Combining abilities of silage maize grain yield

Zivanovic, T. and Secanski, M. and Momirovic, G.S. and Prodanovic, S. (2005) Combining abilities of silage maize grain yield. Journal of Agricultural Sciences, 50 (1). pp. 9-18.

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The aim of the present study was to evaluate the following parameters of maize grain yield: variability of inbred lines and their diallel hybrids, superior-parent heterosis and general and special combining abilities. According to obtained results of the two-year study, it can be concluded that variability of this trait is significantly affected by a genotype, year and their interaction. As expected,hybrids had higher average grain yields than inbreds due to the depression of this trait that occurs in inbreds during inbreeding. The highest average value of heterosis for gain yield was detected in the hybrid ZPLB405 x ZPLB406 (123.0% and 178.1% in 1997 and 1998, respectively). The estimation of combining abilities was done on the basis of diallel hybrids after the method established by Griffing, 1956, (method II, mathematical model I). The analysis of variance of combining ability for grain yield indicated highly significant values of GCA and SCA for the observed trait in both study years. Grain yield inheritance was more affected by non-additive genes (dominance and epistasis) as indicated by the GCA to SCA ratio that was smaller than unity. The inbreds ZPLB401 and ZPLB406 had high GCA effects, while the hybrid combinations ZPLB401 x ZPLB402, ZPLB401 x ZPLB403, ZPLB401 x ZPLB405, ZPLB402 x ZPLB406, ZPLB403 x ZPLB406, ZPLB404 x ZPLB406, ZPLB405 x ZPLB406 had high SCA effects in both study years. These hybrid combinations include one parent with high GCA effects and other with low GCA effects. Furthermore, there are combinations ZPLB402 x ZPLB405, ZPLB403 x ZPLB405 and ZPLB404 x ZPLB405 with significant SCA effects that include parents with low GCA effects. This is probably the result of the additive type (additive x additive) of interaction between parents

Item Type: Article
Author Affiliation: Tomislav Živanović, PhD., Assistant Professor, Gordana Šurlan-Momirović, PhD., Professor, Slaven Prodanović, PhD., Associate Professor, Faculty of Agriculture, University of Belgrade, 11081 Belgrade – Zemun, Nemanjina 6, P.O. Box 14, Serbia and Montenegro
Subjects: Plant Production
Divisions: Maize
Depositing User: David T
Date Deposited: 15 Dec 2010 16:19
Last Modified: 03 Jan 2011 21:08
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