Registration of Castella soft white winter club wheat

Authors: Garland-Campbell, Kimberly; CARTER, ARRON - Washington State University; ALLAN, ROBERT - Washington State University; Chen, Xianming; Steber, Camille; DEMACON, PATRICIA - Washington State University; ESSER, AARON - Washington State University; HIGGINBOTHAM, RYAN - Highline Grain Growers, Inc; ENGLE, DOUGLAS - Washington State University; KLARQUIST, EMILY - Washington State University; Morris, Craig; MUNDT, CHRISTOPHER - Oregon State University; MURRAY, TIMOTHY - Washington State University; See, Deven; WEN, NUAN - Washington State University

Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 1/10/2021
Publication Date: 8/6/2021
Publication URL: https://handle.nal.usda.gov/10113/7709479
Citation: Garland Campbell, K.A., Carter, A.H., Allan, R., Chen, X., Steber, C.M., DeMacon, P., Esser, A., Higginbotham, R., Engle, D., Klarquist, E., Morris, C.F., Mundt, C., Murray, T., See, D.R., Wen, N. 2021. Registration of Castella soft white winter club wheat. Journal of Plant Registrations. 15(3):504-514. https://doi.org/10.1002/plr2.20132.
DOI: https://doi.org/10.1002/plr2.20132

Interpretive Summary: The club wheat crop is a small but significant part of the soft white wheat crop in the Pacific Northwest with most of the harvested grain exported to Japan. Commonly grown cultivars, Bruehl and Pritchett suffer from low falling number which negatively impacts the quality of the crop. The other major club wheat cultivar, ARS Crescent, does not have excellent stripe rust resistance. Castella soft white club wheat combines resistance to falling numbers with competitive grain yield. Castella also has excellent resistance to stripe rust in the field and excellent grain end use characteristics. Castella will increase the quality of the club wheat crop in the Pacific Northwest.

Technical Abstract: Soft white club winter wheat (Triticum aestivum L. spp. compactum) is a specialty class of soft white wheat prized for its end use quality. Our goal was to develop a broadly adapted club wheat cultivar targeted to the Pacific Northwest with resistance to stripe rust and low falling numbers, plus competitive agronomic and end use quality characteristics. Castella, a tall, semi-dwarf, awnless, white-kernel club wheat, was selected using the bulk-pedigree breeding method, from the diverse cross: NY89-66-7131/B980696//"Chukar'. In multiple years of testing in greenhouse and field trials, Castella exhibited resistance to stripe rust (Puccinia striiformis Westend f. sp. tritici Erikks.). In the seedling stage, Castella is resistant to the most virulent isolate, PSTv-51, and to PSTv40, but susceptible to races PSTv-4, PSTv-14 and PSTv-37. In the adult-plant stage Castella is highly resistant to PSTv37 and PSTv-40, but susceptible to PSTv-14. In low rainfall environments (< 350mm of annual precipitation) the grain yields of Castella were significantly greater than other club wheat cultivars, ARS Cresscent, Bruehl, Coda, Pritchett and Cara; and equivalent to soft white wheat checks. In high rainfall environments (> 350mm) the grain yields of Castella were significantly greater than Cara but less that ARS Crescent. Castella had better test weight that ARS Crescent and Pritchett and excellent milling and baking properties. Castella has maintained falling number above 300 more frequently than Bruehl and Pritchett over multiple testing years. Castella will increase the quality of the club wheat crop in the Pacific Northwest.