Effects of Cross and Self Fertilisation in the Vegetable Kingdom eBook

This eBook from the Gutenberg Project consists of approximately 516 pages of information about Effects of Cross and Self Fertilisation in the Vegetable Kingdom.

Effects of Cross and Self Fertilisation in the Vegetable Kingdom eBook

This eBook from the Gutenberg Project consists of approximately 516 pages of information about Effects of Cross and Self Fertilisation in the Vegetable Kingdom.

First generation of crossed and self-fertilised plants growing in competition with one another.

Sixty-five capsules produced from flowers on five crossed plants fertilised by pollen from a distinct plant, and fifty-five capsules produced from flowers on five self-fertilised plants fertilised by their own pollen, contained seeds in the proportion of :  100 to 93.

Fifty-six spontaneously self-fertilised capsules on the above five crossed plants, and twenty-five spontaneously self-fertilised capsules on the above five self-fertilised plants, yielded seeds in the proportion of :  100 to 99.

Combining the total number of capsules produced by these plants, and the average number of seeds in each, the above crossed and self-fertilised plants yielded seeds in the proportion of :  100 to 64.

Other plants of this first generation grown under unfavourable conditions and spontaneously self-fertilised, yielded seeds in the proportion of :  100 to 45.

Third generation of crossed and self-fertilised plants.

Crossed capsules compared with self-fertilised capsules contained seeds in the ratio of :  100 to 94.

An equal number of crossed and self-fertilised plants, both spontaneously self-fertilised, produced capsules in the ratio of :  100 to 38.

And these capsules contained seeds in the ratio of :  100 to 94.

Combining these data, the productiveness of the crossed to the self-fertilised plants, both spontaneously self-fertilised, was as :  100 to 35.

Fourth generation of crossed and self-fertilised plants.

Capsules from flowers on the crossed plants fertilised by pollen from another plant, and capsules from flowers on the self-fertilised plants fertilised with their own pollen, contained seeds in the proportion of :  100 to 94.

Fifth generation of crossed and self-fertilised plants.

The crossed plants produced spontaneously a vast number more pods (not actually counted) than the self-fertilised, and these contained seeds in the proportion of :  100 to 89.

Ninth generation of crossed and self-fertilised plants.

Fourteen crossed plants, spontaneously self-fertilised, and fourteen self-fertilised plants spontaneously self-fertilised, yielded capsules (the average number of seeds per capsule not having been ascertained) in the proportion of :  100 to 26.

Plants derived from A crossed with A fresh stock compared with intercrossed plants.

The offspring of intercrossed plants of the ninth generation, crossed by a fresh stock, compared with plants of the same stock intercrossed during ten generations, both sets of plants left uncovered and naturally fertilised, produced capsules by weight as :  100 to 51.

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Effects of Cross and Self Fertilisation in the Vegetable Kingdom from Project Gutenberg. Public domain.