Registration of 'Sockeye CL+' Soft White Winter Wheat

Authors: CARTER, ARRON - WASHINGTON STATE UNIVERSITY; BALOW, KERRY - WASHINGTON STATE UNIVERSITY; SHELTON, GARY - WASHINGTON STATE UNIVERSITY; BURKE, ADRIENNE - WASHINGTON STATE UNIVERSITY; HAGEMEYER, KYALL - WASHINGTON STATE UNIVERSITY; STOWE, A - WASHINGTON STATE UNIVERSITY; WETZEL, H - WASHINGTON STATE UNIVERSITY; WORAPONG, J - UNIVERSITY OF IDAHO; NEELY, CLARK - WASHINGTON STATE UNIVERSITY; STEBER, CAMILLE; CHEN, XIANMING; KISZONAS, ALECIA

Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 3/20/2025
Publication Date: N/A
Citation: N/A

Interpretive Summary: Soft white winter wheat is the main market class produced in Washington State. With consistent production of winter wheat, winter annual weeds have been a constant concern of producers. For over 20 years, growers have utilized the Clearfield Production System to control grassy weeds in commercial production. The persistent use of group 2 Beyond herbicide tolerant wheat has resulted in many fields with residual herbicide contamination, which can be a serious problem for following crops of Beyond sensitive or one-gene Beyond tolerant varieties. The objective of this research was to develop a two-gene Beyond tolerant soft white winter wheat variety that could be used in the Clearfield Production System. In this study, we developed a soft white winter wheat, named 'Sockeye CL+', with two-gene Beyond tolerance. It has improved resistance to stripe rust, tolerance to snow mold, improved end-use quality, and maintains high grain yield across production regions as compared to other commercially available herbicide tolerant cultivars. The variety was released in March 2020 by the Agricultural Research Center of Washington State University as it is broadly adapted across the wheat production regions of Washington. Socheye CL+ is a semi-dwarf variety; has intermediate plant height with mid-season maturity and high grain volume weight. It has maintained high grain yield across multiple years and locations of testing in Washington. Its end-use quality properties exceed both domestic and export market standards.

Technical Abstract: Soft white winter (SWW) wheat (Triticum aestivum L.) is the main market class produced in Washington State. With consistent production of winter wheat, winter annual weeds have been a constant concern of producers. For over 20 years, growers have utilized the Clearfield® Production System to control grassy weeds in commercial production. The persistent use of group 2 (Amino Acid Inhibitors/ALS) Beyond® herbicide (imazamox) tolerant wheat has resulted in many soils with residual herbicide contamination. The objective of this research was to develop a two-gene Beyond® tolerant SWW cultivar that could be used in the Clearfield® Production System. ‘Sockeye CL+’ has improved resistance to the stripe rust pathogen (caused by Puccinia striiformis Westend. f. sp. tritici Erikss.), tolerance to snow mold, improved end-use quality, and maintains high grain yield across production regions as compared to other commercially available herbicide tolerant cultivars. Sockeye CL+ (Reg. No. CV-xxxx, PI xxxxxx) is a SWW wheat cultivars developed and released in March 2020 by the Agricultural Research Center of Washington State University. Sockeye CL+ was tested under the experimental designations MAS11295-1-1-0-4 and WA8306 CL+, assigned through progressive generations of advancement. This cultivar is a two-gene Beyond® tolerant semi-dwarf cultivar broadly adapted across the wheat production regions of Washington. Sockeye CL+ has improved high-temperature adult-plant resistance to the stripe rust pathogen over the most commonly grown Clearfield® cultivars, is tolerant to snow mold, has intermediate plant height with mid-season maturity, and has high grain volume weight. This line has maintained high grain yield across multiple years and locations of testing in Washington. The end-use quality properties of Sockeye CL+ exceed both domestic and export market standards.