Abstract
Methods of cross prediction have been developed by workers in the Genetics Department of the University of Birmingham. The frequency of families whose mean deviate from m by any specified amount can be estimated from m and √D using the normal probability integral (Jinks and Pooni, 1976).
In the present paper it is shown that satisfactory estimates of the genetical parameters for cross prediction in spring barley can be obtained from either F3 or doubled haploid families. Furthermore, both systems provide a reliable way of ranking crosses but on average the doubled haploid system gave closer agreement between observed and expected. It is shown that estimates of both m and √D are needed for accurate predictions. However, when data from an earlier TTC experiment were examined it was clear that genotype × environment interactions need to be taken into account if such predictions are to be of value in plant breeding.
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Caligari, P., Powell, W. & Jinks, J. The use of doubled haploids in barley breeding 2. An assessment of univariate cross prediction methods. Heredity 54, 353–358 (1985). https://doi.org/10.1038/hdy.1985.48
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DOI: https://doi.org/10.1038/hdy.1985.48
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