. Fungi often have limited variability among isozyme profiles, and this is especially true for fungi that have host specialization such as biotrophs or fungi with formae speciales designations. Optimum growth temperature, colony color, and pycnidiospore production were also measured. All isolates had an optimum temperature of 28 to 31°C for colony growth on acidified potato dextrose agar. Colony color and pycnidiospore production were variable over the course of several experiments, indicating that these phenotypes are poor genetic markers.
JnArticleKeywords
Additional keywords:
Diplodia ear rot,
Diplodia stalk rot,
maize
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ArticleCopyright
© 1999 The American Phytopathological Society