Registration of the wheat D-genome nested association mapping (DNAM) population

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.

Automated summary

The DNAM population was developed to increase diversity in the D genome of hexaploid wheat and consists of 1,164 BC2F4 recombinant inbred lines from direct crosses between a Kansas State University breeding line and Aegilops tauschii accessions. Originally focused on introgressing novel stem rust resistance genes, it has since been utilized to identify resistance to other fungal pathogens, with a subset of lines selected for important agronomic traits and named the DNAM Core RILs. Research with the DNAM has the potential to provide novel genes for introgression into elite cultivars and deepen understanding of the wheat D genome.