| 0 | PI 441929 | 777 | Zea diploperennis H. H. Iltis et al. | Jalisco, Mexico | NC7 |  | Not Available | 1980 | COLLECTED | 12/15/1977 | La Ventana, Cerro San Miguel, Sierra de Manantlan. | 19.53333333, -104.21666667 | 2300 | Along small streams. | Wild material | Agricultural land, sometimes on edge of small maize fields. Plants to 2.5m tall. Rhizomes, 3 to 15cm growth each year, short, thick tuberous offshoots 1 x 3cm, one to several from base of culms. F 1 hybrids with maize occur. Diploid number 20. | 1336865 | PI 441929 |
| 1 | PI 441933 | G-5 | Zea luxurians (Durieu & Asch.) R. M. Bird | Jutiapa, Guatemala | NC7 |  | | 1980 | COLLECTED | 12/1975 | 1.2 km north of El Progreso on road to Jalapa. | 14.35000000, -89.85000000 | 1050 | Maize fields, gully, and hedgerows. | Wild material | Plants very much past ripeness (exceptionally dry year in this region), the husks tattered from bird predation, but some seeds still in husks, especially where leafsheaths and husk have been entwined by an ubiquitous purple Ipomea. Seeds gathered by shaking seeds out over a plastic sheet, over 1 kg gathered by two people in about 2 hours. Plants very variable in appearance: a) Completely free of long slender lateral branches (i.e., unbranched) and very slender themselves, to 2.5 meters tall if growing in densest thickets with much shade and intense competition from tall herbs (Tithonia, etc.). b) Robust and branched above, with 3-7 lateral branches, if initially shaded in their lower portions (during early growth) and in competition with shorter plants. c) Branched, with 7 to 9 branches from very base if growing in among the maize plants and free of shading, here to only 1.2 meters tall (i.e. branching quite dependent on whether plants open grown or shade grown). Plants all strictly annual, without any rhizomes. No F1 seen or any evidence of hybridization. | 1336869 | PI 441933 |
| 2 | PI 441934 | G-120 | Zea mays L. subsp. huehuetenangensis (H. H. Iltis & Doebley) Doebley | Huehuetenango, Guatemala | NC7 |  | | 1980 | COLLECTED | 01/09/1976 | Along road to Jacaltenango, about 1.5-2.5 km east-northeast of San Antonio Huista. | 15.65000000, -91.76666667 | 1350 | Region of subtropical dry forest. Maize fields and abandoned old maize fields with large populations of Zea m. mexicana and many (about 5% or more) F1 hybrids, on steep slopes. | Wild material | | 1336870 | PI 441934 |
| 3 | PI 550467 | 'B37' | Zea mays L. subsp. mays | Iowa, United States | NC7 |  | | 1971 | DEVELOPED | | | | | | Breeding material | Plant vigorous. Seed yield good. Pollen production poor. Root and stalk strength moderate. Maturity is AES800. Some resistance to northern corn leaf blight (Helminthosporium turcicum). During its era of heavy usage the line contributed high yield to single-cross hybrids particularly when grown at moderately high plant densites. In an ASTA 1975 survey reported in The Second Meeting of the Interregional Corn Conference, February 9-12, 1976 in Cincinnati, Ohio; almost 66 million kg (~145 million pounds) of parent seed were used in 1974 for hybrid production for 1975 planting. This represented 6.8% of the total 1975 requirement. | 1445403 | PI 550467 |
| 4 | Ames 21882 | 1050 | Zea perennis (Hitchc.) Reeves & Mangelsd. | Jalisco, Mexico | NC7 |  | Not Available | 1992 | COLLECTED | 12/31/1978 | Piedra Ancha, 15 km west-southwest of Ciudad Guzman. | 19.63333333, -103.58333333 | 2150 | Within orchard and upper quebrada (ravine), gentle flat slopes, very loose soil (fluffy volcanic ash?), continually and thoroughly stirred by a large rabbit-size burrowing rodent. | Wild material | Type locality is Ciudad Guzman. Rhizomes loosely intertwined. At date of collection, primary culms with dead tassels and leaves, with mature female spikelets (with alsmot all seeds shed) most prominent, with sprouting 1-4 fresh green secondary branches (1-2 dm long) in lower half of plants not uncommon. Rhizomes locally and in great abundance sprouting slender 3-6 dm long "short shoot" culms, these with usually only one, terminal, nearly sessile, female spike hidden among the clustered terminal leaves, less frequently with 2-3 lateral spikes on stem beneath (these fertile shoots resembling plants of Panicum clandestinum). Young green "short shoots" in all stages, from mature fruit to full bloom, but no evidence of any male inflorescences (cleistogamy?). There is a more-or-less clear dichotomy between the two types of stems. Mature main stems about 1.4-1.7 meters tall. After cutting (in certain areas), the secondary female "short shoots" prominent, but the above description from an area with no recent disturbance. All short shoots coming out of the rhizomes are strictly female. The female spikes of short shoots more-or-less as fertile as those of tall shoots even without any male tassels. Informant considered plants weeds to be destroyed, and also suggested these may have been planted 30 years ago for forage, which we doubt (he was less than 30 years old). Same location as Guzman 1388. | 1087279 | Ames 21882 |