Scion/Rootstock Effects on Tree Size, Cumulative Yield and Yield Efficiency of 'Granny Smith' Apple and Its Sports, 'Granspur' and 'Greenspur'
DOI:
https://doi.org/10.71318/apom.1995.49.4.228Abstract
The influence of 5 rootstocks, seedling, MM.106, MM.111, M.7a and M.26, on tree size and production of 'Granny Smith,' 'Granspur' and 'Greenspur' apple trees planted in 1982 was evaluated over the first 7 years of fruit production (1987-93). For all scions, seedling rootstock produced the largest trees and M.26 produced the smallest. Significant differences among the effects on tree size of the remaining rootstocks depended upon the scion. By the end of the experiment, Granny Smith' was the most productive scion; 'Granspur' was least productive. Trees on MM.106 produced the most fruit per tree; trees on M.26 produced the least. For all scions, trees on seedling were least efficient. The most efficient trees depended upon the scion, e.g., M.26 was significantly more efficient than all other rootstocks with 'Granny Smith' but not with 'Greenspur' and 'Granspur.' In this experiment, 'Granny Smith' was the best cultivar, and MM.106 was the best rootstock, for cumulative yield. M.26 was consistently among the best rootstocks for cumulative yield efficiency.
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