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ISHS Acta Horticulturae 903: IX International Symposium on Integrating Canopy, Rootstock and Environmental Physiology in Orchard Systems

PERFORMANCE OF PRUNUS ROOTSTOCKS IN THE 2001 NC-140 PEACH TRIAL

Authors:   G.L. Reighard, T.G. Beckman, R. Belding, B.L. Black, J. Cline, W. Cowgill, R. Godin, R.S. Johnson, J. Kamas, M. Kaps, H. Larsen, T. Lindstrom, D. Ouellette, R. Pokharel, L. Stein, K. Taylor, C.S. Walsh, D. Ward, M.D. Whiting
Keywords:   Prunus persica L., peach × almond hybrids, peach × plum hybrids
DOI:   10.17660/ActaHortic.2011.903.63
Abstract:
Fourteen Prunus rootstock cultivars and selections budded with either ‘Redtop’, ‘Redhaven’ or ‘Cresthaven’ peach were planted at 11 locations in North America in 2001 in a randomized block design with a tree spacing of 5 by 6 m and 8 replicates. This test planting was a NC-140 Cooperative Regional Rootstock Project (www.nc140.org). There were 14 rootstocks, which included three peach seedling rootstocks: ‘Lovell’, ‘Bailey’, and Guardian® ‘BY520-9’ [selection SC-17] and 11 clonal rootstocks. Clonal rootstocks included peach × almond hybrids ‘BH-4’ and ‘SLAP’ (‘Cornerstone’); peach × plum hybrids ‘K146-43’ (‘Controller 5’), ‘K146-44’, and ‘P30-135’ (‘Controller 9’); interspecific plum hybrids ‘Hiawatha’, ‘Jaspi’ and ‘Julior’; interspecific Prunus hybrids ‘Cadaman®’ and ‘VVA-1’ (Krymsk® 1); and Prunus pumila selection ‘Pumiselect®’. The largest trees were from Georgia, Maryland, and South Carolina. ‘BH-4’, ‘SLAP’, SC-17, Lovell, and ‘Cadaman®’ were the most vigorous rootstocks. ‘Jaspi’, ‘K146-43’, ‘K146-44’ and ‘VVA-1’ were the least vigorous, having trunk circumferences 30-40% smaller than Lovell. No rootstock had a significantly higher survival rate than Lovell at all locations. ‘Julior’, ‘Jaspi’, and ‘VVA-1’ had significantly more root suckers. Cumulative fruit yields were highest on the peach seedling, peach × almond, and ‘Cadaman®’ rootstocks. Lowest cumulative yields were from trees on ‘Jaspi’, ‘VVA-1’, and ‘K146-44’ rootstocks. Fruit weight was significantly larger on ‘BH-4’, ‘SLAP’ and ‘Bailey’ rootstocks. ‘Bailey’ and ‘Jaspi’ had the highest and lowest cumulative yield efficiency, respectively.
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