Journal Article durum wheat varietal mixtures Agroecology Competition Research Support, Non-U.S. Gov't Septoria tritici blotch agronomic trait allelic richness arms race competitive hierarchy crop crop domestication diversity domestication functional traits genome-wide analysis high-throughput root phenotyping niche complementarity phenotypic space plant functional trait plant-plant interactions relative yield root projected area root traits tragedy of the commons trait plasticity trait-to-performance mapping wheat