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January 2017 Number 1
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: . 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:
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:
Society Web Site:
Volume 71
CONTENTS
Small Genomes in Tetraploid Rubus L. (Rosaceae) from New Zealand and Southern
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,
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