Abstract
The best hybrid breeds are able to produce the highest yield and the primest quality among optimal environmental circumstances. The maize is an allogamic plant, thus the amount of yield is influenced by the viability of pollens responsible for fertilization. The viability of pollen is genetically determined, but the environmental factors have great impact as well. We are discussing in this paper about the relationship between the viability of maize pollen and the fertilization. Com pollens are classified into the so-called short-lived pollens' group (Pfundt 1910, Holman-Brubaker 1926, Vasil 1961, Kozaki 1975 in Barnabas 1982) According to the studies of Dafni and Firmage (1999), several factors influence the viability of the pollen. During their research they classified these factors into three main groups; furthermore they found some other important, but not classifiable coefficients. They carried out the following specification as a result of their classification and analysis: Environmental factors.
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