RT Journal Article
SR Electronic
T1 Comparisons of Thompson Seedless Clones for Raisin Production
JF American Journal of Enology and Viticulture
JO Am J Enol Vitic.
FD American Society for Enology and Viticulture
SP 150
OP 154
DO 10.5344/ajev.1994.45.2.150
VO 45
IS 2
A1 Christensen, L. Peter
A1 Bianchi, Mary L.
YR 1994
UL http://www.ajevonline.org/content/45/2/150.abstract
AB A three-year study was conducted to compare three Thompson Seedless clones, 1A, Urla-HT, and Enns-HT. 1A is a University of California non-registered selection with mild grapevine leafroll; Urla-HT and Enns-HT are Turkish and California selections, respectively, heat-treated and registered virus-free. 1A and Urla-HT were compared with both cane- and long-spur pruning to determine if Urla-HT was more fruitful with spur pruning as reported. Enns-HT was compared under cane pruning only. Orthogonal comparisons of 1A vs. Urla-HT (all pruning treatments) and 1A vs. Enns-HT (cane pruning only) found 1A to produce higher raisin yields than Urla-HT or Enns-HT. This was attributed to the heavier berries and clusters of 1A. Additionally, 1A was more fruitful than Urla-HT, a contradiction to Urla's reported high fruitfulness characteristics. The larger vine size of Enns-HT confirmed field observations of vine growth but was accompanied by lower productivity as compared to 1A. The better performance of 1A, in spite of virus presence, suggests possible genetic differences in these clonal comparisons.