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Annals of Botany 80: 505-513, 1997
© 1997 Annals of Botany Company

Rates of Progress towards Flowering and Podding in Bambara Groundnut (Vigna subterranea) as a Function of Temperature and Photoperiod

MARTIN BRINK+,

Department of Agronomy, Wageningen Agricultural University, P.O. Box 341, 6700, AH, Wageningen, The Netherlands

Received May 9, 1996 ; Accepted June 20, 1997 .

The influence of temperature and photoperiod on phenological development of three bambara groundnut (Vigna subterranea) selections from Botswana, Zimbabwe and Mali was investigated in a semi-controlled environment experiment with factorial combinations of three constant temperatures (20.9, 23.4 and 26.2 °C) and four constant photoperiods (10.0, 12.5, 13.5 and 16.0 h d-1). In all three selections, the onset of flowering was influenced by temperature but not by photoperiod, while the onset of pod-growth (‘podding’) of all three selections was influenced by both factors. The influence of temperature and photoperiod was quantified by means of photothermal models, linking development rates to temperature and photoperiod with linear equations. The rate of progress from sowing to flowering of the three selections could be described very well (r2>95%) as a function of temperature; the rate of progress from flowering to podding was described reasonably well as a function of both temperature and photoperiod by a combination of one to three response planes (r2for the different selections ranging from 63 to 90%). Model testing with independent data sets showed good agreement between observed and predicted times to flowering and podding.

Vigna subterranea; Voandzeia subterranea; bambara groundnut; phenology; development; flowering; podding; photoperiod; temperature; modelling


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F. J. Massawe, S. N. Azam-Ali, and J. A. Roberts
The Impact of Temperature on Leaf Appearance in Bambara Groundnut Landraces
Crop Sci., July 1, 2003; 43(4): 1375 - 1379.
[Abstract] [Full Text] [PDF]


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