Niacin: meat, wheat, mushrooms.
A Japanese tradition likens this tough endurance and core strength to wheat: wheat sprouts in cold, harsh winters, is trampled on, but with deep roots in the ground resists cold and wind and grows straight into productive and beautiful plants.
Recently, a candidate wheat core collection (5,029 accessions) was established based on geographical regions, ecotypes, and 21 agronomic and botanic characters of the basic collections [3].
This was consistent with a previous study analyzing 1,160 a Chinese wheat core collection composed of 762 landraces and 348 modern varieties using 78 microsatellite markers [6].
aestivum accessions available in the spring wheat core collection assembled by the USDA-ARS Small Grains and Potato Germplasm Research Unit.
In this study, we evaluated 1000 accessions from the US Department of Agriculture Agricultural Research Service USDA-ARSS) NSGConal springGrains Collection (NSGC) spring wheat core collection for resistance against Pst.
In addition, the genetic characterization of these accessions organized the spring wheat core collection into seven subpopulations of genetically related accessions.
The elimination of the near-identical lines from the NSGC spring wheat core collection can reduce the size of the collection without a significant loss of genetic diversity.
The population structure of 1000 accessions from the spring wheat core collection was used as covariate in the GWAS mainly to reduce the number of false associations (Yu et al. 2006), but it also provided additional valuable information.
It is important to point out that the proportions of subgroups presented in Figure 1 and in the clusters in Figure 2, represent the proportions of accessions in the NSGC spring wheat core collection, but may not necessarily represent the current composition of cultivars in a specific country or group.
