Main Content:
The grain protein content (GPC) is the key parameter for wheat grain nutrients. This
study conducted a resampling GWAS analysis using 406 wheat accessions across eight
environments, and identified four reported GPC QTLs.
Analysis of 87 landraces and 259 modern
cultivars revealed the loss of superior GPC haplotypes, especially in Chinese cultivars. These
haplotypes were preferentially adopted in different agroecological zones and had broad effects on
wheat yield and agronomic traits.
Most GPC QTLs did not significantly reduce yield, suggesting high
GPC can be achieved without yield penalty. This data provides a reference for future wheat GPC
breeding using the four identified QTLs.