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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 636444 | PA 15 | Glycine max (L.) Merr. | Maryland, United States | SOY | | | 2005 | DEVELOPED | 11/01/2004 | | | | | Breeding material | PA 15 soybean germplasm was released by ARS, USDA on 11-1-2004 to provide breeders with germplasm to increase the persistence of crop residue. In five years of field tests at Beltsville, MD, PA 15 had an average of 76% soil cover by crop residue at the time of the no-till planting of the next year’s spring crop compared to the 52% for the cultivar Hutcheson. After a mulch tillage in the spring, PA 15 had 53% soil coverage by crop residue and Hutcheson had 20% soil coverage when averaged over four years. When crop residue from the November 2002 harvest was allowed to over-winter for two years of fallow, PA 15 had 40% crop residue surface coverage compared to 8% for Hutcheson at the 2004 April Spring planting. Over a six-year period at Beltsville, MD, dry crop residue biomass averaged 3.84 T/A for PA 15 and 3.46 T/A for Hutcheson, and the average height of PA 15 was 52.1 inches compared with 36.2 inches for Hutcheson.PA 15 was tested in the Uniform Soybean Tests of the Southern States in the maturity group V preliminary test in 1996 at 10 locations. PA 15 had an average seed yield of 36.4 bushels per acre over all locations in the 1996 prelim test compared to 51.9 for the cultivar Hutcheson. Over all locations, PA 15 had an average height of 47.5 inches compared to 28.3 inches for Hutcheson and had a lodging score of 2.9 compared with 2.3 for Hutcheson. The oil concentration was 19.5% compared with 21.3% for Hutcheson.PA 15 had a seed size of 13g per 100 seed compared with 14.9g per 100 seed for Hutcheson. PA 15 is a maturity group V line with yellow seeds with dull luster and brown hila, white flowers, gray pubescence and indeterminate growth. In tests conducted at Stoneville, MS, PA 15 was resistant to stem canker. At Jackson, TN, PA 15 had a score of 4.9 for response to soybean cyst nematode race 3, a score of 4.1 for resistance to race 5, and a score of 2.0 for resistance to race 14. PA 15 also had scores of 3.5 and 3.8 for response to Meloidogyne arenaria and Meloidogyne incognita nematodes, respectively. | 1668345 | PI 636444 |