The Fruit Breeding of Thomas Andrew Knight

Thomas Andrew Knight

Thomas Andrew Knight

On August 12, 1759English horticulturalist and botanist Thomas Andrew Knight was born. Knight initiated the field of fruit breeding, experimental horticulture while also studying plant physiology with botanical experiments. He made studies on the movement of sap in plants, the nature of the cambium, and phototropism in tendrils. To investigate the geotropism of roots and stems, he invented a machine, rotating to simulate gravity with centrifugal force in either horizontal or vertical position.

Thomas Andrew Knight studied at Balliol College, Oxford. Afterwards, Knight began studying horticulture. In 1795 he published the results of his research into the propagation of fruit trees and the diseases prevalent among them. Thomas Knight inherited land and used about 4,000 ha to perform breeding of plants including strawberries, cabbages and peas and built an extensive greenhouse. Knight published his ‘Treatise on the Culture of the Apple and Pear, and on the Manufacture of Manufacture of Cider and Perry‘. The work was quite successful and passed through several editions.

Throughout his scientific career, Knight performed physiological experiments on plants. He elucidated the effects of gravity on seedlings and how decay in fruit trees was passed on by grafting. In many respects his work looked back to that of Rev. Stephen Hales. His goals were always strictly practical, aiming to improve useful food plants by breeding for better qualities. The Downton strawberry was the ancestor of most important modern strawberries until recent times. Similar to Mendel, Thomas Knight studied variation in peas and found many of the same results as Mendel. However, he failed to make the same imaginative leap about how these changes took place. It is believed that Thomas Knight intentionally shut himself off from outside scientific influences and that he refused to read anyone else’s scientific papers until Sir Joseph Banks, with whom he had a voluminous correspondence, persuaded him to do so.

Thomas Knight was president of the London Horticultural Society from 1811 to 1838. There, he wrote a “prospectus” for the society, kind of like a mission statement, outlining the society’s functions and purpose. Younger members of the society were inspired by his work and scientists like Thomas Laxton carried on his principles of careful observation and practical goals.

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