EFFECT OF GIBBERELLIC ACID (GA) ON THE SEEDLESS FRUITING OF ARTIFICIAL POLYPLOIDS IN LOQUATS (Eriobotrya japonica Lind. L.)
The experiment was undertaken to obtain seedless loquats, selected from artificial triploid strains got by crossing diploid loquat trees and a colchicine-induced tetraploid one. Japanese loquat "Tanaka" which is one of the leading varieties was used in this study. The triploid "Tanaka" had vigorous growth and did not show morphological changes, but bore only a few fruits. Whole trees of the triploid "Tanaka" were sprayed with aqueous solution of 100 ppm GA at the most suitable time when one third of a single flower cluster was flowering. A second spray was applied when young seedless fruit began to thicken. Consequently, we succeeded in producing seedless loquats: The flower cluster of triploid "Tanaka" having ovaries with weak seed formation produced a large number of seedless fruits of marketable size.
Muranishi, S. (1983). EFFECT OF GIBBERELLIC ACID (GA) ON THE SEEDLESS FRUITING OF ARTIFICIAL POLYPLOIDS IN LOQUATS (Eriobotrya japonica Lind. L.). Acta Hortic. 137, 343-348