Resistant breeding lines for leafminer, corky root and downy mildew in lettuce
Lettuce breeding lines in the field: (A, upper left): USDA-07838 (red leaf); (B, upper right): USDA-09456 (green leaf); (C, middle left): USDA-09512 (green leaf); (D, middle right): USDA-14489 (romaine); and…