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Maude Lachapelle, Gaétan Bourgeois and Jennifer R. DeEll

and Methods Experimental sites and years of harvest. Firmness data were obtained from ‘McIntosh’ apples ( Malus × domestica Borkh. cv. McIntosh) harvested in nine sites, five in Quebec (Saint-Paul d’Abbotsford, Franklin, Frelighsburg, Oka, and Mont

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Gregory M. Peck, Ian A. Merwin, Michael G. Brown and Arthur M. Agnello

Extensive disease and arthropod problems, in addition to tree nutrition and crop load adjustment, pose barriers to adoption of integrated (IFP) and organic fruit production (OFP) of apples ( Malus × domestica Borkh.) in the northeastern United

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Gerry Neilsen, Denise Neilsen, Shufu Dong, Peter Toivonen and Frank Peryea

Calcium application trials were undertaken in a 'Braeburn' apple (Malus ×domestica Borkh.) orchard with a history of bitter pit development at harvest. In 2000, an early season calcium chloride application strategy was compared with the unsprayed control and a late season application strategy. From 2001–03, the assessment of timing of calcium chloride sprays was extended by comparing effects of five weekly sprays applied during the growing season either early, middle, or late season. Other Ca application strategies tested included sprays of acidified calcium carbonate suspensions and soil application of calcium thiosulphate. In the first experiment, early application of calcium chloride reduced the occurrence of bitter pit at harvest and after 3 months cold air storage, despite having low harvest fruit Ca concentrations. Late sprayed fruit had a higher incidence of bitter pit. In the second experiment, the later calcium chloride was sprayed in the growing season, the higher the fruit Ca concentration at harvest. Despite this, no bitter pit was measured at harvest for 2 years for early and midseason calcium chloride spray regimes. In 2003, when Ca disorders were severe and fruit large, bitter pit was observed despite early season calcium chloride sprays. Soil calcium thiosulphate application and foliar sprays of acidified calcium carbonate suspensions failed to meaningfully augment harvest fruit Ca concentrations and affect bitter pit incidence.

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Kate M. Evans, Bruce H. Barritt, Bonnie S. Konishi, Marc A. Dilley, Lisa J. Brutcher and Cameron P. Peace

functional allelic diversity of Md-Exp7, a new putative expansin gene associated with fruit softening in apple ( Malus × domestica Borkh.) and pear ( Pyrus communis ) Tree Genet. Genomes 4 575 586 Mann, H.S. Alton, J

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Ibrahim I. Tahir, Sven-Erik Svensson and David Hansson

properties and tree performance in an organic apple (Malus domestica Borkh) orchard in northern Patagonia Plant Soil 292 193 203 Sanchez, J. Edson, C. Bird, G. Whalon, M. Willson, T. Harwood, R. Kizilkaya, K. Nugent, J. Klein, W. Middleton, A. Loudon, T

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Hatsuhiko Okada, Yoshitaka Ohashi, Mamoru Sato, Hideyuki Matsuno, Toshiya Yamamoto, Hoytaek Kim, Tatsuro Tukuni and Sadao Komori

sequences and development of a CAPS system of the S-RNase gene for identification of 22 S haplotypes of apple ( Malus × domestica Borkh.) Mol. Breed. 23 463 472 Kim, H. Park, J. Hirata, Y. Nou, I

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Lidia Lozano, Ignasi Iglesias, Diego Micheletti, Michela Troggio, Satish Kumar, Richard K. Volz, Andrew C. Allan, David Chagné and Susan E. Gardiner

in apple ( Malus × domestica Borkh.) breeding programmes: Prospects, challenges and strategies Tree Genet. Genomes 8 1 14 Kumar, S. Garrick, D.J. Bink, M.C. Whitworth, C. Chagné, D. Volz, R.K. 2013 Novel genomic approaches unravel genetic

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Kanin J. Routson, Ann A. Reilley, Adam D. Henk and Gayle M. Volk

.F. McFerson, J.R. 1998 Microsatellite (SSR) markers reveal genetic identities, genetic diversity and relationships in Malus ×domestica Borkh. core subset collection Theor. Appl. Genet. 97 671 683 Horgan, P. 1975 Lamy of Santa Fe: His life and times, a

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Mokhles A. Elsysy and Peter M. Hirst

of apple trees brought about by fruiting J. Hort. Sci. 38 119 128 Meland, M. 2009 Effects of different crop loads and thinning times on yield, fruit quality, and return bloom in Malus × domestica Borkh. ‘Elstar’ J. Hort. Sci. Biotechnol. 84 117 121

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Bishnu P. Khanal, Rejina Shrestha, Leonie Hückstädt and Moritz Knoche

) in a large number (22) of apple cultivars selected to represent a maximum range in russet susceptibility. Materials and Methods Mature apple ( Malus ×domestica Borkh.) fruit were obtained from the following sites: ‘Granny Smith’ from South Tirol (lat