| 0 | PI 632746 | B116 | Zea mays L. subsp. mays | Iowa, United States | |  | Historic | 2003 | DEVELOPED | 2002 | | | | | Breeding material | Vigorous inbred line developed from the F2 population developed from a cross of B97 and B99. Flowers about 80 days after planting and would be classified for the AES 700-800 Maturity Group. Hybrids that include B116 as one parent have exhibited consistently high grain yield in trials conducted in Iowa and the North Central Region. Yellow, dent kernels are produced on large ears with pink-to-red cobs. Yield of B116 per se is greater than for most parental inbreds. Above average tolerance to 1st and 2nd generation European corn borers (Ostrinia nubilalis Hubner), northern corn leaf blight (Exserohilum turcicum Pass.), and gray leaf spot (Cercospora zeae-maydis Tehron and Daniels). | 1643963 | PI 632746 |
| 1 | PI 632413 | 'GEMS-0002' | Zea mays L. subsp. mays | Ohio, United States | NC7 |  | | 2002 | DEVELOPED | 03/24/2002 | | | | | Cultivar | Selected from the GEM FS8(A)S:S09 population. Genetic composition of the population FS8(A)S (PI 536619) is estimated to be approx. 50% BSSS related, 21% tropical, 18% southeastern U.S., and 11% diverse Corn Belt (with a high proportion of inbred C103A). Breeder's seed of GEMS-0002 was increased by controlled full-sib pollination of the S3 in the 2002 OSU nursery. Seed from over 100 ears was bulked for distribution. It has been released to GEM cooperators following the GEM protocol. Mid-silk date is approx. one week earlier than that of B73 in Ohio, and it produces moderate amounts of pollen. Plant height is quite moderate (ave=133.2 cm) and ear placement is slightly below mid-plant height (ave=55.8 cm). Cob color is white and ears generally display 12 kernel rows (average 12.5, range 10-16). Ear width is approx. 3.8 cm (range 3.5 to 4.4 cm). Ear length is approx. 13.2 cm (range 11 to 15 cm). Kernels are yellow to yellow-orange in color and are slightly dented to flinty and have a 100 kernel weight of 21.7 g. Grain protein composition is somewhat elevated (approx. 2 to 2.5 points above B73) and average density is 1.35 g/cc. Line has not been exposed to high levels of foliar or stalk-rotting diseases and definitive information concerning its susceptibility to pests and diseases is unknown. GEMS-0002 is intended as a breeding resource for the improvement and diversification of elite, non-'Lancaster Sure-Crop' related inbreds. Unique in that it has a relatively high proportion of tropical germplasm yet is able to impart earliness to hybrids. It has potential as a source of germplasm in breeding programs throughout much of the U.S. Corn Belt. Recommended that it be introduced into breeding programs by crossing with elite inbreds followed by modified pedigree selection. Using this method, it is anticipated the agronomic characteristics can still be improved since only one cycle of selection has been practiced. | 1641703 | PI 632413 |
| 2 | PI 601170 | 'LH82' | Zea mays L. subsp. mays | Iowa, United States | NC7 |  | | 1985 | DEVELOPED | 1984 | | | | | Cultivar | Dent corn best adapted to most regions of the United States. Maturity of 73 days from emergence to 50% of plants in silk (1428 heat units). Plant is 176 cm in height to tassel tip, 76 cm ear height to base of top ear, 13 cm length of top ear internode, no tillers, strong two-ear tendency per stalk, and normal cytoplasm. Leaf 5GY 4/6 (Munsell Color Charts for Plant Tissues), less than 30 degrees angle from stalk (upper half), light sheath pubescence, few marginal waves, few longitudinal creases, 11 cm at widest point of ear node leaf and 73 cm long, and 11 leaves per mature plant. Tassel has 8 lateral branches, branch angle is less than 30 degrees from central spike, penduncle length is 0 cm from top leaf to basal branches, medium pollen shed, pink anther, and glume green with brown margin. Ear 14 cm long, 40 mm mid-point diameter, 116 grams, kernel rows distinct and 22 in number, silk color green, husk color light green when fresh and buff when dry, medium husk extension (barely covering ear) at harvest stage, husk leaf short (<8 cm), shank 14 cm long, 7 internodes, upright position at dry husk stage, slight taper, and average drying time. Kernel (from ear mid-point) 11 mm long, 7 mm wide, and 3 mm thick, shape grade 20-40, pericarp colorless, aleurone homozygous and white, endosperm yellow with normal starch, and 20 grams in weight per 100 seeds. Cob 27 mm in diameter at mid-point, strong, and red. Most closely resembles A632Ht for maturity, W153R for plant type, Wf9 for ear type, and LH39 for usage. | 1165596 | PI 601170 |
| 3 | PI 601004 | 'LH132' | Zea mays L. subsp. mays | Iowa, United States | NC7 |  | | 1983 | DEVELOPED | 1983 | | | | | Cultivar | Dent type adapted to most areas of the U.S. Maturity 61 days from emergence to 50% of plants in silk (1363 heat units). Plant 226 cm in height to tassel tip, 79 cm to base of top ear, top ear internode is 13 cm long, no tillers, single ear per stalk, and normal cytoplasm. Leaf color 5GY 4/4 (Munsell Color Charts for Plant Tissues), less than 30 degree angle from stalk, light sheath pubescence, no marginal waves, few longitudinal creases, 8 cm at widest point of ear node leaf, 85 cm ear node leaf, with 12 leaves per mature plant. Tassel has 9 lateral branches, 30-40 degree branch angle from central spike, penduncle length from top leaf to basal branches 11 cm, medium pollen shed, anther purple and glume green with purple stripe. Ear 13 cm long, 40 mm mid-point diameter, 74 grams, 16 distinct and straight kernel rows, green silk, husk light green when fresh and buff when dry, husk extension 8-10 cm beyond ear tip, husk leaf less than 8 cm, shank 8 cm long with 7 internodes, pendent at dry husk stage, slight taper, and average drying time (unhusked ear). Kernel 12 mm long, 8 mm wide, 4 mm thick, 30-60% rounds, colorless pericarp, aleurone homozygous and white, endosperm yellow, normal starch type endosperm, and 28 grams per 100 seeds. Cob 30 mm diameter at mid-point, strong, and red. Disease and insect resistance not tested. Most closely resembles LH119 for maturity, plant type, ear type, kernel type, and usage. In later progeny inbred releases, the developer writes: LH132 has been used as a replacement for B73 in many hybrid combinations. LH132 is a superior seed parent to B73 and greatly improved the production and quality of hybrid seed. LH132 also contributes a larger seed size which reduced the amount of discard that was common with B73. LH132 hybrids have lower ear placement than comparable B73 hybrids and have significantly improved stalk and root qualities. | 1157405 | PI 601004 |