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Detection and Identification of Haploids -A number of methods have been developed for the detection of haploids in a population of diploids. Although the most effective method is the use of genetic markers to be discussed in the next section, phenotypic effects can also be used for identification of haploids.

The vegetative and floral parts and the cell size in haploids are reduced relative to diploids.

In maize, Greenblatt et al (1967) selected 45 seedlings out of 10,000 seedlings, on the basis of size (i.e. thin coleoptiles, etc.) and five of them were found to be monoploids showing some success in screening for haploidy.

Stomata size, pollen size and pollen abortion can be other criteria to help initial screening, although in each case cytological confirmation will be essential.