Whilst the seedlings were very small the two crossed rows had a clear
advantage over the two self-fertilised rows. When fully grown the twenty
tallest crossed plants and the twenty tallest self-fertilised plants
were selected and measured on the 11th of November to the extremities of
their leaves, as shown in Table 6/90. Of the twenty crossed plants,
twelve had flowered; whilst of the twenty self-fertilised plants one
alone had flowered.
TABLE 6/90. Nicotiana tabacum. Plants raised from the same seeds as in
the last two experiments, but sown separately in the open ground, so as
not to compete together.
Heights of plants measured in inches.
Column 1: Kew-crossed Plants, from pot 2, Table 6/87.
Column 2: Plants of the fourth Self-fertilised generation, from pot 2,
Table 6/87.
Column 3: Kew-crossed Plants, from pot 5, Table 6/87.
Column 4: Plants of the fourth Self-fertilised generation, from pot 5,
Table 6/87.
42 2/8 : 22 6/8 : 54 4/8 : 34 4/8.
54 5/8 : 37 4/8 : 51 4/8 : 38 5/8.
39 3/8 : 34 4/8 : 45 : 40 6/8.
53 2/8 : 30 : 43 : 43 2/8.
49 3/8 : 28 6/8 : 43 : 40.
50 3/8 : 31 2/8 : 48 6/8 : 38 2/8.
47 1/8 : 25 4/8 : 44 : 35 6/8.
57 3/8 : 26 2/8 : 48 2/8 : 39 6/8.
37 : 22 3/8 : 55 1/8 : 47 6/8.
48 : 28 : 63 : 58 5/8.
478.75 : 286.86 : 496.13 : 417.25
The twenty tallest crossed plants here average 48.
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