Volume 50 Number 3 Article 28
Year 1996 Month 7
Title: Evaluation of Quality Traits and Yield of 28 Strains of ´Delicious` Apple
Authors: W.D. Lane, R.A. MacDonald and D.O. Ketchie
Abstract:
Traits contributing to yield and fruit quality
of 28 spur and standard growth habit strains of
'Delicious' apple (Malus domestica Borkh.) were
studied.
Cumulative per tree yield to seventh
leaf (precocity) was consistently greater in the
spur strains averaging 33.7 kg compared to 20.4
kg for standard strains.
Mature tree yield was
nearly equal for the two tree types but average
yield efficiency was higher for the spur strains.
This was reflected in higher calculated per
hectare yields (45.1 compared to 28.8 tonnes).
Color and size grades were determined on a
commercial grading line.
The standard strain
'Early Red One' was notable as the best coloring strain and also had a higher efficiency ratio
than other standard strains in the fifth crop.
Color of strains ranged from a high of 59% to 0%
(B.C. extra fancy) with most spur strains developing less color than standard ones; but the spur
strains 'Ace,' 'Red King Oregon Spur' and
'Improved Ryan Spur' were highly ranked for
color.
The. spur strains with poorer color also
had smaller fruit. 'Red King Oregon Spur' and
'Aomori' had larger fruit than other strains.
Fruit
shape, seed number, soluble solids and flesh
firmness of strains varied less than color and
yield determining traits.
Full text download: APS subscribers
ISHS members & pay-per-view
(PDF 1047715 bytes)
APS membership administration
ISHS membership administration
