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Zhanao Deng, Fahrettin Goktepe, Brent K. Harbaugh, and Jinguo Hu

cultivars accounted for >95% of the acreage used in tuber production ( Bell et al., 1998 ; Deng et al., 2005c ). As a result, there is increasing concern over the loss of genetic diversity in caladium via loss of cultivars. Similar concerns have been raised

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Njung’e Vincent Michael, Pamela Moon, Yuqing Fu, and Geoffrey Meru

genetic basis of crown rot resistance in these accessions that would inform breeders of best strategies for accumulating diverse disease resistance alleles through gene pyramiding is currently lacking. In addition, information on the genetic diversity

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Vanina Cravero, Eugenia Martín, and Enrique Cointry

( Sonnante et al., 2002 ). An understanding of the magnitude and patterns of genetic diversity in crop plants has important implications for breeding programs and for conservation of genetic resources. Estimating the level of genetic diversity is of

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Haiying Zhang, Jianguang Fan, Shaogui Guo, Yi Ren, Guoyi Gong, Jie Zhang, Yiqun Weng, Angela Davis, and Yong Xu

, most breeding programs have relied on the use of established cultivars or elite breeding lines, which resulted in lower genetic diversity within cultivated watermelon, impeding progress of watermelon breeding efforts ( Levi et al., 2004 ). It has been

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Isabelle Y. Delannay, Jack E. Staub, and Jin Feng Chen

The genetic diversity of cucumber [ C. sativus (2n = 2x = 24)] market types and exotic germplasm (i.e., PIs) has been well documented and found to be extremely narrow [3%–8% polymorphisms among elite and exotic germplasm and 12% between botanical

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Şurhan Göl, Sami Doğanlar, and Anne Frary

and climate requirements. Germplasm and landrace diversity has arisen due to soil, climatic, cropping, and use differences among regions and farmers ( Ernesto, 1992 ). However, genetically variable traditional varieties are being replaced by a few

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Nader R. Abdelsalam, Rehab M. Awad, Hayssam M. Ali, Mohamed Z.M. Salem, Kamal F. Abdellatif, and Mohamed S. Elshikh

habitat as the result of by human activity. However, human intervention is needed to ensure species survival ( Volis, 2016 ). It has been proven that DNA-based markers are successful in assessing genetic diversity and in classifying plants ( Zhou et al

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Wanmei Jin, Qiang Zhang, Sunzhong Liu, Qinping Wei, Wanmei Jin, Zongming Cheng, Xiaohui Xue, and Tingzhen Yang

( Benora et al., 2008 ; Cantini et al., 2008 ; Wang et al., 2011 ). SSR marker technology is an ideal molecular tool for analysis of genetic diversity because of its stability, transferability, ease of performance, and its locus richness ( Benora et al

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David M. Czarnecki II, Madhugiri Nageswara Rao, Jeffrey G. Norcini, Frederick G. Gmitter Jr, and Zhanao Deng

ecotype or source-identified seeds) are more genetically and phenotypically diverse than accessions of that species that have been subjected to a selection process ( Hilker and Jurgenson, 2003 ). Broader genetic diversity estimates of ecotypes will

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Xinwang Wang, Phillip A. Wadl, Cecil Pounders, Robert N. Trigiano, Raul I. Cabrera, Brian E. Scheffler, Margaret Pooler, and Timothy A. Rinehart

single population, localized to one island in Japan. Therefore, most crapemyrtle breeding programs seek new genetic combinations by crossing existing cultivars to create new combinations of ornamental traits. Genetic diversity estimates are critical for