Responses to photoperiod change with phenophase and temperature during wheat development

This paper describes responses of four wheat genotypes to photoperiod in terms of several numerical parameters and examines how they are changed by temperature and stage of development. The cultivars are an awned selection of Sunset, Condor, Rosella and Cappelle Desprez. The three phenological phases were to double ridge (Phase I), from then to terminal spikelet (Phase II) and from then to heading (Phase III). Photoperiod regimes included a 9-h...