Abstract— Maize breeding has made a greater contribution to the increases of maize yield. Maize foundation inbred lines play an irreplaceable role in maize breeding. The formation of foundation lines were the results of many factors, the key factors of which were accord with breeding trends, adapt to environment in much of region, and have appropriate representativeness for particular heterotic group. Foundation lines possess well structure of source and better yield stability, this contribute to their combinations with coordinated source-sink relationship and adapt to close planting. Foundation lines resist major stress factor and adapt to the cropping systems and cultural practices of main maize producing areas. And foundation lines concentrate numerous unique alleles of particular heterotic group, so they are easy to generate heterotic with lines from other heterotic group. For new foundation lines breeding, the existing foundation lines are preferred basic germplasm and cross breeding unites with pedigree selection is effective breeding method. Moreover, we give a integrate breeding method base on rapid advances in plant-breeding technology.
Keywords— Maize, Foundation inbred lines, China, formation.
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