Variation in Growth, Spur Density, and Yield of `MacSpur McIntosh

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...

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Bibliographic Details
Published inHortScience Vol. 26; no. 2; pp. 188 - 190
Main Authors Embree, C.G, McRae, K.B, Estabrooks, E.N, Pratt, C
Format Journal Article
LanguageEnglish
Published Alexandria, VA American Society for Horticultural Science 01.02.1991
Subjects
Agronomy. Soil science and plant productions
Biological and medical sciences
Cultivars: description, identification, tests, catalogs
Fundamental and applied biological sciences. Psychology
Genetics and breeding of economic plants
Varietal selection. Specialized plant breeding, plant breeding aims
Growth
Rosaceae
Malus domestica
Sport
Spur (growth habit)
Dicotyledones
Angiospermae
Spermatophyta
Yield
Fruit tree
Mutation
Spur
Cultivar
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Summary: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.
ISSN:0018-5345
2327-9834
DOI:10.21273/HORTSCI.26.2.188