Description of U6719‐004 wheat germplasm with <i>YrAS2388R</i> stripe rust resistance introgression from <i>Aegilops tauschii</i>

In recent years, stripe rust has become an increasingly problematic disease affecting wheat (Triticum aestivum L.). Although resistance genes Yr28 and YrAS2388R have been successfully transferred from Aegilops tauschii Coss. to hexaploid wheat, these not widely used for breeding largely due a lack of publicly available well-adapted germplasm. Here we describe U6719-004 (Entry 538 D-genome nested association mapping population, Reg. No. MP-14, NSL 536301 MAP), germplasm carrying derived Ae. accession TA1718 that is well adapted U.S. production environments. (KS05HW14-3/3/KS05HW14-3/TA1718//KS05HW14-3) was developed using combination direct hybridization with the hard white winter line KS05HW14-3 followed by two rounds backcrossing three generations single seed descent. characterized under controlled natural conditions. Using gene-based markers, were confirmed be carriers. Grain yield evaluated in 11 year-by-location environments across United States. quality parameters measured four Compared recurrent parent locally check cultivars, introgression had little no impact on grain or quality. The availability will enable use efforts.