The Effects of Cross and Self-Fertilisation in the Vegetable Kingdom

The Effects of Cross & Self-Fertilisation in the Vegetable Kingdom

Various means which favour or determine the cross-fertilisation of plants.Benefits derived from cross-fertilisation.Self-fertilisation favourable to the propagation of the species.Brief history of the subject.Object of the experiments, and the manner in which they were tried.Statistical value of the measurements.The experiments carried on during several successive generations.Nature of the relationship of the plants in the later generations.Uniformity of the conditions to which the plants were subjected.Some apparent and some real causes of error.Amount of pollen employed.Arrangement of the work.Importance of the conclusions. Ipomoea purpurea, comparison of the height and fertility of the crossed and self-fertilised plants during ten successive generations.Greater constitutional vigour of the crossed plants.The effects on the offspring of crossing different flowers on the same plant, instead of crossing distinct individuals.The effects of a cross with a fresh stock.The descendants of the self-fertilised plant named Hero.Summary on the growth, vigour, and fertility of the successive crossed and self-fertilised generations.Small amount of pollen in the anthers of the self-fertilised plants of the later generations, and the sterility of their first-produced flowers.Uniform colour of the flowers produced by the self-fertilised plants.The advantage from a cross between two distinct plants depends on their differing in constitution. ......Buy Now (To Read More)

Product details

Ebook Number: 4346
Author: Darwin, Charles
Release Date: Aug 1, 2003
Format: eBook
Language: English