Material provided by E. A.
Kerr (V543) was found to be
resistant to Botrytis cinerea.
Screening method was:
Farley, J. D., W. L. George, Jr., and
E. A. Kerr Resistant to Botrytis
cinerea.
1) cauterize a small area of a fresh leaf scar of a 21-day-old plant with
the tip of a hot wire, 2) apply to the wound a Botrytis-agar plug from a 7-
day-old culture (potato dextrose agar), 3) place inoculated plants into a
moist chamber in the greenhouse for 48 hours, and 4) evaluate disease
severity 7 days after inoculation. B. cinerea was collected in Ohio from a
greenhouse tomato stem lesion.
Susceptible lines (Ohio M-R 13 and Ohio W-R 25) usually collapsed
within 3 to 4 days after inoculation. Resistant lines showed some tissue
breakdown at the site of inoculation, but plants did not wilt and the
small Botrytis lesion healed over.
Inheritance studies and tests with other isolates are in progress.
Fobes, J. F. and C. M. Rick
Aps, Est, and Got phenotypes.
In our work on the isozymes
of these three enzyme systems
in red-fruited and closely
allied tomato species, we have found it necessary to distinguish a number
of allozymic variants. We assemble here the alleles that will appear
shortly in various publications, as well as several additional key
allozymes. They are. named and symbolized in conformity with TGC rules
with the minor exception that the first discovered allele is given the
superscript (1).
This exception was made in deference to the
electrophoretic specialists because they mostly cannot comprehend a symbol
without an allelic notation. The most characteristic phenotypic bandings
as they appear in our gels, are represented in the diagrams below. The +
(Marglobe) allele is represented on the left of each locus group. The mean
distance between origin and anodal front is 10.8 cm.