Home Publications & Data Journal Article A DNA marker for ppd, a gene conferring insensitivity to photoperiod in common bean author(s) Gu, WK published in1993 original file download full citation Gu, W.K.; Weeden, Norman; Wallace, D.H.; Singh, Shree P. 1993. A DNA marker for ppd, a gene conferring insensitivity to photoperiod in common bean. Bean Improvement Cooperative. Annual Report (USA). 36:1-2.