Temperature and Photoperiod Influence Reproductive Development of Reduced-photoperiod-sensitive Mungbean Genotypes
Open Access
- 1 March 1989
- journal article
- Published by American Society for Horticultural Science in Journal of the American Society for Horticultural Science
- Vol. 114 (2) , 204-209
- https://doi.org/10.21273/jashs.114.2.204
Abstract
Using the 9th and 10th International Mungbean Nursery (IMN) data, quadratic response surface models were developed to predict days to flowering (DF) of mungbean [Vigna radiata (L.) Wilczek] genotypes grown at 11-hr and 30 min and 13-hr and 30-min preflowering mean photoperiod ( P ) and 22 to 30C mean diurnal temperature ( T ) regimes. Both linear and quadratic effects were significant on DF and on the rate of progress towards flowering (1/DF); however, only the linear effect was significant in days to maturity (DM). The effect of T was more pronounced than that of P on DF of reduced-photoperiod-sensitive (RPS) genotypes. The earliest DF (flowering tendency) was estimated at 34 days after planting at the optimum mean diurnal temperature ( T 0) of 28C and the optimum mean photoperiod ( P 0) of 12 hr. At the suboptimal temperature ( T < T 0), the estimates of the base temperature Tb and the thermal time θr were 10C and 555 degree-days, respectively. Thus, flowering dates of these RPS mungbean lines can be predicted, which in turn will assist in the selection of proper planting dates.Keywords
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