En was isolated from an unstable wx allele, identified as wx-84-4. This arose out of a population cross of C-I Sh Bz Wx; En, En x C sh bz wx. wx-84 -4 was one of 12 wx alleles isolated but two appeared to have instability. Because only two were isolated from two different populations, only those values will be presented.
wx-84-4 - 1 in 1.9 X 10-6
wx-84-11 - 1 in 3.9 x 10-5
This is a conservative estimate because the other 11 have not been verified for instability or wx confirmation.
Peter A. Peterson
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