%0 Journal Article
%A Carberry, P S
%A Ranganathan, R
%A Reddy, L J
%A Chauhan, Y S
%A Robertson, M J
%D 2001
%F icrisat:1772
%I Elsevier
%J Field Crops Research
%N 2
%P 151-162
%T Predicting growth and development of pigeonpea: flowering response to photoperiod
%U http://oar.icrisat.org/1772/
%V 69
%X Data from sowing-date and other experiments conducted for nine cultivars at three locations ranging from 18300S to 278150N were analysed for photoperiod response. All cultivars were found to have a qualitative response to photoperiod. The results of the analysis show that cultivars previously reported to be "relatively insensitive" to photoperiod were, in fact, highly sensitive. Flowering in short-duration cultivars was delayed by up to a 100 days when daylength in the photoperiod-inductive phase exceeded a critical value. Medium- and long-duration cultivars delayed flowering by over 150 days in response to photoperiod. A model was able to predict this wide range in flowering dates.