Abstract
Dormancy of wheat grains, the property conferring sprouting resistance, is affected by environmental conditions experienced during grain development. We investigated the hypothesis that short dormancy duration in U.K. wheat grain (thus a high risk of post-maturity sprouting) is related to weather conditions, i.e. high temperatures during grain development. Four wheat varieties were grown at four sites ranging from the far south to the far north of the country in the years 1995–1997,ensuring different temperature and rainfall conditions during grain development. This paper focuses on one variety, Hornet, which has a high sprouting resistance rating. Other varieties gave similar results. Serial laboratory germination tests (seven days, 20°C) at 100°C-dayintervals were used to measure dormancy duration, which was assessed from logistic curves fitted to the data. During the experiment the mean temperatures during grain development differed by over4°C, due to the site × year effect. Significant effects (p>0.05) of site and year (i.e. weather) on dormancy were found, when definitions of dormancy duration of DA (number of days from anthesis to 50% germination in seven days at 20°C) or DP (number of days from physiological maturity at 45% grain moisture to 50% germination) were used. Dormancy was markedly shorter in the hot, dry year 1995 compared to the cooler, wetter years 1996 and 1997. A relationship, as postulated by Belderok, between accumulated temperature during the dough stage of grain filling and dormancy duration was not found. However, a relationship of dormancy duration to the mean temperature during grain development was found, with short dormancy periods occurring after high mean temperatures were experienced.
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References
Anonymous, 1990. Recommended list of cereal varieties, 1990. National Institute of Agricultural Botany, Cambridge, UK.
Beaux, Y. & F. Labonne, 1990. La germination sur pied des semences de céréales. Bulletin Semences, FNAMS 111: 61–64.
Belderok, B., 1961. Studies on dormancy in wheat. Proc Int Seed Test Assoc 26: 297–313.
Belderok, B., 1968. Seed dormancy problems in cereals. Field Crop Abstr 21: 203–211.
Belderok, B., 1973. La germination sur pied. Quel sont les facteurs déterminants de la germination précoce du blé? Bulletin ENSMIC 257: 211–217.
Derera, N.F., 1987. An audit of sprouting. Cereal Res Commun 8: 15–22.
Flintham, J.E. & M.D. Gale, 1988. Genetics of pre-harvest sprouting and associated traits in wheat: Review. Plant Var Seeds 1: 87–97.
Gosling, P.G., R.A. Butler, M. Black & J. Chapman, 1981. The onset of germinability of wheat. J Exp Bot 32: 621–627.
Grahl, A. & M. Schrödter, 1975. Wittering var der Reife und Keinrühe von Weizen unter besonder Beruchsich-tigung der Auswuchsvarhersage, Seed Sci Technol 3: 815–826.
Hagberg, S., 1960. A rapid method for determining alpha-amylase activity. Cereal Chem 37: 218–222.
Kettlewell, P.S, 1993. Pre-harvest prediction of Hagberg falling number Asp. Appl Biol 36: 257–266.
King, R.W., 1993. Manipulation of grain dormancy in wheat. J Exp Bot 44: 1059–1066.
Lallukka, U., 1976. The effect of the temperatures during the period prior to ripening on sprouting in the ear in rye and wheat varieties grown in Finland. Cereal Res Commun 4: 139–146.
Lane, P.W. & R.W. Payne, 1996. Genstat for windows: an introductory course. Oxford: Numerical Algorithms Group Limited.
Lunn, G.D., P.S. Kettlewell, B.J. Major & R.K. Scott, 1998a. Physiological control of Hagberg falling number and sprouting in winter wheat and development of a prediction scheme. Project report No. 165, Home-Grown Cereals Authority, London.
Lunn, G.D., P.S. Kettlewell, B.J. Major & R.K. Scott, 1998b. Evaluation of the Belderok temperature-dormancy relationship in the U.K. Proceedings of the Eighth International Symposium on Preharvest Sprouting in Cereals. Federal Centre for Cereal, Potato and Lipid Research, Detmold, Germany. pp. 190–198.
Lunn, G.D., P.S. Kettlewell, B.J. Major & R.K. Scott, 2001a. Mechanisms leading to excess alpha-amylase activity in wheat (Triticum aestivum, L.) grain in the UK. J Cer Sci 33: 313–329.
Lunn, G.D., P.S. Kettlewell, B.J. Major & R.K. Scott, 2001b. Effects of pericarp alpha-amylase activity on wheat (Triticum aestivum, L.) Hagberg falling number. Ann Appl Bol 138: 207–214.
MacKey, J., 1989. Seed dormancy in wild and weedy relatives of cereals. Chapter 2 in 'Preharvest Field Sprouting in Cereals', ed. D.F. Derera, CRC Press, USA, pp. 15–25.
Nielsen, M.T., A.J. McCrate, E.G. Heyne, & G.M. Paulsen, 1984. Effect of weather variables on preharvest sprouting of hard white winter wheat. Crop Sci 24: 779–782.
Olsson, G. & Mattison, B., 1976. Seed dormancy in wheat under different weather conditions. Cer Res Commun 4: 181–185.
Strand, E., 1989. Studies on seed dormancy in small grain species II. Wheat. Norw J Agric Sci 3: 101–115.
Tottman, D.R. & H. Broad, 1987. The decimal code for growth stages of winter wheat, with illustrations. Ann Appl Biol 110: 441–454.
Wellington, P.S., 1956. Studies on the germination of cereals. I. The germination of wheat grains in the ear during development, ripening and after-ripening. Ann Bot – London 20: 105–120.
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Lunn, G., Kettlewell, P., Major, B. et al. Variation in dormancy duration of the U.K. wheat cultivar Hornet due to environmental conditions during grain development. Euphytica 126, 89–97 (2002). https://doi.org/10.1023/A:1019651117813
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DOI: https://doi.org/10.1023/A:1019651117813