At the Asian Vegetable Research and Development Center (AVRDC) one of the objectives of our soybean program is to identify photoperiod insensitivity (PI) in the germplasm and to develop high-yielding, widely-adapted types using PI. Photoperiod insensitivity has been reported in soybean by Yoshida (1952), Pohjakallio and Antila (1957), Criswell and Hume (1972), and Shanmugasundaram et al. (1974). However, due to unavailability of a suitable practical technique to screen the F2 and backcross individuals , the inheritance of PI could not be studied accurately.
"Research Notes: Inheritance of photoperiod insensitivity to flowering in
Soybean Genetics Newsletter: Vol. 4
, Article 6.
Available at: http://lib.dr.iastate.edu/soybeangenetics/vol4/iss1/6