Combining abilities of inbred lines for dry matter yield of maize (Zea mays L.) hybrids

Abstract

This study encompass the investigation on combining abilities of six maize inbred lines and their diallel hybrids of F1 generation for dry matter yield of both, the whole plant and the ear. The analysis of combining abilities was performed following Griffing (1956) method 2, model I, without reciprocal crosses, while the analysis the genetic components of variance and the regression analysis were done after the model proposed by Hayman and Jinks (1954) and Mather and Jink (1971). Dominant gene effects in inheritance of dry matter yield of the whole plant and the ear were determined by the analysis of combining abilities. The role of these effects are also observable from the analysis of genetic components of variations and results of the Vr/Wr regression analysis. The inbred line ZPLB 406 was the inbred with the highest GCA effects.

U ovom radu su proučavane kombinacione sposobnosti šest inbred linija kukuruza i njihovih dialelnih hibrida F1 generacije za prinos suve materije ćele biljke i prinos suve materije klipa. Analiza dialelnih ukrstanja za kombinacione sposobnosti je rađena po Griffing-u (1956) a analiza komponenti genetičke varijanse i regresiona analiza po Jinks-u (1954) i Hayman-u (1954), Mather-u i Jinks-u (1971). Na osnovu analize kombinacionih sposobnosti utvrđeno je da dominantno delovanje gena ima glavnu ulogu u nasleđivanju ovih osobina. Najbolji opšti kombinator za ispitivane osobine bila je linija ZPLB 406. Dominantne komponente (H1 i H2) genetičke varijanse su bile veće od aditivne (D) dok rezultati Vr/Wr regresione analize ukazuju na superdominaciju u nasleđivanju ispitivanih osobina. Utvrđena je visoka heritabilnost u širem smislu što govori o velikom značaju dominantnih gena na njihovo ispoljavanje.