Stierwalt and Crane (MNL 47: 166, 1973) reported a mutation opaque4 (o4) which, unlike fl1, is recessive and does not exhibit dosage effects. As they found it to be allelic to fl1, it is now designated as fl1-o4. Crosses of this mutant with fl1-Ref males gave ears with only floury seeds, confirming Stierwalt and Crane’s findings of allelism. Crosses of +/o8 plants as males onto +/fl1-o4 plants gave ears that segregated for normal and floury kernels, again confirming allelism of o8 and fl1.
Since o8 is allelic to both fl1-Ref
and fl1-o4, the o8 mutant should be renamed fl1-o8.
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