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Towards the Reliable Prediction of Time to Flowering in Six Annual Crops. IV. Cultivated and Wild Mung Bean

Published online by Cambridge University Press:  03 October 2008

R. H. Ellis ,
R. J. Lawn ,
R. J. Summerfield ,
A. Qi ,
E. H. Roberts ,
P. M. Chay ,
J. B. Brouwer ,
J. L. Rose ,
S. J. Yeates  and
S. Sandover
R. H. Ellis
Affiliation:
University of Reading, Department of Agriculture, Plant Environment Laboratory, Cutbush Lane, Shinfield, Reading RG2 9AD, England
R. J. Lawn
Affiliation:
CSIRO Division of Tropical Crops and Pastures, The Cunningham Laboratory, 306 Carmody Road, St. Lucia, Brisbane, Queensland 4067, Australia
R. J. Summerfield
Affiliation:
University of Reading, Department of Agriculture, Plant Environment Laboratory, Cutbush Lane, Shinfield, Reading RG2 9AD, England
A. Qi
Affiliation:
University of Reading, Department of Agriculture, Plant Environment Laboratory, Cutbush Lane, Shinfield, Reading RG2 9AD, England
E. H. Roberts
Affiliation:
University of Reading, Department of Agriculture, Plant Environment Laboratory, Cutbush Lane, Shinfield, Reading RG2 9AD, England
P. M. Chay
Affiliation:
CSIRO Davies Laboratory, Private Mail Bag, PO Aitkenvale, Townsville, Queensland 4814, Australia
J. B. Brouwer
Affiliation:
Victorian Institute for Dryland Agriculture, Private Bag 260, Horsham, Victoria 3401, Australia
J. L. Rose
Affiliation:
Queensland Department of Primary Industries, Hermitage Research Station, via Warwick, Queensland 4370, Australia
S. J. Yeates
Affiliation:
Department of Primary Industry and Fisheries, PO Box 1346, Katherine, Northern Territory 0851, Australia
S. Sandover
Affiliation:
Western Australia Department of Agriculture, PO Box 19, Kununurra Regional Office, Western Australia 6743
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Summary

Eight genotypes of cultivated mung bean, black gram and rice bean (Vigna mungo, Vigna radiata ssp. radiata and Vigna umbellata, respectively) were sown at six sites in Australia on various dates in order to provide a range of photothermal environments. In addition, four accessions of the related wild species Vigna radiata ssp. sublobata were sown on five occasions. Times from sowing to first flowering (f) varied between environments from 34 to 317 d; pre-flowering temperature and photoperiod means ranged from 12.7° to 29.1°C and from 11.8 to 15.5 h d−1. No effect of photoperiod was detected on rate of progress towards first flowering (1/f) in four genotypes, but in each case a significant positive relation was detected between 1/f and mean temperature. These simple thermal time relations did not differ significantly among these four genotypes; the common base temperature was 7.9°C. In two genotypes observations were well described by a thermal response plane when the mean photoperiod was less than 13 h d−1 (p < 0.01) but photoperiods greater than 14 h d−1 delayed flowering. In each of the remaining genotypes the observations were best described by photothermal planes, that is, 1/f was modulated by temperature and photoperiod. Predictions from the models based on our data were in good agreement with the times to first flowering observed in three genotypes in an earlier controlled environment study.

Type
Research Article
Information
Experimental Agriculture , Volume 30 , Issue 1 , January 1994 , pp. 31 - 43
Copyright
Copyright © Cambridge University Press 1994

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References

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