Acknowledgments:
This work is supported by the National Science Foundation EF-1442597 to KW, EF-1442486 to AE and Rice Rivers research scholarship to MM. We also acknowledge NSF Grant No.1126840, which funded the Southwest Experimental Garden Array used in this research. We thank the field crew for help setting up the common gardens and specifically Dr. Ethan Bucholz for his continued support and guidance through sampling design and common garden establishment. We also thank the computational resources available through the VCU HPC grid engine system.