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Free access

Arthur Villordon and Jason Franklin

Shape measurements in horticultural research have generally been expressed as ratios or indexes. Computer-based image analysis enables the objective quantification and statistical analysis of two-dimensional sample shape variability. In addition, the availability of public domain software facilitates the inexpensive but accurate quantification of object shape in horticultural research. We describe the procedures for measuring sample shape using the following publicly available software: ImageJ, ImageTool, and SHAPE. Using U.S. #1 sweetpotato storage root samples from plots subjected to various weed control treatments, we detected significant differences in elongation, compactness, as well as shape attributes. We also measured size and shape variability from representative fruit, leaf, and floral organ samples. The results demonstrate that, where possible, measurement of two-dimensional samples can be undertaken inexpensively and accurately using public domain software applications.

Free access

Arthur Villordon, Wambui Njuguna, Simon Gichuki, Philip Ndolo, Heneriko Kulembeka, Simon Jeremiah, Don LaBonte, Bernard Yada, Phinehas Tukamuhabwa, and Robert Mwanga

Web-based information delivers real-time or near-real-time data to clientele and other stakeholders. Although proprietary methods are available for interactively searching and updating databases through web interfaces, these methods generally require varying costs to maintain licensing agreements. The availability of publicly available software that require minimal or flexible licensing costs provide a cost-effective alternative to institutions that are considering access to databases via a web-accessible interface. For example, if a current web server is already configured to support hypertext preprocessor (PHP) scripts and MySQL databases, all that needs to be installed is a form script to allow the searching, inserting, and deleting of records. We describe procedures, software, and other applications that we used to develop a publicly accessible web interface to an experimental database of representative sweetpotato accessions in Kenya. The web address of this database is http://www.viazivitamu.org. This site also contains links to sweetpotato collection sites in Kenya, Tanzania, and Uganda graphically shown using a public domain GIS viewer. This demonstrates that public domain web-based tools can be configured not only to support collaborative activities among researchers in various locations, but also to provide relevant data to clients and other stakeholders.

Open access

Mark K. Ehlenfeldt

released as a public domain cultivar. Origin and Description ‘Talisman’ originated from a cross of ‘Magnolia’ × ‘Elizabeth’ ( Fig. 1 ), and it was tested as ARS 05-171. ‘Magnolia’ is a southern highbush cultivar ( USDA, 1994 ) and derives from the cross Fla

Free access

Gary W. Stutte and Elizabeth C. Stryjewski

Manual methods for estimating root length are tedious and time-consuming. Image capture and analysis systems can be used to obtain precise measurements of root length and growth angle. Root activity can also be determined through analysis of the mean pixel intensity of a digitized image. Both commercial (the IBM-compatible ICAS System) and public domain (the Macintosh-based NIH Image) image capture and analysis software have been used to analyze intact root systems. Examples of ICAS classification of hydroponic and soil-grown root systems will be presented. Advantages of the NIH Image software for analysis of micro-gravity experiments aboard the Space Shuttle will be discussed.

Free access

A. Villordon, S. Gichuki, H. Kulembeka, S.C. Jeremiah, and D. Labonte

One of the secondary centers of genetic diversity for the sweetpotato [Ipomoea batatas (L.) Lam.] is located in Africa. We have developed a geo-referenced database of sweetpotato accessions for Tanzania and Kenya that is accessible by stakeholders and other users. Public domain base maps and other files were used to generate the underlying GIS components. DIVA-GIS was used to convert existing spreadsheet-based accession and passport data into GIS-compliant files. ALOV Map, a public domain Java application for publishing vector and raster maps, was used to provide the framework for a web-accessible GIS database. This demonstrates that the availability of publicly available software requiring minimal or flexible licensing costs provide a cost-effective alternative to institutions that are considering developing GIS databases as well as enabling web accessibility to such resources. DIVA-GIS was also used to predict potential distribution of sweetpotato germplasm in Sub-Saharan Africa using the built-in ecological niche modelling tool. We describe procedures, software, and other applications that we used to develop a publicly accessible web interface to a GIS database of sweetpotato germplasm collections in Kenya and Tanzania.

Full access

Ebrahiem Babiker, Stephen J. Stringer, Hamidou F. Sakhanokho, John J. Adamczyk Jr., and Arlen D. Draper

as alternative to conventional landscapes. ‘Muffin Man’ is a new public-domain, edible ornamental rabbiteye blueberry cultivar developed by the U.S. Department of Agriculture (UDSA), Agricultural Research Service (ARS) Thad Cochran Southern

Free access

Stephen J. Stringer, Arlen D. Draper, James M. Spiers, Donna A. Marshall, and Barbara J. Smith

’ propagates readily from softwood cuttings taken from new growth in late spring or late summer and from hardwood cuttings taken in the winter and through micropropagation. Availability ‘Pearl’ is a public domain blueberry cultivar developed by the USDA

Free access

Thomas G. Beckman, Jose X. Chaparro, and Wayne B. Sherman

established. Compatibility was poor when grafted with ‘Non Pareil’ or ‘Mission’ almond scions and also with the apricot selection CVN5A. Availability ‘Sharpe’ has been released in the public domain. Neither the USDA-ARS nor the University of Florida

Free access

Stephen J. Stringer, Donna A. Marshall, and Dennis J. Gray

‘Eudora’, a purple-fruited muscadine grape ( Vitis rotundifolia Michx.) intended for the fresh market, has been approved for joint release as a public domain cultivar by the University of Florida Experiment Station and the USDA-ARS ( Fig. 1

Free access

Stephen J. Stringer, Arlen D. Draper, Donna A. Marshall, and James M. Spiers

the gulf coast region (i.e., ‘Star’ and ‘Sante Fe’) and the earliest ripening rabbiteye blueberry cultivars (i.e., ‘Alapaha’, ‘Climax’, and ‘Prince’). Availability ‘Gupton’ is a public domain blueberry cultivar and a limited supply of rooted cuttings