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Darwin, Charles, 1809-1882

"Effects of Cross and Self Fertilisation in the Vegetable Kingdom"

They were kept separate from two similar lots of
seeds produced by the two plants in Pot 4 in the same table, in which
the crossed plant was much taller than its self-fertilised opponent.
CROSSED AND SELF-FERTILISED PLANTS OF THE FOURTH GENERATION (RAISED FROM
THE PLANTS IN POT 1, TABLE 6/79).
Crossed and self-fertilised seeds from plants of the last generation in
Pot 1 in Table 6/79, were placed on sand, and after germinating, were
planted in pairs on the opposite sides of four pots. The seedlings when
in full flower were measured to the base of the calyx. The remaining
seeds were sown crowded on the two sides of Pot 5; and the four tallest
plants on each side of this pot were measured in the same manner.
TABLE 6/80. Petunia violacea (fourth generation; raised from plants of
the third generation in Pot 1, table 6/79).
Heights of plants measured in inches.
Column 1: Number (Name) of Pot.
Column 2: Crossed Plants.
Column 3: Self-fertilised Plants.
Pot 1 : 29 2/8 : 30 2/8.
Pot 1 : 36 2/8 : 34 6/8.
Pot 1 : 49 : 31 3/8.
Pot 2 : 33 3/8 : 31 5/8.
Pot 2 : 37 3/8 : 38 2/8.
Pot 2 : 56 4/8 : 38 4/8.
Pot 3 : 46 : 45 1/8.
Pot 3 : 67 2/8 : 45.
Pot 3 : 54 3/8 : 23 2/8.
Pot 4 : 51 6/8 : 34.
Pot 4 : 51 7/8 : 0.
Pot 5 : 49 4/8 : 22 3/8.
Pot 5 : 46 3/8 : 24 2/8.
Pot 5 : 40 : 24 6/8.


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