In a 1993 screen of M2 progeny of EMS mutagenized material (see Harper
et al., MNL 69:22) a new narrow leaf (nl) mutant allele, laboratory
nl*-1517, was identified with a reduced blade phenotype.
The blade reduction phenotype shows variable expression. Younger leaves
are more affected than older leaves, and leaf blades are shorter and more
narrow than in nonmutant siblings. Frequently the blade is entirely absent,
although the ligule, auricle and sheath are not affected. Usually, plants
with severe leaf phenotypes form no tassels, or develop only rudimentary
male flowers. No adverse effects on ear development have been observed.
The mutant was included in a B-A translocation mapping project in 1994.
The mutant phenotype segregated in the F1 progeny of several crosses between
nl*-1517 heterozygotes and males which were marked, hyperploid heterozygotes
of the genotype TB-3Sb/cl1. Therefore, the new mutant nl*-1517
is placed on chromosome arm 3S, distal to cl1.
Please Note: Notes submitted to the Maize Genetics Cooperation Newsletter may be cited only with consent of the authors
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