Modern wheat is lacking diversity in the D genome due to the genetic bottleneck from the hybridization between tetraploid Triticum turgidum L. and diploid Aegilops tauschii Coss. The D‐genome nested association mapping (DNAM) population (Reg. no. MP‐14, NSL 536301 MAP) was developed to expand D‐genome variation in hexaploid wheat (Triticum aestivum L.). The DNAM population is a wheat nested association mapping population developed with direct crosses between the hard‐white winter Kansas State University breeding line KS05HW14‐3 and Ae. tauschii accessions TA10187, TA1693, TA10171, TA1662, TA1617, TA1615, TA1642, and TA1718. In total, there are 1,164 BC₂F₄ recombinant inbred lines (RILs) in 19 families. The DNAM was originally created for introgression of novel stem rust resistance genes but has since been used to identify resistance to other fungal pathogens. A subset of 420 lines were selected for important agronomic traits, including height and threshability, and named the DNAM Core RILs. Research with the DNAM has potential to provide novel genes that can be introgressed into elite cultivars, as well as knowledge and understanding of the D genome in wheat.

Soft white club wheat (Triticum aestivum ssp. compactum) is a unique component of wheat production in the Paciic Northwest, comprising 10 to 12% of the wheat crop. It is valued for milling and baking functionality and marketed for export in a 10 to 30% blend with soft white wheat known as western white. Our goal was to develop a club wheat cultivar for the traditional club wheat-growing region of central Washington, with better soilborne disease resistance than currently grown cultivars. The bulk pedigree breeding method was used to select Pritchett (Reg. No. CV-1123, PI 678944) from the cross: 'Chukar'/2*'Bruehl'. Pritchett has signiicantly better grain yield and grain volume weight in environments receiving less than 30 cm annual precipitation than Bruehl, the cultivar that it is targeted to replace. Pritchett has better milling quality, producing larger diameter cookies and greater volume sponge cake. Pritchett has efective adult plant resistance to stripe rust, has moderate resistance to Cephalosporium stripe, and carries the Pch1 gene for moderate resistance to eyespot. Pritchett carries the Rht-B1b allele for reduced plant height but has excellent emergence from deep sowing. Pritchett was released because of its superior agronomic productivity in the targeted region, combined with resistance to multiple diseases and superior end use quality.

Soft white club winter wheat (Triticum aestivum L. ssp. compactum) represents 8-10% of the wheat crop in Washington, but most of the current club wheat production is located in the <350-mm annual precipitation zone. Our goal was to develop a club wheat cultivar targeted to the >350-mm annual precipitation zones of the Pacific Northwest. 'ARS Crescent' (Reg. no. CV-1181, PI 665048), an awned white-kernel club wheat, was selected using the bulk-pedigree breeding method from the cross 'Dusty'//'Madsen' sib/Dusty///WA7665/'Rulo'. At the time of release, ARS Crescent was rated as resistant to stripe rust races PSTv-4 and PSTv-51, segregating for resistance to race PSTv-37, and susceptible to races PSTv-14 and PSTv-40 in the seedling stage. In the adult-plant stage in the field, ARS Crescent has demonstrated hightemperature adult plant resistance to stripe rust. Several years after release, the grain yields of ARS Crescent are equivalent to the club wheat 'Bruehl' and to soft white wheat checks for all growing regions. ARS Crescent combines better test weight than Bruehl with better resistance to environmental conditions that result in low falling numbers in wheat. ARS Crescent has excellent milling properties and greater sponge cake volume than other club wheat cultivars and increases the quality of the crop in Washington.

Soft white winter club wheat (Triticum aestivum L. ssp. compactum) is a specialty class of soft wheat prized for its end-use quality. Our goal was to develop a broadly adapted club wheat cultivar targeted to the U.S. Pacific Northwest (PNW) with competitive agronomic and end-use quality characteristics. 'Castella' (Reg no. CV-1185, PI 695319), a tall semi-dwarf awnless white-kernel club wheat, was selected using the bulk-pedigree breeding method, from the cross NY89-66-7131//B980696//'Chukar'. In the seedling stage, Castella is resistant to PSTv-51 and PSTv-40 but susceptible to races PSTv-4, PSTv-14, and PSTv-37 of the stripe rust pathogen. Castella exhibited excellent adult-plant resistance to the pathogen in multiyear trials. Castella is resistant to toxic levels of aluminum and to the biotype of Hessian fly (Mayetiola destructor Say) that is prevalent in the PNW. Across 72 environments, Castella exhibited competitive grain yields compared with existing club and soft white cultivars and higher grain volume weight than the club wheat check 'Bruehl'. Castella has maintained a falling number above 300 s more frequently than Bruehl and the club wheat 'Pritchett' in multiple testing years. Castella has excellent milling and baking properties including superior sponge cake volume and will increase the quality of the club wheat crop in the PNW.

Soft white club winter wheat (Triticum aestivum L. ssp. compactum) is an important component of soft white wheat production in the Pacific Northwest of the United States. Most of the current club wheat production is in the <350 mm annual precipitation zone in central Washington, but there is interest in club wheat in the Palouse region of the United States (the counties of Whitman and Garfield in Washington and in Latah County in Idaho). Growers are continuing to grow the older club wheat cultivars ‘Cara’ and ‘Coda’, and there is a need for a new winter club wheat targeted to this region. ‘Cameo’ club wheat (Reg. no. CV‐1192, PI 699960), tested as ARS09X492‐6CBW, with awned spikes and soft white kernels, was developed using the bulk‐pedigree breeding method from the cross ARSC96059‐2/IL01‐11934//ARSC96059‐2‐0‐16. Cameo has better agronomic performance than other club wheat cultivars in trials on the Palouse, better stripe rust resistance than the club wheat ‘ARS Crescent’, tolerance to several major biotic and abiotic stressors, consistent good grain volume weight, mid‐season maturity and moderate height, excellent club wheat quality, and tolerance to low falling numbers. Cameo is not as competitive for grain yield in the traditional club wheat growing area in central Washington but is well suited to increasing the acreage of club wheat in the Palouse region of Idaho and Washington.