. Contributions from the Laboratory of Plant Genetics. 20 THE AMERICAN NATURALIST [Vol. XLVIII the F7 generation means being ± .11 leaves and ± .15 leaves, respectively, but in the F8 generations they differ. Selecting minus extremes for the first two genera-. Fig. 2. Plant of Halladay Havana Tobacco (77-1)-1-1, which Averages Leaves Per Plant. It is the Result of Three Years of Selection fob Low Leaf Number in Family 77. New Haven, 1912. tions reduced the mean of that line from ± .10 leaves to ± .15 leaves, but the third selected generation (F8) had a higher mean than
. Contributions from the Laboratory of Plant Genetics. 20 THE AMERICAN NATURALIST [Vol. XLVIII the F7 generation means being ± .11 leaves and ± .15 leaves, respectively, but in the F8 generations they differ. Selecting minus extremes for the first two genera-. Fig. 2. Plant of Halladay Havana Tobacco (77-1)-1-1, which Averages Leaves Per Plant. It is the Result of Three Years of Selection fob Low Leaf Number in Family 77. New Haven, 1912. tions reduced the mean of that line from ± .10 leaves to ± .15 leaves, but the third selected generation (F8) had a higher mean than the original family ( ± .08 leaves). The parent plant of this F3 generation produced. 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 Bussey Institution. Boston : [s. n. ]
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