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Molecular marker heterozygosity and its relationship to hybrid performance in seventeen elite maize inbreds
Pages: 691-700
Year: Issue:  5

Keyword:  RAPD markerZea mays L.genetic distancecombining abilitymolecular marker assisted breeding;
Abstract: In maize (Zea mays L.) single-cross breeding programs,identifying high yielding hybrids and inbred lines with superior performance is an important problem.The seventeen inbred lines were analyzed by random amplified polymorphic DNA (RAPDs),and the relationship between performance data from a diallel cross among seventeen elite maize inbreds and RAPD marker were evaluated for nine traits of agronomic importance,including grain yield.Cluster analysis based on similarity coefficient calculated from the 229 non-redundant RAPDs variants divided the 17 inbreds into five major groups,which is consistent with the pedigree information.Correlations between genetic distance and hybrid performance,and between genetic distance and specific combining ability (SCA) were generally positive and significant.Correlations of average GD,SCA and F1 yield after clustering were much higher than values before clustering.Average yield and average GD among groups were greater than that within group.Our results suggest that RAPDs can be used to reveal relationships among maize inbred,and divided inbred lines into different group and thus provides a method for parent mating and molecular marker assisted breeding.
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