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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 612343 | Shrunken Zapalote Chico | Zea mays L. subsp. mays | Florida, United States | NC7 |  | | 1999 | DEVELOPED | | | | | | Breeding material | Sweet corn population developed to have improved resistance to the fall armyworm (Spodoptera frugiperda). The sh2 and a1 genes at positions 149.2 and 149.0 on 3L were introgressed into Zapalote Chico 2451 from Tifton, GA. Resistance based on chemical antibiosis and conferred by the flavone glycoside maysin and its chemical analogues. Maysin is primarily expressed in emerging silk and specifically conveys resistance to Lepidoptera insects entering through the silk channel. Maysin levels in the fresh silk averages 0.97%, and exceeded the 0.2% level commonly considered adequate for resistance. | 1587790 | PI 612343 |