Summary
The barley cultivars Akka, highly susceptible, and ‘Vada’, partially resistant to barley leaf rust, Puccinia hordei, were evaluated for the amount of leaf rust in five experimental field plot situations over three successive years. The field plot situations were: A) plots well isolated from each other by distance and non-leaf rust contributing host plants; B) adjacent plots of 4×41/2 m (18 rows); C) adjacent plots of 4×11/2 m (6 rows); D) adjacent plots of 4×1/4 m (1 row); E) adjacent plots of only one plant (cultivar mixtures).
The sporulating leaf area of each plot was measured from samples of 20 tillers taken at random from each plot. In each year the difference in sporulating area between ‘Akka’ and ‘Vada’ was large to very large in the absence of interplot interference in the isolated plots, ranging from 150 to 2100 times. In the adjacent plots the partial resistance of ‘Vada’ was greatly underestimated, 5 to 16 times in the situation B, 14 to 30 times in C, and 75 to 130 times in D and E.
Testing lines or cultivars in adjacent plots is the standard procedure in use in breeding programs and in tests of cultivars for their agricultural value. To avoid such under estimation the following procedure is suggested. A few cultivars representing the known range of partial resistance and whose level of partial resistance is well known are evaluated together with the lines and cultivars whose partial resistance has to be assessed. This is demonstrated with a number of cultivars of which resistance values are know from the recommended variety lists for England and Wales. Cultivars have been assessed in Wageningen over four years together with the check cultivars Akka, Sultan, Julia and Vada representing the range of partial resistance with values (on a 1 to 10 scale) of 1, 3–4, 7 and 8 respectively, based on isolated plots experiments.
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References
Anonymous, 1972–1981. Recommended varieties of cereals. Farmers leaflets 8, 1972 to 1981. Nat. Inst. Agric. Bot., Cambridge, England.
Clifford B. C. & E. R. L. Jones, 1977. Brown rust of barley. Physiologic race survey (Cereal Pathogens, 1976). Annual Report N.I.A.B., Cambridge: 19–20.
Clifford B. C. & E. R. L. Jones, 1982. Brown rust of barley. U.K. Cereal Pathogen virulence survey, 1981. Annual Report. N.I.A.B., Cambridge: 55–60.
Habgood R. M. & B. C. Clifford, 1981. Breeding barley for disease resistance: the essence of compromise. In: J. F. Jenkyn & R. T. Plumb (Eds), Strategies for the control of cereal disease. Blackwell Scient. Publ. Oxford, London, 15–25.
Neervoort W. J. & J. E. Parlevliet, 1978. Partial resistance of barley to leaf rust, Puccinia hordei. V. Analysis of the components of partial resistance in eight barley cultivars. Euphytica 27: 33–39.
Parlevliet J. E. & A.van Ommeren, 1975. Partial resistance of barley to leaf rust, Puccinia hordei. II. Relationship between field trials, micro-plot tests and latent period. Euphytica 24: 293–303.
Parlevliet J. E., W. H. Lindhout, A.van Ommeren & H. J. Kuiper, 1980. Level of partial resistance to leaf rust, Puccinia hordei, in West-European barley and how to select for it. Euphytica 29: 1–8.
Parlevliet J. E., 1983. Models explaining the specificity and durability of host resistance derived from the observations on the barley-Puccinia hordei system. In: F. Lamberti, J. M. Waller & N. A.van der Graaff (Eds), Durable resistance in crops. Plenum Press, New York and London, 57–80.
Van der Plank J. E., 1963. Plant diseases: Epidemics and control. Academic Press, New York-London, 349 pp.
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Parlevliet, J.E., Van Ommeren, A. Interplot interference and the assessment of barley cultivars for partial resistance to leaf rust, Puccinia hordei . Euphytica 33, 685–697 (1984). https://doi.org/10.1007/BF00021896
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DOI: https://doi.org/10.1007/BF00021896