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Sweet corn is mutation of field corn in which greater accumulation of sugars  and water soluble polysaccharides provide specific taste and texture. It is  consumed in the milky stage of the endosperm, so the product’s quality and  its appearance are important as well as ear yield. That is why breeders pay  the same attention to these traits in breeding process. In this paper we  analyzed combining ability and mode of inheritance of ear yield and yield  components in sweet corn, such as kernel-row number, and ear length, by the  use of diallel crosses of six sweet corn inbred lines. ANOVA showed that  estimates of general (GCA) and specific (SCA) combining abilities were highly  significant (p<0.01) for all observed traits. Nonaditive gene effects were  more significant in the expression of ear yield and ear length, while  additive gene effects were more important for kernel-row number. Analysis of  components of genetic variance was in agreement with the results of ANOVA of  combining ability. The mode of inheritance of kernel-row number was partial  dominance, while overdominance was of greater importance for ear yield, and  ear length. Inbred line L4 was indicted as the most desirable, among the  examined set of inbreds, in the further sweet corn breeding programs, due to  its significant GCA effects concerning ear yield and number of kernels per  ear, and ear yield performances of the hybrids in which one of the components  was this inbred, according to SCA and hetrosis estimates

Inheritance of ear yield and its components in sweet corn (Zea mays L. saccharat)