Volume 48 Number 1 Article 18 Pages: 45-45
Year 1994 Month 1
Title: Developing Scab-Resistant Apple Cultivars with Increased Quality and Ability to Store
Authors: J.C. Goffreda, D.F. Polk, G.F. Reio, C.D. Gussman, T.J. Gianfagna, J.A. Crosby, J. Janick, P.C. Pecknold, S.S. Korban and S.M. Ries
Citation
Abstract:
The Rutgers apple breeding pro
gram is working in collaboration with
Purdue University and the University
of Illinois (the PRI breeding program)
to develop new disease resistant culti
vars with superior quality and storage
potential.
Selections which store for
several months and produce much
lower levels of ethylene have been
identified.
Storage studies were con
ducted to examine factors controlling
ethylene production in these unusual
selections and to determine if there is
a relationship between ethylene evolu
tion at room temperature (20C) and
the ability of the fruit to store.
DR101-
T110 and PAR14T238, both low eth
ylene producing selections, readily
converted ACC to ethylene.
Although
ethylene induces ripening, there were
nb significatrtrefatiDnships between
ethylene evolution and respiration or
the other quality parameters measured.
DR101T110, which produced less than
10 μL·kg-1hr-1 even after five months
in refrigerated storage, had one of
the highest respiration rates and soft
ened rapidly.
Alternatively, 'Liberty,'
the variety with the highest ethylene
evolution rate, storea for up to 5
months and softened at half the rate
of DR101T110. Clearly, respiration
and ethylene evolution rates are in
adequate predictors of the ability of
a variety to store.
Of the scab-resistant
varieties evaluated in these studies,
PAR14T238 was one of the most in
teresting.
This selection maintained
its firmness with a crisp texture for
the duration of this study.
The ground
color of this selection also changed
from a yellow-green to a bright yel
low.
Although this apple is somewhat
bland and lacks sweetness, it should
make an outstanding parent in future
crosses.
Full text download: APS subscribers
ISHS members & pay-per-view
Download all articles in volume 48 number 1 (for APS subscribers only) (all PDF's in .tar archive format)
(PDF 132475 bytes)
Translate:
APS membership administration
ISHS membership administration
