. Journal of Agricultural Research. ^ ^ 6 ^ ^. ^ Nf CM 5^§i§ Fig. 9.—Frequency distributions with respect to number of tassel branches on liguleless and nonligulelessplants. All plants of normal stature. Shaded portion, lignleless plants; mean normal, ; meanligvileless, ; difference, ; D/E=; biserial r= — the nature of a disherence, since the parental combination was ligulelessand wide-leafed. Disherences of tliis nature where deleterious vari-ations are combined with characters of diminished size indicate some 54485—23 3 3i8 Journal of Agricultural Research
. Journal of Agricultural Research. ^ ^ 6 ^ ^. ^ Nf CM 5^§i§ Fig. 9.—Frequency distributions with respect to number of tassel branches on liguleless and nonligulelessplants. All plants of normal stature. Shaded portion, lignleless plants; mean normal, ; meanligvileless, ; difference, ; D/E=; biserial r= — the nature of a disherence, since the parental combination was ligulelessand wide-leafed. Disherences of tliis nature where deleterious vari-ations are combined with characters of diminished size indicate some 54485—23 3 3i8 Journal of Agricultural Research Vol. XXV, No. 7 physiological cause. Thus, crosses between short plants wath broadleaves and tall plants with narrow leaves usually show in the F, a corre-lation between tall plants and ^^^de leaves—a correlation easily under-stood. Some such explanation may apply in other cases of disherencewhere the physiological relationships are not indicated so clearly, butare working at cross purposes with genetic relationships. The
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