--Peter A. Peterson
This wx allele expresses wx to Wx events. It arose
from the cross C-I Sh Bz Wx x C sh bz wx as
a colorless wx-mutable kernel. The question of the basis of this
control of mutability was tested by crossing the heterozygote, C-I Sh
Bz wx-m/C wx, A/a-o by sh wx/wx, a-m1/a-m(r). The male tester
represents a reporter allele for En of kernel endosperm a-gene
mutability. The rationale is to correlate a-gene reporter allele
mutability with wx-mutability in order to test En inheritance.
A small sample of progenies of this cross is given below.
Two items of interest are apparent. The distribution of wx-m to wx-o is close to 1:1 in this testcross indicating that the wx-m allele is 1/2 of the wx alleles and 1/2 are showing mutability. If the element was independent, this 1:1 ratio would be distorted.
More convincing is the sampling of wx-mutability among the a-reporter
alleles. All the spotted that were tested were wx-mutable. This
supports the contention that the only En is cosegregating with wx-mutability.
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