Submitted to: USDA, Agricultural Research Service, Cultivar Release
Publication Type: Germplasm release
Publication Acceptance Date: 11/18/2002
Publication Date: 12/14/2002
Citation: FERY, R.L., THIES, J.A., GILLASPIE JR, A.G. NOTICE OF RELEASE OF 'KNUCKLEHULL-VNR', A BLACKEYE COWPEA MOSAIC VIRUS AND ROOT-KNOT NEMATODE RESISTANT, CROWDER-TYPE SOUTHERNPEA. USDA, AGRICULTURAL RESESARCH SERVICE,Washington, D.C. 18 November 2002. Interpretive Summary:
Technical Abstract: The USDA has released a new knuckle-purple-hull, crowder-type southernpea cultivar named KnuckleHull-VNR. The new cultivar was developed as a replacement for Knuckle Purple Hull, a cultivar widely grown by fresh-market growers and home gardeners throughout the southeastern United States for many years despite susceptibility to blackeye cowpea mosaic virus and root-knot nematodes. The major attributes of KnuckleHull-VNR are its excellent resistances to blackeye cowpea mosaic virus and root-knot nematodes. KnuckleHull-VNR produces dry pods at Charleston, SC, in 68 to 74 days. A typical pod is slightly curved, 20 cm long, and contains 14 peas. Fresh peas have a semi-crowder to crowder shape and a light green color. Dry KnuckleHull-VNR peas have a brown-colored, smooth seed coat, and are smaller in size than Knuckle Purple Hull peas (weight per 100 dry peas: KnuckleHull-VNR, 15.2 g; and Knuckle Purple Hull, 19.7 g). The results of replicated trials indicate that the yield potential of KnuckleHull-VNR is similar to that of Knuckle Purple Hull. KnuckleHull-VNR is recommended for use by fresh market growers and home gardeners who are concerned about yield losses to their Knuckle Purple Hull plantings caused by blackeye cowpea mosaic virus and root-knot nematodes.