Role of genetic resources from different geographic and climatic regions in simultaneous breeding for high quality protein maize (HQPM) and stress tolerance
2012
Due to the low biological value of proteins of common maize, it was
reinitiated breeding for high protein quality maize (HQPM) using three
genetic systems, namely: opaque-2 gene, endosperm modifier genes and enhancer
genes, which are increasing lysine and tryptophan content in opaque-2
background In order to alleviate effect of abiotic and biotic stress factors,
the genotypes with tolerance to those factors were included. Genetic
resources originating from North, Central and South America, then West,
Central and Southern Africa and gene bank of Maize Research Institute “Zemun
Polje” were used. Combining breeding approaches in selection of genetic
resources, field plot techniques and laboratory analysis, it was created
large number of early QPM varieties, inbred lines and hybrids with modified
endosperm and high yield potential under poor and good growing conditions.
Created lines exhibited high combining ability in conventional and
non-conventional hybrids. Yield trials showed that QPM hybrids are competing
with commercial hybrids of common maize.
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