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Vegetative Selection

Roses
Nicolas: Reymond's improved Général Jacqueminot (1937)
Corbett: Vegetative propagation: blind vs. flowering (1907)
Moreau-Robert: Improving Commandant Beaurepaire (1882)
Nobbs: Thornless R. x Fortuniana by selection (1984)

Potatoes
Zuckerman: Selection of parent seed potatoes (1942)
The geneticist clings strongly to the belief that under vegetative reproduction several of these factors cannot be controlled and that the pattern of the variety remains unchanged through unlimited generations of vegetative reproduction. There is little need to combat this theory except to say that it does not explain all the events that occur and if it is closely followed, the door is closed to possible improvement in the vegetative selection of parent seed potatoes.
Goff: Vegetative selection of potatoes (1899)
Eustace: Vegetative Selection of Potatoes (1905)
Whipple: Line-Selection of Potatoes (1920)
Cooper: Improving Sweet Potatoes (1799)