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| ACCESSION | PLANT NAME | TAXONOMY | ORIGIN | GENEBANK | IMAGE | AVAILABILITY | RECEIVED | SOURCE TYPE | SOURCE DATE | COLLECTION SITE | COORDINATES | ELEVATION | HABITAT | IMPROVEMENT LEVEL | NARRATIVE | | |
|---|
| 0 | PI 607386 | BS21(R)C7 | Zea mays L. subsp. mays | Iowa, United States | NC7 |  | | 1999 | DEVELOPED | 1998 | | | | | Breeding material | Developed 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. | 1573435 | PI 607386 |
| 1 | PI 607387 | BS22(R)C7 | Zea mays L. subsp. mays | Iowa, United States | NC7 |  | | 1999 | DEVELOPED | 1998 | | | | | Breeding material | Developed 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 500-600 | 1573436 | PI 607387 |