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Cristina Zambrana-Echevarría, Lorriane De Jesús-Kim, Rocio Márquez-Karry, Dimuth Siritunga, and David Jenkins

-Figueroa, 2002 ) and lack of an effective control have limited papaya production in the island. Information about the genetic diversity of PR-PRSV population would benefit the development of a durable control strategy, such as a transgenic PRSV-resistant papaya

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Ishwarbhai C. Patel

Rutgers Urban Gardening (RUG) has established a physical, psychological, and emotional environment that fosters and sustains diversity. RUG enhances cultural diversity by employing an ethnic minority work force of six, reaching diverse audiences representing more than 30 ethnic groups, and offering a wide variety of educational programs. Urban gardening gives people an opportunity to meet others, share concerns, and solve problems together. It cuts across social, economic, cultural, and racial barriers, bringing together people of all ages and ethnic backgrounds.

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N. Nikoloudakis, G. Banilas, F. Gazis, P. Hatzopoulos, and J. Metzidakis

Random amplified polymorphic DNA (RAPD) markers were used to study the genetic diversity and to discriminate among 33 Greek olive (Olea europaea L.) cultivars. Three feral forms from Crete and five foreign cultivars recently introduced into Greece were also included. Nineteen primers were selected which produced 64 reproducible polymorphic bands in the 41 olive genotypes studied, with an average of 3.4 informative markers per primer. The RAPD markers resulted in 135 distinct electrophoretic patterns, with an average of 7.1 patterns per primer. Based on either unique or combined patterns, all genotypes could be identified. Genetic similarities between genotypes were estimated using the Dice similarity index and these indicated that a high degree of diversity exists within the Greek olive germplasm. Using the unweighted pair-group method (UPGMA) most cultivars were clustered into two main groups according to their fruit size or commercial use (table or olive oil). However, poor correlation was detected between clustering of cultivars and their principal area of cultivation. RAPD marker data were subjected to nonmetric multidimentional scaling (NMDS) which produced results similar to those of the UPGMA analysis. The results presented here contribute to a comprehensive understanding of cultivated Greek olive germplasm and provide information that could be important for cultural purposes and breeding programs.

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Joseph C. Kuhl and Veronica L. DeBoer

( Jubrael et al., 2005 ; Parks and Moyer, 2004 ; Parks et al., 2006 ). AFLP analysis has been shown to excel at estimating genetic diversity compared with morphological traits ( Roy et al., 2004 ). The objective of this study was to apply the AFLP

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D. Michael Jackson, Howard F. Harrison, Robert L. Jarret, and Phillip A. Wadl

is wide genetic and phenotypic diversity within the worldwide sweetpotato and Ipomoea germplasm collections for breeding efforts ( Gichuki et al., 2003 ; Jarret et al., 2019 ; Khoury et al., 2015 ; Su et al., 2017 ). Sweetpotato has high genetic

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Ambika B. Gaikwad, Tusar Kanti Behera, Anand K. Singh, Devanshi Chandel, Jawahir L. Karihaloo, and Jack E. Staub

diversity reduction) has been hastened by urban encroachment of agricultural lands and rapid displacement of old varieties and landraces with improved cultivars during efforts to increase production ( Harlan, 1975 ). India being a center of diversity of M

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Theodore J. Kisha and Christopher S. Cramer

The U.S. National Plant Germplasm System (NPGS) is one of the world's largest national genebank networks focusing on preserving the genetic diversity of plants by acquiring, preserving, evaluating, documenting, and distributing crop

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Melissa Steinhauer, M.A. Brennan, Dennis McConnell, Carrie Reinhardt-Adams, and David Sandrock

. Leu Gardens in Orlando, FL, was selected as the site for the display and visitor survey. This selection was based on the reasonable proximity to University of Florida, its high visitor rate, and the sociodemographic makeup/diversity of the region in

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Timothy A. Rinehart, Brian E. Scheffler, and Sandra M. Reed

have been identified (Glyn Church, personal communication). The objectives of this study were to examine ploidy levels of Dichroa selections, evaluate the genetic diversity within the available Dichroa germplasm, determine if naturally occurring

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Li-Qiang Tan, Xin-Yu Wang, Hui Li, Guan-Qun Liu, Yao Zou, Shen-Xiang Chen, Ping-Wu Li, and Qian Tang

populations are genetically polymorphic; therefore, they represent valuable genetic resources for breeding and diversity conservation. Actually, many elite clones that are widely used currently are selected from landraces ( Chen et al., 2007 ). Located in