. An analysis of the effects of selection. Natural selection. Fig. 7.—Means and standard deviations for 868 inbred minus line. Fio. 8.—Means and standard deviations for crossbred minus line. Table 15.—Crossbred Minus Series. Generation. n M a r Diff. M. Fi 323 688 1,022 1,473 1,603 401 265 245 177 .020 .017 .013 .014 .025 .026 .030 .039 .786=1= .014 .829=t .012 .735=t .009 .788± .010 .730=*= .017 .621=1= .018 .666=t .021 .767=1= .027 + + .711 + + .558 + + .742 + .511 + + Fb
. An analysis of the effects of selection. Natural selection. Fig. 7.—Means and standard deviations for 868 inbred minus line. Fio. 8.—Means and standard deviations for crossbred minus line. Table 15.—Crossbred Minus Series. Generation. n M a r Diff. M. Fi 323 688 1,022 1,473 1,603 401 265 245 177 .020 .017 .013 .014 .025 .026 .030 .039 .786=1= .014 .829=t .012 .735=t .009 .788± .010 .730=*= .017 .621=1= .018 .666=t .021 .767=1= .027 + + .711 + + .558 + + .742 + .511 + + Fb + - .048=1= .021 - .151± .017 + .026=t .016 - .142=1= .033 - .107=t .041 + .230=1= .041 - .191=t .049 Fj Ft Fa F, Fio Fa Fl2 6,097 *From Fi of the inbred speck line described later. Table 16 and figure 9 show the result. The break after Fg represents the same treatment as that given to the 1002 line (p. 10)—i. e., two generations of unselected mass cultures. This line gives perhaps the clearest evidence of the effectiveness of selection that we have yet observed. Reversed selection begun in Fz was apparently also successful. Finally, the hne after F2 gives consistently lower means than any other here Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Sturtevant, A. H. (Alfred Henry), 1891-1970. Washington, Carnegie Institution of Washington
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Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjectnaturalselection
