Summary
A relationship is demonstrated between pattern of growth, as summarised by either the quadratic coefficient of the growth curve or the proportion of the final height achieved by the middle of the growing season, and environmental sensitivity of final height among the 60 D inbred lines derived from a cross between varieties 2 and 12 of Nicotiana rustica.
The heritability and repeatability over diverse environments of the quadratic coefficient are both relatively high. Indirect selection for environmental sensitivity by selecting for the quadratic coefficient is, therefore, a practical alternative that overcomes many of the problems of direct selection reported by Brumpton, Boughey and Jinks (1977) and Jinks; Jayasekara and Boughey (1977).
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References
Boughey, Hilarie, and Jinks, J L. 1978. Joint selection for both extremes of mean performance and of sensitivity to a macro-environmental variable. III. The determinants of sensitivity. Heredity, 40, 363–369.
Brumpton, R J, Boughey, Hilarie, and Jinks, J L. 1977. Joint selection for both extremes of mean performance and of sensitivity to a macro-environmental variable. I. Family selection. Heredity, 38, 219–226.
Jinks, J L, Jayasekara, N E M, and Boughey, Hilarie. 1977. Joint selection for both extremes of mean performance and of sensitivity to a macro-environmental variable. II. Single seed descent. Heredity, 39, 345–355.
Mather, K, and Jinks, J L. 1971. Biometrical Genetics. London: Chapman and Hall.
Perkins, J M. 1974. Orthogonal and principal components analysis of genotype-environmental interactions for multiple metrical traits. Heredity, 32, 189–209.
Perkins, J M, and Jinks, J L. 1968. Environmental and genotype-environmental components of variability. IV. Non-linear interactions for multiple inbred lines. Heredity, 23, 525–536.
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Boughey, H., Jinks, J., Coombs, D. et al. Joint selection for both extremes of mean performance and of sensitivity to a macroenvironmental variable. Heredity 41, 175–183 (1978). https://doi.org/10.1038/hdy.1978.86
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DOI: https://doi.org/10.1038/hdy.1978.86
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