1. Department of Agronomy and Plant Breeding, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil 56199-11367, Iran
2. Sugar Beet Research Department, Kermanshah Agricultural and Natural Resources Research and Education Center, Education and Extension Organization (AREEO), Kermanshah 14968-13111, Iran
3. Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, USA