Volume 55 Number 3 Article 22
Year 2001 Month 7
Title: Performance of ´Golden Delicious,` ´Jonagold,` Empire,` and ´Rome Beauty` Apple Trees on Five Rootstocks Over Ten Years in the 1990 NC-140 Cultivar/Rootstock Trial
Authors: W.R. Autio, J.L. Anderson, J.A. Barden, G.R. Brown, R.M. Crassweller, P.A. Domoto, A. Erb, D.C. Ferree, A. Gaus, P.M. Hirst, C.A. Mullins and J.R. Schupp
Abstract:
At 12 sites in the United States, trials were established in 1990 which included four apple (Malus ×
domestica Borkh.) cultivars ('Smoothee Golden Delicious', 'Nicobel Jonagold', 'Empire', and 'Law
Rome Beauty') in all combinations on five rootstocks (M.9 EMLA, B.9, Mark, 0.3, and M.26 EMLA).
After ten growing seasons, rootstock and scion cultivar interacted significantly to affect trunk cross-sectional area (TCA), root suckering, yield efficiency, and fruit size but not survival or yield per tree.
In all
cases these statistically significant interactions contributed minimally to the variability among rootstocks and were relatively unimportant in determining tree performance.
Comparing cultivars after 10
years, survival was greatest for 'Empire' and poorest for 'Rome'. 'Jonagold' had the largest TCA, and
'Empire' and 'Rome' had the smallest.
Root suckering occurred most prevalently with 'Empire'. 'Rome'
yielded the most, and 'Jonagold' and 'Empire' yielded the least. 'Rome' trees also were the most yield
efficient, and 'Jonagold' trees were the least efficient.
Largest fruit were 'Rome' and 'Jonagold'. Comparing rootstock effects over 10 years, B.9 resulted in the greater tree survival than did O.3. M.9 EMLA,
and Mark, and M.26 EMLA resulted in intermediate survival.
Trees with the greatest TCA were on M.26
EMLA. Trees on M.9 EMLA and those on O.3 were similar and significantly smaller.
Trees on B.9 and
those on Mark were similar in size and the smallest in the trial.
The greatest root suckering developed
from B.9, Mark, and O.3, and the least came from M.26 EMLA. Trees on M.26 EMLA, 0.3, and M.9
EMLA yielded similarly and significantly more than those on B.9 or Mark.
The most yield efficient
trees, however, were on B.9 and Mark, and the least were on M.26 EMLA. M.26 EMLAand M.9 EMLA
resulted in the largest fruit size, and Mark resulted in the smallest.
Full text download: APS subscribers
ISHS members & pay-per-view
(PDF 836412 bytes)
Translate:
APS membership administration
ISHS membership administration
