Comparison of hybrid maize obtained from inbred lines that are selected via top-crossing and discriminant analysis

Authors: AHMET ÖZ

Abstract: This research was done at the Black Sea Agricultural Research Institute in Samsun, in 2006 and 2007. The study was conducted to determine the effectiveness of discriminant analysis in determining the parents among inbred lines in hybrid corn breeding. Grain yield and some yield components of the hybrid maize, which was obtained from inbred lines that were selected in accordance with top-crossing and discriminant analysis, was examined in the research. According to the average of 2 years, the average grain yield of 11 maize hybrids obtained via top-crossing was 9160 kg ha^{-1}, whereas the average grain yield of 8 maize hybrids obtained in accordance with discriminant analysis was 8550 kg ha^{-1}. Among the hybrid maize obtained via top-crossing, the TK-120 × TK-108 hybrid gave the highest yield (10,820 kg ha^{-1}). Among the hybrid maize obtained in accordance with discriminant analysis, the TK-169 × TK-413 hybrid gave the highest yield (9340 kg ha^{-1}). Some of the hybrids that used inbred lines selected via discriminant analysis had a higher grain yield than some of those that used inbred lines selected via top-crossing. In view of the obtained results, it can be stated that determining parents via discriminant analysis can supplement the deficient aspects of the top-crossing method.

Keywords: Discriminant analysis, grain yield, maize, top cross, yield components

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