RT Journal Article
SR Electronic
T1 Ampelographic and Isozyme Data Correcting the Misnaming of the Grape Rootstock SO4 at the University of California, Davis
JF American Journal of Enology and Viticulture
JO Am J Enol Vitic.
FD American Society for Enology and Viticulture
SP 261
OP 265
DO 10.5344/ajev.1992.43.3.261
VO 43
IS 3
A1 M. A. Walker
A1 J. M. Boursiquot
YR 1992
UL http://www.ajevonline.org/content/43/3/261.abstract
AB Seven selections of the grape rootstock SO4 (Selection Oppenheim #4) in the University of California, Davis, Vitis collections were misnamed and have been correctly identified as Teleki 5C. The leaves, shoots and overall appearance of SO4 and Teleki 5C were very similar, however they could be separated with several morphological features. Teleki 5C had bifid and trifid tendrils in approximately equal numbers, its young leaves and shoot tips were predominantly green, and its maturing shoots were minutely pubescent and longitudinally striped with red pigmentation. SO4 had trifid tendrils, bifid were rare, its shoot tips and young leaves had a bronze cast, and its maturing canes were glabrous and uniformly (not striped) red. Cambial scrapings from dormant canes produced reliable and consistent isozyme profiles with aspartate aminotransferase (AAT) which confirmed the ampelographic characterization of the two rootstocks.