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United States Department of Agriculture

Agricultural Research Service

Title: Registration of ‘Waxy-Pen’ soft white spring waxy wheat

Authors
item Morris, Craig
item King, G - WASHINGTON STATE UNIV

Submitted to: Journal of Plant Registrations
Publication Type: Germplasm Release
Publication Acceptance Date: November 21, 2006
Publication Date: June 1, 2007
Repository URL: http://hdl.handle.net/10113/31434
Citation: Morris, C.F., King, G.E. 2007. Registration of ‘Waxy-Pen’ soft white spring waxy wheat. Journal of Plant Registrations.

Interpretive Summary: 'Waxy-Pen' soft white spring waxy wheat (Triticum aestivum L.) (PI 637779) was released by the Agricultural Research Service, U.S. Department of Agriculture in 2006. Waxy-Pen was developed by Dr. Craig F. Morris, USDA-ARS, Western Wheat Quality Laboratory. Waxy-Pen was released due to its fully "waxy" starch composition and unique end-use quality, and its potential for broad adaptation to U.S. Pacific Northwest (PNW) environments. Waxy-Pen was evaluated in 2005 in the Washington State University Extension Uniform Cereal Variety Testing Program as 'WA7996' and in the Western Regional Uniform Cooperative Wheat Nurseries as 'WQL7PENWX-2'. In general, Waxy-Pen is morphologically and developmentally indistinguishable from Penawawa except for the waxy endosperm trait. Genetic material of this release has been deposited in the USDA National Plant Germplasm System (http://www.ars-grin.gov/npgs/) where it will be available after the expiry of the Plant Variety Protection for research purposes, including development and commercialization of new cultivars.

Technical Abstract: 'Waxy-Pen' soft white spring waxy wheat (Triticum aestivum L.) (PI 637779) (Reg. No. CV-________) was released by the Agricultural Research Service, U.S. Department of Agriculture in 2006. Waxy-Pen was developed by Dr. Craig F. Morris, USDA-ARS, Western Wheat Quality Laboratory. Waxy-Pen was released due to its fully "waxy" starch composition (< 1% amylose) and unique end-use quality, and its potential for broad adaptation to U.S. Pacific Northwest (PNW) environments. Waxy-Pen is a back-cross-five derivative (Penawawa *6/ 'Wx2-2a') of the soft white spring wheat variety 'Penawawa'. Penawawa (PI 495916; 'Potam 70' / 'Fielder') was developed by Dr. Calvin Konzak while at Washington State University (WSU), Pullman, Washington, and was released in 1985 by WSU and the USDA. A tentative name assignment of 'Penawawa-X' was approved by the Seed Regulatory & Testing Branch, USDA-Agricultural Marketing Service in 2003, but was changed in to Waxy-Pen in 2006. Breeder seed of Waxy-Pen was derived by bulking seed from 27 BC5F3-derived F5 field plots grown near Bozeman, Montana in 2004. The kernels had a small portion of the distal brush end removed with a razor blade and the exposed endosperm was stained with iodine. Rust-colored, as opposed to dark purple color, was indicative of waxy starch. The waxy endosperm trait was confirmed on the BC5F5 seed. Waxy-Pen was evaluated in 2005 in the Washington State University Extension Uniform Cereal Variety Testing Program (WSU Ext. UCVTP) as 'WA7996', by John Burns, Extension Agronomist; and in the Western Regional Uniform Cooperative (WRN Coop) Wheat Nurseries, Dr. Kim Garland Campbell, ARS Research Geneticist, Coordinator, as 'WQL7PENWX-2'. In general, Waxy-Pen is morphologically and developmentally indistinguishable from Penawawa except for the waxy endosperm trait. Across 18 WSU Ext. UCVTP locations, Waxy-Pen had significantly lower grain yield slightly lower test weight and similar grain protein contents compared to Penawawa. Like Penawawa, Waxy-Pen is susceptible to the stripe rust (caused by Puccinia striiformis West. f. sp. tritici) race(s) currently prevalent in the Pacific Northwest. Due to intense stripe rust incidence in 2005, Waxy-Pen and Penawawa yielded from lows of 457 and 511 kg ha-1, respectively, up to 3736 and 3863 kg ha-1, respectively, across the 18 WSU Ext. UCVTP locations. In the WRN Coop Wheat Nurseries, grain yield of Waxy-Pen ranged from 1340 to 8528 kg ha-1 (data not shown). Due to the unique amylose-free composition of Waxy-Pen starch, several end-use quality traits are dramatically altered. Consequently, Waxy-Pen must be strictly segregated from other soft white wheat grain. Waxy-Pen received protection under U.S. Plant Variety Protection (PVP Certificate No. 200600005), and has been exclusively licensed to the Washington State University Research Foundation (WSU RF), 1610 N.E. Eastgate Blvd., Pullman, WA, 99163. Licensing or commercialization inquiries should be directed to the WSU RF; small quantities of seed for crossing, research and other non-commercialization activities are available upon written request from Dr. Craig F. Morris, Director, USDA-ARS Western Wheat Quality Laboratory, E-202 Food Sci. & Human Nutrition Facility East, P.O. Box 646394, Washington State University, Pullman, WA 99164-6394 or e-mail morrisc@wsu.edu. It is requested that appropriate recognition be made if this cultivar contributes to research or the development of germplasm or cultivars. Genetic material of this release has been deposited in the USDA National Plant Germplasm System (http://www.ars-grin.gov/npgs/) where it will be available after the expiry of the Plant Variety Protection for research purposes, including development and commercialization of new cultivars.

Last Modified: 8/30/2014
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