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Modelling the effects of vernalization on progress to final leaf appearance in winter wheat

Published online by Cambridge University Press:  27 March 2009

J. Craigon ,
J. G. Atherton  and
N. Sweet
J. Craigon
Affiliation:
University of Nottingham, Faculty of Agricultural and Food Sciences, Sutton Bonington Campus, Loughborough LE12 5RD, UK
J. G. Atherton
Affiliation:
University of Nottingham, Faculty of Agricultural and Food Sciences, Sutton Bonington Campus, Loughborough LE12 5RD, UK
N. Sweet
Affiliation:
University of Nottingham, Faculty of Agricultural and Food Sciences, Sutton Bonington Campus, Loughborough LE12 5RD, UK
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Summary

A simple model of vernalization, originally developed to quantify the vernalization response of fieldgrown carrots, was fitted to previously published experimental results for winter wheat cv. Norin 27. The optimum temperature for vernalization indicated by the model was c. 5·2 °C, as this induced the fastest progress to final leaf appearance, expressed as the reciprocal of number of days from sowing to final leaf. This rate decreased linearly with temperature rise or fall on either side of the optimum, extrapolating to zero at –4·8 °C (Tmin) and 26·6 °C (Tmax). When all the treatment temperatures and durations were expressed as vernalizing degree days > –4·8 °C (V °C d), there was a linear increase in post-treatment development rate with increasing vernalization up to c. 275 V °C d. Ending the effective treatment duration for vernalization at the estimated time of initiation of the final leaf primordia brought many of the data points closer to the linear trend which described the rest of the data.

Effects of using leaf number, which is linearly related to thermal time, instead of days as the unit of time to compensate for temperature differences in the original experiment were examined. Unvernalized plants had the potential to produce 18 leaves before flowering and therefore rates were expressed as the fraction of the potential total leaf number that each new leaf represented. All plants were assumed to have an initial development rate of 1/18 per leaf. This rate was assumed to increase linearly with time during the vernalizing treatment periods and then remain constant after treatment until the final leaf appeared. Leaf numbers reported from the original experiment were used with these assumptions to estimate the rate at the end of each treatment. The relationship between these rates and treatment temperatures was similar to that for rates based on post-treatment durations. There was an optimum temperature c. 5·5 °C and Tmin and Tmax of –5·1 and 18·8 °C estimated by extrapolating the decreasing linear trends to the base rate of 1/18. When plotted against V °C d calculated from these temperatures, the rates from the full data set were well represented by the model line which had been fitted to the data from just one treatment duration.

Type
Crops and Soils
Information
The Journal of Agricultural Science , Volume 124 , Issue 3 , June 1995 , pp. 369 - 377
Copyright
Copyright © Cambridge University Press 1995

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References

Atherton, J. G., Craigon, J. & Basher, E. A. (1990). Flowering and bolting in carrot. I. Juvenility, cardinal temperatures and thermal times for vernalization. Journal of Horticultural Science 65, 423–429.Google Scholar
Baker, C. K., Gallagher, J. N. & Monteith, J. L. (1980). Daylength change and leaf appearance in winter wheat. Plant, Cell and Environment 3, 285–287.Google Scholar
Cao, W. & Moss, D. N. (1991). Vernalization and phyllochron in winter wheat. Agronomy Journal 83, 178–179.Google Scholar
Chujo, H. (1966). Difference in vernalization effect in wheat under various temperatures. Proceedings of the Crop Science Society of Japan 35, 177–186.Google Scholar
Craigon, J., Atherton, J. G. & Basher, E. A. (1990). Flowering and bolting in carrot. II. Prediction in growth room, glasshouse and field environments. Journal of Horticultural Science 65, 547–554.Google Scholar
Ellis, R. H., Summerfield, R. J. & Roberts, E. H. (1988). Effects of temperature, photoperiod and seed vernalization on flowering in faba bean Viciafaba. Annals of Botany 61, 17–27.Google Scholar
Hay, R. K. M. & DelÉecolle, R. (1989). The setting of rates of development of wheat plants at crop emergence: Influence of the environment on rates of leaf appearance. Annals of Applied Biology 115, 333–341.Google Scholar
Hoogendoorn, J. (1984). A comparison of different vernalization techniques in wheat (Triticum aestivum L.). Journal of Plant Physiology 116, 11–20.CrossRefGoogle ScholarPubMed
Hoogendoorn, J. (1985). The basis of variation in date of ear emergence under field conditions among the progeny of a cross between two winter wheat varieties. Journal of Agricultural Science, Cambridge 104, 493–500.Google Scholar
Johnstone, J. V., Jamieson, P. D. & Wilson, D. R. (1990). Vernalization requirements of contrasting wheat genotypes. In Proceedings of the Fifth Australian Agronomy Conference, Perth, p. 634.Google Scholar
Kirby, E. J. M. (1990). Co-ordination of leaf emergence and leaf and spikelet primordium initiation in wheat. Field Crops Research 25, 253–264.Google Scholar
Kirby, E. J. M. (1992). A field study of the number of main shoot leaves in wheat in relation to vernalization and photoperiod. Journal of Agricultural Science, Cambridge 118, 271–278.Google Scholar
Lumsden, M. E. (1980). The influence of weather on the development of winter wheat. BSc thesis, University of Bath.Google Scholar
Reinink, K., Jorritsma, I. & Darwinkel, A. (1986). Adaptation of the AFRC wheat phenology model for Dutch conditions. Netherlands Journal of Agricultural Science 34, 1–13.Google Scholar
Roberts, E. H., Summerfield, R. J., Cooper, J. P. & Ellis, R. H. (1988). Environmental control of flowering in barley (Hordeum vulgare L.). I. Photoperiod limits to long-day responses, photoperiod-insensitive phases and effects of low-temperature and short-day vernalization. Annals of Botany 62, 127–144.Google Scholar
Travis, K. Z., Day, W. & Porter, J. R. (1988). Modelling the timing of the early development of winter wheat. Agricultural and Forest Meteorology 44, 67–79.Google Scholar
Trione, E. J. & Metzger, R. J. (1970). Wheat and barley vernalization in a precise temperature gradient. Crop Science 10, 390–392.CrossRefGoogle Scholar
Wall, P. C. & Cartwright, P. M. (1974). Effects of photoperiod, temperature and vernalization on the phenology and spikelet numbers of spring wheats. Annals of Applied Biology 76, 299–309.Google Scholar
Weir, A. H., Bragg, P. L., Porter, J. R. & Rayner, J. H. (1984). A winter wheat crop simulation model without water or nutrient limitations. Journal of Agricultural Science, Cambridge 102, 371–382.CrossRefGoogle Scholar