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Warren F. Lamboy and Christopher G. Alpha

proprietary product does not constitute an endorsement or recommendation for use by the USDA. We are grateful to John Bowers and Carole Meredith of the Univ. of California, Davis, for providing primer sequences and amplification protocols and for fruitful

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Jaeho Yoon, Dongcheng Liu, Wonseob Song, Weisheng Liu, Aimin Zhang, and Shaohua Li

The genetic relationships among 96 peach and nectarine [Prunus persica (L.) Batsch.] genotypes and botanical varieties originating from different ecogeographical regions of China, Japan, North America, and South Korea were evaluated with 33 SSR markers screened from 108 published SSR markers developed for peach or sweet cherry (P. avium L.). The 33 SSRs detected polymorphisms among 96 genotypes and revealed a total of 283 alleles with an average of 8.6 alleles per locus. The polymorphism information content (PIC) value ranged from 0.40 (BPPCT041) to 0.98 (BPPCT009) with an average of 0.80. Unweighted pair group method average (UPGMA) cluster analysis based on Nei's genetic distances classified genotypes into six groups, corresponding to their ecogeographical origin. Group I consisted of northern Chinese and northwestern Chinese local cultivars, and was divided into two subgroups, white and yellow peaches. Group II contained mainly southern Chinese local, Japanese, and North American cultivars and can be divided into four subgroups: Japanese white, Chinese flat, North American yellow, and some Chinese local ornamental peach cultivars. Groups III, IV, and V were comprised of Chinese local ancient cultivars, and contained `Xinjiangdatianren' and `Renmiantao', Chinese dwarf cultivars, and `Fenshouxing', respectively. Group VI had only `Baishanbitao', a Chinese ornamental cultivar. Northern and northwestern Chinese local cultivars clustered together with a greater diversity than southern Chinese local cultivars, indicating that the northern and northwestern Chinese local cultivars are similar ecotypes, and southern Chinese local cultivars are a subset of the northern Chinese group. Moreover, the Japanese and North American genotypes had a close phylogenetic relationship with southern Chinese local cultivars. The taxonomic placement of P. ferganensis (Kost. et Kiab) Kov. et Kost. and the phylogenetic relationship of `Baishanbitao' with peaches are discussed.

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A. Levi and L.J. Rowland

Fifteen highbush (or highbush hybrid) blueberry cultivars (Vaccinium corymbosum Linnaeus), two rabbiteye blueberry cultivars (V. ashei Reade), and one southern lowbush (V. darrowi Camp) selection from the wild were examined using seventeen 10-base RAPD and seven 15- to 18-base SSR-anchored primers (primers comprised of SSR motifs) in polymerase chain reactions (PCRs). Fifteen RAPD and three SSR markers resulting from these reactions were chosen to construct a DNA fingerprinting table to distinguish among the genotypes included in this study. Similarity values were calculated based on 132 RAPD and 51 SSR bands, and a dendrogram was constructed based on the similarity matrix. The V. ashei cultivars and V. darrowi selection grouped out separately from the V. corymbosum cultivars as expected. However, estimates of relative genetic similarity between genotypes within the V. corymbosum group did not agree well with known pedigree data and, thus, indicated that RAPD and SSR data did not accurately assess the genetic relationships of cultivars within this species.

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Maomao Ding, Ke Wang, Wenting Wang, Miaojin Chen, Dajun Wu, Changjie Xu, and Kunsong Chen

sequences deposited in GenBank. Development and validation of EST-SSR markers. A total of 49 EST-SSR markers, including 24 simple and 25 compound repeat sequences, with relatively low repeat numbers of motifs, were selected from the tri, tetra-, penta-, hexa

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Michael Dossett, Jill M. Bushakra, Barbara Gilmore, Carol A. Koch, Chaim Kempler, Chad E. Finn, and Nahla V. Bassil

by simple sequence repeat markers Genet. Resources Crop Evol. 2012 1849 1865 Dossett, M. Kempler, C. Daubeny, H. 2013 BC 90-19-34 and BC 93-16-43 red raspberries HortScience 48 664 667 Folmer, F. Basavaraju, U. Jaspars, M. Hold, G. El-Omar, E. Dicato

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Cunquan Yuan, Zhiyi Qu, Huitang Pan, Tangren Cheng, Jia Wang, and Qixiang Zhang

reverse primer pair sequences, simple sequence repeat (SSR) type, annealing temperature (Tm), and length of the 28 polymorphic expressed sequence tag–SSR markers that were used for bulked segregant analysis in Primula forbesii . The percentage of the

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Raúl De la Rosa, Angjelina Belaj, Antonio Muñoz-Mérida, Oswaldo Trelles, Inmaculada Ortíz-Martín, Juan José González-Plaza, Victoriano Valpuesta, and Carmen R. Beuzón

end of the read. Fig. 1. Workflow of the express sequence tag–simple sequence repeat (SSR) mining process on olive cDNA genomic libraries. Sequences containing SSR are identified using MISA software [Institute of Plant Genetics and Crop Plant Research

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Ke Cao, Lirong Wang, Gengrui Zhu, Weichao Fang, Chenwen Chen, and Pei Zhao

heterozygous for the trait and those susceptible were coded as homozygous recessives. The segregation ratio 87R:103S was close to 1R:1S expected from the PkMi (chi-square = 1.35; threshold value = 3.84 for P = 0.95). Simple sequence repeat analysis. The 134

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Min Fan, Yike Gao, Yaohui Gao, Zhiping Wu, Hua Liu, and Qixiang Zhang

), pentanucleotide (0.13%, 6), and hexanucleotide repeat motifs (0.09%, 4) ( Table 1 ). Table 1. Summary of expressed sequence tag–simple sequence repeat (EST-SSR) markers identified in the chrysanthemum transcriptome. The frequency distribution of 35 major types

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Karen Harris-Shultz, Melanie Harrison, Phillip A. Wadl, Robert N. Trigiano, and Timothy Rinehart

). Simple sequence repeat markers, or microsatellites, are repeating DNA sequences of one to six nucleotides that are found in coding and non-coding regions of the genome ( Toth et al., 2000 ). SSR markers, including expressed sequence tag markers, have a