I Michael Lerner

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N E of the fundamental steps in any analysis of the inheritance of quan0 titative characters is the partitioning of the total phenotypic variance of the trait under study into it; genetic and environmental portions. The various techniques for this purpose for characters showing continuous or graded types of variation are well known (see WHATLEY 1942). They(More)
IN the absence of disturbing factors, a phenotypic trait whose genetic variance is determined by alleles at a single locus will respond to selection pressure until fixation of the most desirable allele is attained. Presumably similar exhaustion of genetic variation may account for deceleration and eventual cessation of gains from selection of a character(More)