a mutable allele under two-factor control
--Michael G. Muszynski and Peter A.
The c2-m884259Yallele originated
as an exception from c2-m826040 (MNL 57:2). The mutability of this
new allele seems to be under control of an independent factor. Without
the factor the allele is pale; with the factor, the allele shows a pale
coloration with spots or colorless with spots (2-5 a-c). Selfed ears originating
from c2-m/c2 kernels segregate 3/8 pale:3/8 spotted:2/8 colorless.
When spotted kernels from the selfed ear are used as a male on c2/c2
testers, the progeny ears segregate 1 pale:1 colorless or all pale without
any spots. These data indicate that the factor controlling mutability is
not male transmissible and may be linked to a gametophyte factor or a pollen
lethal gene. Tests of this hypothesis and of system relations are underway.
Please Note: Notes submitted to the Maize Genetics Cooperation
Newsletter may be cited only with consent of the authors
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