THE ASSESSMENT OF MAIZE GENE EFFECTS RESPONSIBLE FOR THE HEIGHT OF COB PLACEMENT

Abstract

During the research, carried out with the various materials in the various conditions we have obtained the contradictory data on the genetic control of the height of the maize ear placement. For the study of the self-pollinated lines of maize we have used the diallele analysis with the parent forms and hybrids of various generations and the scale tests with the study of splitting hybrid progeny. The article considers the genetic analysis of some hybrids due to the height of ear placement with the use of the self-pollinated lines of maize (V47, IKV18, V27, Кd12L53, V72, В29, V117, ИС134, RSK218, RSK3, SM7) and the hybrid progeny of various generations (F1, F2, F3, B1, B2) where a unified test Cavalli was used for the estimation of the conformity of the additive-dominant model. We established the contribution of non-allele correlations in the development of the trait and applied the appropriate labels (m, d, h, i, j, l). The true heterosis in the height of ear placement has been found in the maize hybrid F1 (up to 98,7%). Thus, it has been determined that the parameter [i] (additive/additive) largely contributes into the interaction of epistatic type in the hybrids Кd12L53/V47; the parameter [j] (additive/dominant) contributes a lot in the combinations RSK3/V47, V27/V47, RSK218/RSK3 and SM7/V117. In the hybrid combinations V29/V47, V117/V47, IS134/V47, SM7/RSK3 the parameters [i], [j] and [l] are not significant, i.e. there has not been revealed any non-allele interaction of genes.