Application of dialle analysis in the study of the combination ability of corn

Abstract

The article discusses the results of the use of diallelic analysis in the study of self-pollinated lines of corn. The average grain yield of self-pollinated lines (2,30 – 2,84 t/ha), as well as the average group indicators of hybrids (3,29 – 5,49 t/ha) were noted. The effects of general and variance of the specific combining ability of the lines were revealed. Ranking by grain yield allowed us to arrange the lines in the following sequence: CL 7 <MK 130 U <RSK 25 <PH26 <Yk12D2, Om 255 <MK 11 <Ch46 <Bg1266 <LV32 <RSK 7 <Yuv 19 <RSK 3 <Om232, KS 25 <Od 28. The results of the analysis of the combining ability of self-pollinated maize lines indicate a low value of the GCA effects in the lines of CL 7, Ch46 and a high effect of GCA in the lines of RSK 7, MK11, RSK 3. Significantly significant indicators of the components of dominance (H1, H2.), in absolute value exceed the values of component D, characterizing the additive effect of genes. The difference between the total average trait of all offspring (ml1) and the average parental forms (ml0) has positive values, which indicates that dominance is directed towards the parental forms with a greater severity of the trait. An analysis of the components indicates that, depending on the growing conditions, 2–7 genes or groups of genes affect the manifestation of grain yield. In 2016-2017 The paratypical component of dispersion had a significant effect on grain yield (E).