Genome diversity and gene haplotypes in the grapevine (<Emphasis Type="Italic">Vitis vinifera</Emphasis> L.), as revealed by single nucleotide polymorphisms |
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Authors: | Marzia?Salmaso Giorgia?Faes Cinzia?Segala Marco?Stefanini Ilkhom?Salakhutdinov Eva?Zyprian Reinhard?Toepfer M?Stella?Grando Email author" target="_blank">Riccardo?VelascoEmail author |
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Institution: | (1) Istituto Agrario San Michele all Adige, via Mach 1, I-38010 San Michele a/A (TN);(2) Federal Centre of Breeding Research on Cultivated Plants, Institute for Grapevine Breeding Geilweilerhof, D-76833 Siebeldingen;(3) Dept. of Environmental Agronomy and Crop Production, University of Padova, Agripolis, I-35020 Legnaro (PD);(4) Dept. of Plant Production, University of Udine, via delle Scienze 208, I-33100 Udine |
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Abstract: | EST (expressed sequence tags) sequencing, SNP (single nucleotide polymorphisms) development and haplotype assessment are powerful tools for the support of marker-assisted selection. The grapevine genome is currently being scavenged in our laboratory using an EST-SNP approach. Nine parental genotypes, used to create five inter- or intra-specific hybrids, have been tested to evaluate the degree of polymorphism between Vitis vinifera, Vitis riparia and a further intraspecific hybrid, measuring their nucleotide diversity. The SNPs were analysed on cDNA sequences of 4 functional classes of genes based on homology with genes present in a public database: sugar metabolism, cell signalling, anthocyanin metabolism and defence related. Primer pairs were deduced and used to amplify corresponding genomic sequences. Almost 12,000 bp of DNA have been scanned revealing differences among genotypes of up to 247 SNPs, with the highest rate of one SNP occurring every 78 bp when clones of different Vitis species are compared. Re-sequencing allowed the definition of haplotypes in the nine genotypes studied and these were confirmed by analysing segregating populations. The efficiency of SSCP, in comparison with re-sequencing, was considered for 25 gene fragments of the same 9 genotypes.these two authors contributed equally to this work |
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Keywords: | Grape ESTs Haplotypes Re-sequencing SNP development SSCP |
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