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Jian-Feng Geng, Cheng-Song Zhu, Xiao-Wei Zhang, Yan Cheng, Yuan-Ming Zhang, and Xi-Lin Hou

increase the selection efficiency. Genetic linkage maps that are essential to the detection of QTL and other applications have been constructed for nearly all economically important plants. Although there are a number of genetic maps reported in B. rapa

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Karen R. Harris-Shultz, Brian M. Schwartz, Wayne W. Hanna, and Jeff A. Brady

framework genetic linkage map has been constructed based on single-dose restriction fragments (SDRFs) ( Bethel et al., 2006 ). SDRFs or alternatively single-dose amplification fragments markers ( Stein et al., 2007 ) are present as a single copy on a single

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Eder J. Oliveira, Maria Lucia C. Vieira, Antonio Augusto F. Garcia, Carla F. Munhoz, Gabriel R.A. Margarido, Luciano Consoli, Frederico P. Matta, Michel C. Moraes, Maria I. Zucchi, and Maria Helena P. Fungaro

inbred lines, like F 2 , BC 1 , or RILs. For this reason, yellow passion fruit linkage maps were generally constructed using a strategy known as two-way pseudo-testcross ( Grattapaglia and Sederoff, 1994 ), based on monoparental dominant markers

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Jack E. Staub, Zhanyong Sun, Sang-Min Chung, and Richard L. Lower

Genetic linkage mapping has historically been the basis for genomic investigation and the analysis of quantitative trait loci (QTL) ( Doerge, 2002 ). The construction of a detailed linkage map is, in fact, the initial step for the use of genetic

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Soon O. Park, Hye Y. Hwang, and Kevin M. Crosby

bp ( Arumuganathan and Earle, 1991 ); genetic polymorphism ranges from 10% to 15% ( Staub et al., 1997 ) and genomic length is 2276 to 3250 cM ( Staub and Meglic, 1993 ). Pitrat (1991) developed a classical melon linkage map consisting of 28

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Prashant Bhandari and Tong Geon Lee

have made it possible to create genetic maps and exploit genetic linkage between markers and traits with unprecedented resolution. For example, SNPs identified by high-throughput sequencing serve as markers of the associations between genotypes and

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Amnon Levi and Claude E. Thomas

ancestors ( Levi et al., 2001a , 2001b ). A set of DNA markers representing different linkage regions of the watermelon genome and producing sufficient polymorphism among genotypes is needed in breeding programs aiming to produce elite triploid (seedless

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Yiqun Weng, Shanna Johnson, Jack E. Staub, and Sanwen Huang

availability of the whole genome sequence in cucumber provides a platform for the development of codominant markers ( Huang et al., 2009 ). A high-resolution simple sequence repeat (SSR)-based linkage map was developed using the recombinant inbred line (RIL

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Gehendra Bhattarai and Shawn A. Mehlenbacher

, we mined the ‘Jefferson’ genome sequence to develop new polymorphic SSR markers with repeat motifs of 4, 5, or 6 bp and further saturated the reference hazelnut genetic linkage map. Materials and Methods Plant material. A set of 48 diverse hazelnut

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Johanne C. Cousineau and Danielle J. Donnelly

The inheritance of five isoenzymes was studied in red and purple raspberry F1 progenies (Rubus idaeus L. and Rubus × neglectus Peck). Isocitrate dehydrogenase (IDH; EC 1.1.1.42) was a dimeric enzyme present in the cytosol and coded for by one locus (Idh-1). Three of the four crosses analyzed at this locus had deviations from expected ratios, possibly caused by its linkage to a recessive lethal gene. Malate dehydrogenase (MDH; EC 1.1.1.37), phosphoglucoisomerase (PGI; EC 5.3.1.9), and triose phosphate isomerase (TPI; EC 5.3.1.1) were dimeric enzymes with two loci. Each of these three enzymes was present in an organelle and in the cytosol for locus 1 and 2, respectively. Phosphoglucomutase (PGM; EC 2.7.5.1) was monomeric with two loci, Pgm-1 and Pgm-2, located in an organelle and the cytosol, respectively. Each allele at Pgm-1 resulted in the formation of two bands. Although most progenies analyzed supported Mendelian inheritance of polymorphic loci (except for Idh-1), there was a higher than expected number of aberrant segregation ratios observed (18.4%). Analysis of 85 pairs of jointly segregating loci revealed a possible linkage group consisting of Mdh-2, Tpi-2, and Pgm-1.