Protein marker polymorphism and heterosis in a diallel set of maize
1997
Mladenovic-Drinic, S. | Konstantinov, K. | Coric, T. | Ignjatovic, D. (Maize Research Institute "Zemun Polje", Belgrade - Zemun (Yugoslavia))
Protein molecular markers were used in a study of maize genome structure and function as well as the heterotic effect. A field trial with replications was set up with five generations (parents, F1, F2 and backcrosses) from 10 crosses to evaluate grain yield and yield components. Additionally, they were analysed for polymorphism of embryo salt soluble proteins and isozymes. The analysis of embryo salt soluble proteins showed that all genotypes studied had a specific protein pattern. The number of hybrid specific protein bands identified in crosses with a higher heterotic effect for yield was greater than in crosses with lower heterosis. The comparison of heterosis for grain yield and index of similarity suggests that inbred lines with the lowest level of salt soluble protein similarity expressed the highest heterosis for grain yield. Estimated correlations between isozyme diversity and grain yield and heterosis for grain yield were low and insignificant.
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