Abstract
The flowering behavior of 59 Pisum mutants and 228 recombinants was studied in the phytotron in four different photoperiods (continuous light, long-day 18/6 h, short-day 12/12 h, extreme short-day 6/18 h). There was no or little difference in the response of the genotypes to long-day and permanent light, whereas great differences were observed between long- and short-day 12/12 h and between the two short-day trials. About half the genotypes tested were unable to survive or to flower in extreme short-day. Some recombinants, however, had an almost normal development under these unfavorable conditions. Gene fis controls the photoperiodic reaction of the plants: they are unable to flower in short-day. Gene fds negatively influences gene efr for earliness: it causes a strong delay of flowering of efr recombinants in long-day and suppresses the formation of functionable flowers in short-day. Most of the genotypes tested showed a specific reaction to the four photoperiods different from that of the mother variety and the other genotypes. The practical aim of our phytotron experiments is the preselection of Pisum genotypes which might be suited for cultivation in countries with short-day climate.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call