Evaluation of the Cornell-Geneva Apple Rootstocks and Other Promising Apple Rootstocks.- Progress Report 2017

Gennaro Fazio, Plant Genetic Resources Unit USDA ARS, Geneva NY, United States of America;gennaro.fazio@ars.usda.gov Jaume Lordan Sanahuja, Horticulture Section, School of Integrative Plant Sciences, Cornell University, Geneva NY, United States of America;jl3325@cornell.edu Poliana Francescatto, Postdoctoral Associate, Department of Horticulture, Cornell University, NYS Agricultural Experiment Station, Geneva, NY 14456, Tel: 315-787-2227; Email: pf246@cornell.edu Gregory Peck, Horticulture Section, School of Integrative Plant Sciences, Cornell University, Geneva NY, United States of America;pf246@cornell.edu Terence Robinson, Horticulture Section, School of Integrative Plant Sciences, Cornell University, Geneva NY, United States of America;tlr1@cornell.edu

Published on: May 23

PROGRESS REPORT

Experiments relating to the adaptability, dwarfing level, survival, precocity, and productivity, of elite rootstocks (objective 1), and evaluation of the effect of tissue culture propagation on the performance of Geneva rootstocks (objective 2).

2010 NC-140 Honeycrisp Apple Rootstock Trial (Table 1 & Table 2):

The most dwarfing stock in this trial was B.71722, which was too dwarfing for commercial use. CG.2034 and B.9 were very dwarfed while G.11 and G.41TC were slightly larger. B.10, M9T337, Sup.3, G.935TC, M.9Pajam2, M.26, G.41N, CG.4003, CG.4214, and G.935N were all slightly larger and similar. A larger group included CG.5087, CG.4814, and CG.5222. A more vigorous group included G.202TC, CG.4004, G.202N, CG.3001, Piau51-11, CG.4013, and B.67-5-32. The most vigorous stocks included B.7-20-21, Piau990, B.7-3-150, B.70-6-8 and B.64-194.

CG.4013 had the highest number of root suckers, followed by M.9Pajam2, G.935TC, CG.5222, G.935N, and CG.4004. Taking a look at the cumulative number of suckers (2010-2017), M.9Pajam2, CG.5222, and CG.4013 were the ones with higher numbers.

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