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R. Fjellstrom and D.E. Parfitt

RFLP probes were developed to determine the degree of genetic diversity both within and between 12 walnut species (Juglans spp.), including the widely cultivated English walnut (J. regia). One to three kilobase DNA fragments from Pst I digested J. regia nuclear DNA were cloned using the vector pUC18. Inserts corresponding to low copy number walnut genomic sequences were used to assess the genetic variability among walnut species. Extensive polymorphism was found between species and limited polymorphism within species. The inheritances of the RFLP loci are being analyzed to provide a genetic basis for the polymorphisms detected and to establish a RFLP based linkage map in walnuts

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Sara Melito, Angela Fadda, Emma Rapposelli, and Maurizio Mulas

( Mulas, 2012 ; Mulas et al., 2002 ). Germplasm genetic identification and characterization is an important step for the conservation and the use of plant genetic resources. DNA-based markers have been widely used to assess the genetic diversity of plant

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Jie Fu, Qiaoyan Xiang, Xianbao Zeng, Mei Yang, Ying Wang, and Yanling Liu

cultivars by molecular methods is necessary. In recent years, the rapid development of molecular marker technologies and DNA fingerprinting analysis has provided new techniques to assess the genetic diversity of plants and animals such as random amplified

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Jacob Mashilo, Hussein Shimelis, Alfred Odindo, and Beyene Amelework

for desired traits, which relies on the available genetic diversity ( Smith et al., 1991 ). Phenotypic markers have been used to characterize and evaluate bottle gourd genetic resources, which employed various descriptor lists of morphoagronomic traits

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P. Escribano, M.A. Viruel, and J.I. Hormaza

/tolerance to fruit flies of the genera Ceratitis MacLeay and Anastrepha Schiner. Increasing concerns on reduced levels of genetic diversity in crop species ( Esquinas-Alcazar, 2005 ; Tanksley and McCouch, 1997 ) have led to the need to preserve as much

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Mozhgan Zangeneh and Hassan Salehi

. tazetta is primarily found in Spain and northern Africa, as well as in a narrow band within China and Japan. The development of effective conservation and management strategies requires a thorough understanding of the genetic diversity and relationships

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Shuiming Zhang, Zhongshan Gao, Changjie Xu, Kunsong Chen, Guoyun Wang, Jintu Zheng, and Ting Lu

appearance, flavor, and mouth feel ( Joyce, 2007 ; Karp, 2007 , 2008 ). Chinese bayberry is a fruit with a long cultivation history of over 2000 years, but with only a three-decade-long research history. Its genetic diversity is far from being well

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Laura Rodriguez-Uribe, Luz Hernandez, James P. Kilcrease, Stephanie Walker, and Mary A. O’Connell

carotenoid pathways. Genetic diversity in landraces of Capsicum in Mexico ( Aguilar-Melendez et al., 2009 ; Gonzalez-Jara et al., 2011 ; Pacheco-Olvera et al., 2012 ) and in Capsicum in home gardens in Guatemala ( Guzman et al., 2005 ) has been

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David Jesús Gil-Ariza, Iraida Amaya, José Manuel López-Aranda, José Federico Sánchez-Sevilla, Miguel Ángel Botella, and Victoriano Valpuesta

the analysis of population structure in polyploids. Only very recently was information on genetic diversity in F. virginiana and F. chiloensis populations provided ( Carrasco et al., 2007 ; Hokanson et al., 2006 ). This is most likely the result

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Emmanouil N. Tzitzikas, Antonio J. Monforte, Abdelhak Fatihi, Zacharias Kypriotakis, Tefkros A. Iacovides, Ioannis M. Ioannides, and Panagiotis Kalaitzis

secondary centers of diversity. Apart from the significant amount of genetic variability observed among melon germplasm, occidental modern melon cultivars have a relatively narrow genetic base because they belong to a limited number of varietas (mainly