Summary
A method is proposed, using wheat yield data for New South Wales as an example, for estimating the gross environmental effect of a year. For each of ten regions of the State the environmental effects for the years 1922-70 follow a lognormal distribution. The fitted curves may be used to make probability statements about the effects of particular years.
The mean yields of wheat variety trials are highly correlated with the estimated effects for a region, although the data for at least two locations are needed for a high correlation in all cases. The possible uses for estimated effects and for the fitted lognormal curves are discussed.
Similar content being viewed by others
Article PDF
References
Bliss, C I. 1967. Statistics in Biology, Volume 1. McGraw-Hill, New York.
Cornish, E A. 1949. Yield trends in the wheat belt of South Australia during 1896–1941. Aust J Sci Res, series B, 2, 83–137.
Cornish, E A. 1950. The influence of rainfall on the yield of wheat in South Australia. Aust J Sci Res, series B, 3, 178–218.
Finlay, K W, and Wilkinson, G N. 1963. The analysis of adaptation in a plant breeding programme. Aust J Agr Res, 6, 742–754.
Freeman, G H, and Perkins, Jean M. 1971. Environmental and genotype-environmental components of variability. VIII. Relations between genotypes grown in different environments and measures of these environments. Heredity, 27, 15–23.
Fripp, Yvonne. 1972. Genotype-environmental interactions in Schizophyllum commune. II. Assessing the environment. Heredity, 28, 223–238.
Kendall, M G, and Stuart, A. 1963. The Advanced Theory of Statistics Volume 1, Distribution Theory. Charles Griffin, London.
Knight, R. 1970. The measurement and interpretation of genotype-environment interactions. Euphytica, 19, 225–235.
Yates, F, and Cochran, W G. 1938. The analysis of groups of experiments. J Agric Sci, 28, 556–580.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Pederson, D. The stability of varietal performance over years. Heredity 32, 85–94 (1974). https://doi.org/10.1038/hdy.1974.7
Received:
Issue date:
DOI: https://doi.org/10.1038/hdy.1974.7
This article is cited by
-
Two theories of sex and variation
Experientia (1985)
-
The stability of varietal performance over years
Heredity (1974)
