APS-Journal Jan 2017

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January 2017 Volume 71 CONTENTS Small Genomes in Tetraploid Rubus L. (Rosaceae) from New Zealand and Southern

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Published by THE AMERICAN POMOLOGICAL SOCIETY Journal of the American Pomological Society (ISSN 1527-3741) is published by the American Pomological Society as an annual volume of 4 issues, in January, April, July and October. Membership in the Society includes a volume of the Journal. Most back issues are available at various rates. Paid renewals not received in the office of the Business Manager by January 1 will be temporarily suspended until payment is received. For current membership rates, please consult the Business Manager. Editorial Office: Manuscripts and correspondence concerning editorial matters should be addressed to the Editor: Richard Marini, 203 Tyson Building, Department of Plant Science, University Park, PA 16802-4200 USA; Email: richmarini1@gmail.com. Manuscripts submitted for publication in Journal of the American Pomological Society are accepted after recommendation of at least two editorial reviewers. Postmaster: Send accepted changes to the Business office. Business Office : Correspondence regarding subscriptions, advertising, back issues, and Society membership should be addressed to the Business Office, ASHS, 1018 Duke St., Alexandria, VA 22314; Tel 703-836-4606; Email: ashs@ashs.org Page Charges : A charge of $50.00 per page for members and $65.00 per page ($32.00 per half page) will be made to authors for those articles constituting publication of research. In addition to the page charge, there will be a charge of $40.00 per page for tables, figures and photographs. SocietyAffairs : Matters relating to the general operation of the society, awards, committee activities, and meetings should be addressed to the Secretary, Dr. Todd Einhorn, Mid-Columbia Agricultural Research and Extension Center, 3005 Experiment Station Drive, Hood River, OR 97031 USA; Email: todd.einhorn@oregonstate.edu Society Web Site : http://americanpomological.org Becky L. Carroll, and Donna Marshal-Shaw.........................................................................................................47 Susan Brown: Recipient of the 2006 Wilder Medal...............................................................................................55 The Pioneering Horticulturist Marshal Pinckney Wilder – John R. Clark.............................................................56 George M. Darrow: The Dean of Small Fruits – Marvin P. Pritts and Alyssa A. Pritts.........................................59 Index for Volume 70...............................................................................................................................................62 Instructions to Authors...........................................................................................................................................64 South America – Kim E. Hummer and Lawrence A. Alice......................................................................................2 The Effect of Plant Growth Regulators on Apple Graft Union Flexural Strength and Flexibility – Stuart Adams, Brent L. Black, Gennaro Fazio, and A. Roberts (U.P. Hedrick award – First Place)..............................................8 Potential Anatomical Methods for the Determination of Weak Wood in Apple – Michael Basedow and Robert Crassweller.................................................................................................................................................19 About the Cover: Rubus parvus Buch and Rubus Hybrid ʻTriple Crownʼ Blackberry..........................................28 Effect of the Seedlessness (Fs) Gene in Fruit Quality Traits in Mandarin Segregating Populations – Zach Tucker, Dario J. Chavez, and José X. Chaparro.....................................................................29 NC-140 Multi-State Research Project: Improving Economic and Environmental Sustainability in Tree-Fruit Production Through Changes in Rootstock Use – Winfred P. Cowgill, Jr., Wesley R. Autio, Emily E. Hoover, Richard Marini, and Paul A. Domoto........................................................................................34 Effect of Precocious Grapevine Fruiting on Subsequent Year’s Growth and Yield – Eric T. Stafne,