Registration of ‘Piranha CL+’ soft white winter wheat

Abstract

Soft white winter (SWW) wheat (Triticum aestivum L.) is commonly grown in Washington. In many production areas of the state, winter annual weeds have become prevalent in the fields. With only a few herbicide choices available, growers have used the Clearfield Production System technology as a tool to control grassy weeds. The use of the group 2 (amino acid/acetolactate synthase inhibitors) Beyond herbicide (imazamox) tolerant wheat has allowed growers effective weed control options but has also led to herbicide residual building up in the soil profile. The objective of this research was to develop a two-gene, Beyond-tolerant SWW cultivar with 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 can maintain high grain yield across production regions and years. ‘Piranha CL+’ (Reg. no. CV-1214, PI 699241) is a SWW wheat cultivar developed and released in March 2020 by the Agricultural Research Center of Washington State University. Piranha CL+ was tested under the experimental designations MAS11295-1-1-0-2 and WA8305 CL+, assigned through progressive generations of advancement. Piranha CL+ is a two-gene Beyond tolerant semi-dwarf cultivar broadly adapted across the wheat production regions of Washington. Piranha 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 cultivar has maintained high grain yield across multiple years of testing in Washington. The end-use quality properties of Piranha CL+ meet expectations of both domestic and export market standards.