Abstract
IN the course of an investigation of haploidy in maize, a number of haploids were pollinated by normal diploid males. The progenies were grown to anthesis and classified for pollen abortion, with the thought that some of them would be monosomic, that is, would arise from n-1 eggs. An F1 plant was found to be semi-sterile (male) and was self-pollinated and outcrossed with a normal female. Subsequent examination of the selfed and outcrossed progenies revealed that the original semi-sterile F1 plant was heterozygous for a reciprocal translocation. The finding agrees with earlier observations in which recovery of reciprocal translocation from haploids of Triticum vulgare1 and of Sorghum vulgare2 had been made.
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