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ACCESSIONPLANT NAMETAXONOMYORIGINGENEBANKIMAGEAVAILABILITYRECEIVEDSOURCE TYPESOURCE DATECOLLECTION SITECOORDINATESELEVATIONHABITATIMPROVEMENT LEVELNARRATIVE
0PI 607386BS21(R)C7Zea mays L. subsp. mays Iowa, United StatesNC7KERNELS1999DEVELOPED1998Breeding materialDeveloped from a cross of BS5, as a source of earliness, and BS20, which contributed root and stalk strength. Germplasm of BS21 includes about 54% Reid Yellow Dent, 18% Minnesota 13, 13% European Flint, and 15% from sources of unknown origin. Seven cycles of reciprocal recurrent half-sib selection with BS22 as tester were completed. Selection emphasized greater grain yield and improved root and stalk strength. Direct response was 4.4% cycle-1 for grain yield. Maturity classification is AES 500-600.1573435PI 607386
1PI 607387BS22(R)C7Zea mays L. subsp. mays Iowa, United StatesNC7KERNELS1999DEVELOPED1998Breeding materialDeveloped by intermating 16 earlier maturity inbred lines. Based on origin of lines, germplasm of BS22 includes 45% Reid Yellow Dent, 13% Lancaster Sure Crop, 9% Minnesota 13, and 33% from sources of unknown origin. Seven cycles of reciprocal recurrent half-sib selection with BS21 were completed. Selection emphasized greater yield and improved stalk and root strength. Direct response was 4.4% cycle-1 for grain yield. Maturity classification is AES 500-6001573436PI 607387