Photoperiod or daylength affects a diverse set of traits in plants, including flowering and tuberization in annuals, as well as growth cessation and bud set in perennials. During the last 10-15 years, great progress has been made in the understanding of molecular mechanisms controlling photoperiodic induction of flowering, in particular in the model species Arabidopsis thaliana. An obvious ques...

FPA is a gene that regulates flowering time in Arabidopsis via a pathway that is independent of daylength (the autonomous pathway). Mutations in FPA result in extremely delayed flowering. FPA was identified by means of positional cloning. The predicted FPA protein contains three RNA recognition motifs in the N-terminal region. FPA is expressed most strongly in developing tissues, similar to the...

Abstract Exposing Holstein dry cows to short-day (SD) photoperiod of 8 hours per day can improve milk production post-calving by 3.2 kg day, compared exposed long-day (LD) 16 during the same period. To date, no studies have evaluated effect altered period on in Jersey cows. Our objective was study LD and SD both breeds. (n=33) dried off 60 days prior their due date were either (n=9 Holstein, n=...