Vegetative and fruiting characteristics were measured for a spur mutant of `McIntosh' apple (Malus × domestics Borkh.). Nine-year-old `MacSpur' trees in an orchard in New Brunswick, Canada, were grouped according to three degrees of spurriness. Reduced terminal growth, fewer limbs per tree, more flowering spurs per unit length of 2- and 3-year-old wood, less yield, and lower yield efficiency were associated with the highest degree of spurriness. The variability suggests that `MacSpur' may be an unstable periclinal chimera.
C.G. Embree, K.B. McRae, E.N. Estabrooks and C. Pratt
Lisa Klima Johnson, Anish Malladi and D. Scott NeSmith
thickness were correlated with cell size among 20 genotypes ( Cheniclet et al., 2005 ). In apple, cell size contributed to fruit size variation among five genotypes ( Harada et al., 2005 ). Also, alteration in fruit size in a spontaneous apple mutant was