The Effects of Cross & Self-Fertilisation in the Vegetable KingdomDarwin, Charles
Science
The Effects of Cross & Self-Fertilisation in the Vegetable Kingdom
Darwin, Charles
Fertilization of plants; Plants -- Variation; Pollination
Reseda odorata--first generation, descended from a highly self-fertile
plant, grown in pots:
19 : 19 : 67.
Reseda odorata--first generation, descended from a semi-self-fertile
plant, grown in pots:
20 : 20 : 99.
Dianthus caryophyllus--plants of the third generation:
8 : 8 : 49.
Petunia violacea--plants of the fifth generation, in pots:
22 : 21 : 22.
Petunia violacea--plants of the fifth generation, in open ground:
10 : 10 : 36.
TABLE 7/C.--Relative heights, weights, and fertility of plants from
parents crossed by a fresh stock, and from parents either
self-fertilised or intercrossed with plants of the same stock.
Column 1: Names of the plants and nature of the experiments.
Column 2: Number of plants from a cross with a fresh stock.
Column 3: Average height in inches and weight.
Column 4: Number of the plants from self-fertilised or intercrossed
parents of the same stock.
Column 5: Average height in inches and weight.
Column 4: x, where the ratio of the Height, Weight and Fertility of the
plants from the Cross with a fresh stock is expressed as 100 to x.
Ipomoea purpurea--offspring of plants intercrossed for nine generations
and then crossed by a fresh stock, compared with plants of the tenth
intercrossed generation:
19 : 84.03 : 19 : 65.78 : 78.
Ipomoea purpurea--offspring of plants intercrossed for nine generations
and then crossed by a fresh stock, compared with plants of the tenth
intercrossed generation, in fertility:
.. : .. : .. : .. : 51.
Mimulus luteus--offspring of plants self-fertilised for eight
generations and then crossed by a fresh stock, compared with plants of
the ninth self-fertilised generation:
28 : 21.62 : 19 : 10.44 : 52.
Mimulus luteus--offspring of plants self-fertilised for eight
generations and then crossed by a fresh stock, compared with plants of
the ninth self-fertilised generation, in fertility:
.. : .. : .. : .. : 3.
Mimulus luteus--offspring of plants self-fertilised for eight
generations and then crossed by a fresh stock, compared with the
offspring of a plant self-fertilised for eight generations, and then
intercrossed with another self-fertilised plant of the same generation:
28 : 21.62 : 27 : 12.20 : 56.
Mimulus luteus--offspring of plants self-fertilised for eight
generations and then crossed by a fresh stock, compared with the
offspring of a plant self-fertilised for eight generations, and then
intercrossed with another self-fertilised plant of the same generation,
in fertility:
.. : .. : .. : .. : 4.
Brassica oleracea--offspring of plants self-fertilised for two
generations and then crossed by a fresh stock, compared with plants of
the third self-fertilised generation, by weight:
6 : : 6 : : 22.
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