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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 | | |
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| 0 | PI 608782 | BS13(S2)C1 | Zea mays L. subsp. mays | Iowa, United States | NC7 |  | | 1992 | DEVELOPED | | | | | | Breeding material | BS13(S2)C1 is a yellow dent breeding population that was developed from Iowa Stiff Stalk Synthetic (BSSS) by seven cycles of half-sib selection [BSSS(HT)C7] and one cycle of S2 selection. Half-sib selection was initiated in BSSS in 1939 with double-cross Iowa 13 (J. Am. Soc. Agron. 38:108-117). [(L317 x BL239)(BL345 X MC401)], used as the tester and designated as BSSS(HT). After seven cycles of half-sib selection, one cycle of S2 selection was completed to form BS13(S2)C1. Evaluation of BSSS(HT)C7 after seven cycles of half sib selection showed that selection was effective for the yield improvement of the population itself and in crosses with testers (Crop Sci. 13:451-456; Crop Sci. 14:881-885). Selections from the cycles of selection of BSSS have shown it is a superior source population for the extraction of inbred lines that have high yield in crosses with Mol7. B73 was one of the 10 S1 selections used to form the sixth cycle, BSSS(HT)C6. B84 was one of the 10 S2 selections from the seventh cycle, BSSS(HT)C7. BSSS(HT)C7 was renamed as BS13(S2)C0, the population for S2 selection. BS13(S2)C1 is a breeding population that should be useful for the extraction of lines that have high yield as lines themselves and good combining ability with lines of 'Lancaster Surecrop' background. Although some selection pressure has been imposed for stalk lodging and first brood European corn borer (Ostrinia nubilalis Hubner) resistance the level of resistance is not high for either trait. | 1082057 | PI 608782 |
| 1 | PI 608783 | BS16 | Zea mays L. subsp. mays | Iowa, United States | NC7 |  | | 1992 | DEVELOPED | | | | | | Breeding material | BS16 is a yellow semi-dent breeding population that was developed by six cycles of mass selection for adaptiveness in the ETO Composite from Colombia, South America (Crop Sci. 12:203-206). BS16 is adapted to central Iowa and its resistance to feeding by first and second-brood European corn borer (Ostrinia nubilalis Hubner) is above average. BS16 was tested as a cultivar in replicated yield tests (Crop Sci. 12:203-206); it had greater yield, similar grain moisture and stalk lodging, and greater root lodging and dropped ears than Iowa Stiff Stalk Synthetic. The combining ability of BS16 with other breeding populations has not been determined. BS16 is characterized by vigorous plants with large tassels and considerable leaf pubescence, and ears with semi-dent kernels that range from light yellow to light orange. BS16 is of Corn Belt maturity and includes germplasm different from that currently used in most breeding populations. | 1082047 | PI 608783 |