Table 1.

Origin of the M. officinalis germplasm accessions and commercial check cultivars.

Accession number	Source of seed	Latitude and Longitude
PI 552553	Nebraska, United States	41°29′N, 99°54′W
PI 552554	Nebraska, United States	Unknown
Ames 22891	Russia	44°28′N, 40°48′E
Ames 25658	Tien Shan Mountains, China	43°46′N, 89°27′E
PI 595394	Canada	56°07′N, 106°20′W
PI 634019	Saskatchewan, Canada	52°56′N, 106°27′W
Norgold	Nebraska, United States	Commercial cultivar
LX 03	Qinghai, China	Experimental cultivar