Summary
When germplasm is evaluated over a period of time and a range of environments, there is a danger that the basis of evaluation will change. The extent of such variation in samples from a germplasm collection was assessed using powdery mildew resistance in barley as an example. The changes found are believed to be representative of those commonly encountered by breeders when using samples from collections. Results show that substantial deviations from the original scores can occur. The implications of this variation are discussed.
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Ashworth, L.J.Jr., S.A., Gaona & E., Surber, 1985. Verticillium wilt of pistachio: the influence of potassium nutrition on susceptibility to infection by Verticillium dahliae. Phytopathology 75: 1091–1093.
Benjamin, L.R. & R.C., Hardwick, 1986. Sources of variation and measures of variability in even-aged stands of plants. Annals of Botany 58: 757–778.
Briggs, D. & S.M., Walters, 1984. Plant Variation and Evolution. (Second Ed.) Cambridge University Press, Cambridge.
Cho, B.H. & V., Smedegaard-Petersen, 1986. Induction of resistance to Erysiphe graminis f. sp. hordei in near-isogenic barley lines. Phytopathology 76: 301–305.
De, Smet, G.M.W., A.L., Scharen & E.A., Hockett, 1985. Conservation of powdery mildew resistance genes in three composite cross populations of barley. Euphytica 34: 265–272.
Dolan, T.E., Y., Cohen, & M.D., Coffey, 1986. Protection of Persea species against Phytophthora cinnamomi and P. citricola by prior inoculation with a citrus isolate of P. parasitica. Phytopathology 76: 194–198.
Finlay, K.W. & G.N., Wilkinson, 1963. The analysis of adaptation in a plant-breeding programme. Aust. J. Agric. Res. 14: 742–54.
Gerechter-Amitai, Z.K., E.L., Sharp & M., Reinhold, 1984. Temperature-sensitive genes for resistance to Puccinia striiformis in Triticum dicoccoides. Euphytica 33: 665–672.
Horst, G.L., M.C., Engelke, & W., Meyers, 1984. Assessment of visual evaluation techniques. Agron. J. 76: 619–622.
Knudsen, J.C.N., H.-H., Dalsgaard & J.H., Jørgensen, 1986. Field assessment of partial resistance to powdery mildew in spring barley. Euphytica 35: 233–243.
Marshall, D.R. & A.H.D., Brown, 1981. Wheat genetic resources. In: L.T., Evans & J.W., Peacock (Eds.), Wheat Science Today and Tomorrow. Cambridge University Press, Cambridge. pp 21–40.
Peeters, J.P. 1988. Crop variability and its exploitation through germplasm collections: an assessment based on barley. Ph.D. thesis. Cambridge University.
Peeters, J.P. & N.W., Galwey, 1988. Germplasm collections and breeding needs in Europe. Econ. Bot. 42: 503–521.
Powell, W., P.D.S., Caligari, M.S., Phillips & J.L., Jinks, 1986. The measurement and interpretation of genotype by environment interaction in spring barley (Hordeum vulgare). Heredity 56: 255–262.
Schlichting, C.D. 1986. The evolution of phenotypic plasticity in plants. Ann. Rev. Ecol. Syst. 17: 667–93.
Stenzel, K., S., Ulrike & F., Schönbeck, 1985. Effect of induced resistance on the efficiency of powdery mildew haustoria in wheat and barley. Physiol. Plant Pathol 27: 357–367.
Zeven, A.C. 1985. The genetics of auricle colour of wheat (Triticum aestivum) L.: a review. Euphytica 34: 233–236.
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Peeters, J.P., Albrecht, J.C., Galwey, N.W. et al. Variation over time and environments in resistance to Erysiphe graminis hordei in samples from a barley germplasm collection. Euphytica 46, 43–50 (1990). https://doi.org/10.1007/BF00057617
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DOI: https://doi.org/10.1007/BF00057617