A number of selection schemes (especially in plant breeding) are based on using family information. Individuals may be chosen based on the mean of their families (among-family selection), on their standing within their family (either strict within-family selection or family-deviations selection), or on some weighted combination of these two factors (family index selection). This chapter reviews the general theory of response in such settings and examines the relative effectiveness of a number of different family-based selection decisions.
Keywords: among-family selection, autotetraploids, ear-to-row selection, family-deviations selection, Lush family index, plant breeding, progeny testing, recombination unit, selection unit, within-family selection
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