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	ACCESSION	PLANT NAME	TAXONOMY	ORIGIN	GENEBANK	RECEIVED	SOURCE TYPE	IMPROVEMENT LEVEL	NARRATIVE
0	PI 633843	Tx770	Zea mays L. subsp. mays	Texas, United States	NC7	2003	DEVELOPED	Breeding material	Grain yellow, white cobs, Southern U.S. adaptation, and combines well with both Iowa Stiff Stalk Synthetic (BSSS) and tropical or subtropical lines. Good seed parent with excellent stalk quality. Flowers about 3 days later than Mo17 and 7 days earlier than Tx601Y in College Station, TX. Ears have 14-16 light yellow, semiflint kernel rows. Plants shorter than B73 with intermediate ear placement. Tassels erect and frequently have only one or two branches. Intermediate pollen shed and good anthesis-silking synchronization. Susceptible to common smut (Ustilago maydis), corn earworm (Helicoverpa zea) and southwestern corn borer (Diatraea grandiosella).	1648643	PI 633843
1	PI 614734	Oh1VI	Zea mays L. subsp. mays	Ohio, United States	NC7	2000	DEVELOPED	Breeding material	Developed as a germplasm source for resistance to Maize Chlorotic Dwarf Virus (MCDV) transmitted by the leafhopper Graminella nigrifrons. The most resistant line tested in comparative tests with other MCDV resistant/tolerant lines. Mean ear lengths and plant heights at the base of the flag leaf 16.7 cm and 141.5 cm respectively. Plants have pink silks and mean days to mid-silk averaged 98 days. Ears average 16-18 rows of orange flinty seeds, have white cob and prone to ear molds. Plants highly susceptible to smut (Ustilago maydis)	1602987	PI 614734
2	PI 693339	'A188'	Zea mays L. subsp. mays	Minnesota, United States	NC7	1995	DEVELOPED	Breeding material	A188 is a white dent inbred line of early maturity in the Central Corn Belt. It is susceptible to common smut (Ustilago maydis) and is susceptible to root lodging. This inbred is important because it was among the first maize inbred lines that would generate embryos from callus tissue culture. This trait made it important in early maize genetic engineering.	1489206	PI 693339
3	PI 549279	PUERTO RICO DE CABALLO(R)C0	Zea mays L. subsp. mays	Puerto Rico, United States	NC7	1991	DEVELOPED	Breeding material	Local dent type cultivar. Primary trait for selection was increased yield with secondary selection for root and stalk lodging. Also selected for improved disease tolerance especially major endemic tropical diseases including southern corn rust (Puccinia polysora), southern corn leaf spot (Helminthosporium maydis Race O), Northern corn leaf spot (H. turcicum), corn ear smut (Ustilago maydis), Curvularia leaf spot, and pink ear and stalk rot (Fusarium moniliforme)	1444215	PI 549279
4	PI 549280	PUERTO RICO OHIOS9(R)C0	Zea mays L. subsp. mays	Puerto Rico, United States	NC7	1991	DEVELOPED	Breeding material	Dent type population. Primary trait for selection was increased yield with secondary selection for root and stalk lodging. Also selected for improved disease tolerance especially major endemic tropical diseases including southern corn rust (Puccinia polysora), southern corn leaf spot (Helminthosporium maydis Race O), Northern corn leaf spot (H. turcicum), corn ear smut (Ustilago maydis), Curvularia leaf spot, and pink ear and stalk rot (Fusarium moniliforme)	1444216	PI 549280
5	PI 549281	PUERTO RICO OHIOS10(R)C0	Zea mays L. subsp. mays	Puerto Rico, United States	NC7	1991	DEVELOPED	Breeding material	Dent type population. Primary trait for selection was increased yield with secondary selection for root and stalk lodging. Also selected for improved disease tolerance especially major endemic tropical diseases including southern corn rust (Puccinia polysora), southern corn leaf spot (Helminthosporium maydis Race O), Northern corn leaf spot (H. turcicum), corn ear smut (Ustilago maydis), Curvularia leaf spot, and pink ear and stalk rot (Fusarium moniliforme)	1444217	PI 549281
6	PI 550719	PUERTO RICO MAYORBELA(R)C0	Zea mays L. subsp. mays	Puerto Rico, United States	NC7	1991	DEVELOPED	Breeding material	Local yellow flint type cultivar. Primary trait for selection was increased yield with secondary selection for root and stalk lodging. Also selected for improved disease tolerance especially major endemic tropical diseases including southern corn rust (Puccinia polysora), southern corn leaf spot (Helminthosporium maydis Raco O), Northern corn leaf spot (H. turcicum), corn ear smut (Ustilago maydis), Curvularia leaf spot, and pink ear and stalk rot (Fusarium moniliforme)	1445655	PI 550719
7	PI 550926	PUERTO RICO DIENTE DE CABALLO(R)C3	Zea mays L. subsp. mays	Puerto Rico, United States	NC7	1991	DEVELOPED	Breeding material	Local dent type cultivar. Primary trait for selection was increased yield with secondary selection for root and stalk lodging. Also selected for improved disease tolerance especially major endemic tropical diseases including southern corn rust (Puccinia polysora), southern corn leaf spot (Helminthosporium maydis Race O), Northern corn leaf spot (H. turcicum), corn ear smut (Ustilago maydis), Curvularia leaf spot, and pink ear and stalk rot (Fusarium moniliforme)	1445862	PI 550926
8	PI 550927	PUERTO RICO MAYORBELA(R)C3	Zea mays L. subsp. mays	Puerto Rico, United States	NC7	1991	DEVELOPED	Breeding material	Dent type population. Primary trait for selection was increased yield with secondary selection for root and stalk lodging. Also selected for improved disease tolerance especially major endemic tropical diseases including southern corn rust (Puccinia polysora), southern corn leaf spot (Helminthosporium maydis Race O), Northern corn leaf spot (H. turcicum), corn ear smut (Ustilago maydis), Curvularia leaf spot, and pink ear and stalk rot (Fusarium moniliforme)	1445863	PI 550927
9	PI 550928	PUERTO RICO OHIOS9(R)C3	Zea mays L. subsp. mays	Puerto Rico, United States	NC7	1991	DEVELOPED	Breeding material	Dent type population. Primary trait for selection was increased yield with secondary selection for root and stalk lodging. Also selected for improved disease tolerance especially major endemic tropical diseases including southern corn rust (Puccinia polysora), southern corn leaf spot (Helminthosporium maydis Race O), Northern corn leaf spot (H. turcicum), corn ear smut (Ustilago maydis), Curvularia leaf spot, and pink ear and stalk rot (Fusarium moniliforme)	1445864	PI 550928
10	PI 550929	PUERTO RICO OHIOS10(R)C3	Zea mays L. subsp. mays	Puerto Rico, United States	NC7	1991	DEVELOPED	Breeding material	Local yellow flint type cultivar. Primary trait for selection was increased yield with secondary selection for root and stalk lodging. Also selected for improved disease tolerance especially major endemic tropical diseases including southern corn rust (Puccinia polysora), southern corn leaf spot (Helminthosporium maydis Raco O), Northern corn leaf spot (H. turcicum), corn ear smut (Ustilago maydis), Curvularia leaf spot, and pink ear and stalk rot (Fusarium moniliforme)	1445865	PI 550929
11	PI 607515	AS-D	Zea mays L. subsp. mays	Minnesota, United States	NC7	1991	DEVELOPED	Breeding material	Yellow semident population developed from crosses involving eight inbred lines (A73, B14, CO106, ND255, Oh43, V3, WD, WF9). Selections from these crosses were randomly mated for six generations. The population was then subjected to several cycles of mass selection for early flowering and resistance to smut (caused by Ustilago maydis). AS-D is of AES100-200 maturity.	1071516	PI 607515
12	PI 550540	ND252	Zea mays L. subsp. mays	North Dakota, United States	NC7	1983	DEVELOPED	Breeding material	Plants medium short. Ear placement slightly above midplant. Leaves short, wide. Tassels medium. Ears long, slender with 10-14 rows. Maturity is AES200. Moderate resistance to head smut (Sphacelotheca reiliana), intermediate resistance to common smut (Ustilago maydis) and resistant to common rust (Puccinia sorghi).	1445476	PI 550540