The Spring Wheat Nested Association Mapping (NAM) population based on 2100 recombinant inbred lines from 28 families was used to construct 588 chromosome-specific genetic maps. With each population reporting ~50,000 markers, this work contributes ~1,400,000 markers to the GrainGenes collection. Many of these markers were previously entered as probes / sequences for the IWA and IWB marker collection. GrainGenes curators will be working in the coming weeks to connect these markers and fill in the data for new markers.

The 2017 Uniform Regional Scab Nursery for Spring Wheat Parents Nursery report can be found at /GG3/germplasm.

The 2017 Uniform Regional Hard Red Spring Wheat Nursery report, as well as a separate African Stem Rust Nursery Results are uploaded and available at /GG3/germplasm.

Oatmail Mailing list is created at GrainGenes in collaboration with the Oat Newsletter and AAFC Canada to faciliate communication between oat geneticists and breeders.

Maps from Munoz-Amatriain M et al. (2014) The USDA Barley Core Collection: genetic diversity, population structure, and potential for genome-wide association studies. PLoS ONE 9:e94688 have been added to GrainGenes. These contain markers from the POPA collections that were not advanced to the BOPA sets as well as the BOPA1 and BOPA2 marker sets. To reconcile the rich history of marker naming for these SNPs, synonyms were created for all markers that link to all other forms of the marker name. Common probe links will enable all map sets utilizing these markers to correspond via CMap.

The GrainGenes node at WheatIS has added links to 120 Mapping Data records and 14,411 germplasm records for Triticum aestivum and its close relatives.

Mapping data records at GrainGenes are the hubs for mapping projects and contain metadata and links to the maps in the CMap tool.

Records at WheatIS are enriched with text from comments in GrainGenes, including parents of mapping populations, country of origin for germplasm and titles of the original publications; all completely searchable.

A map for the QTL containing the three-pistil gene (Pis1) recently published by Yang et al (2017) BMC Genomics 18:567, including 127 predicted protein-coding genes flanked by KASP markers has been added to GrainGenes. The Pis1 gene is expressed in the mutant line CM28TP originating from Chuanmai 28, directing the plant to produce three seeds where normal wheat produces one seed. The causative gene for this mutation has not been identified yet, but the QTL contains 10 loci that are candidate genes for this trait. This lays the groundwork for map-based cloning of the Pis1 Gene.

The high-density consensus map consists of both markers with known genetic map position and SNP markers placed on the linkage maps using minimum recombination frequency values. Two F2 Ae. umbellulata populations were used for linkage map construction. The first consisted of 140 F2 individuals that were derived from a cross made between two accessions of Ae. umbellulata: PI 298905, from Manisa, Turkey, and resistant to wheat stem rust pathogen P. graminis f. sp. tritici race TTTTF (isolate 01MN84A-1-2), and PI 542369, from Usak, Turkey, and susceptible to race TTTTF.

Wheat Information System (WheatIS) operating under the Wheat Initiative is a platform that provides a single-access site to wheat data distributed at different databases. GrainGenes created a WheatIS node, and made wheat QTL data searcahble through the WheatIS site at URGI: https://urgi.versailles.inra.fr/wheatis/#result/term=graingenes

Posted on: December 15, 2017