Flow Sorting and Molecular Cytogenetic Identification of Individual Chromosomes of Dasypyrum villosum L. H. villosa by a Single DNA ProbeReport as inadecuate




Flow Sorting and Molecular Cytogenetic Identification of Individual Chromosomes of Dasypyrum villosum L. H. villosa by a Single DNA Probe - Download this document for free, or read online. Document in PDF available to download.

Dasypyrum villosum L. Candargy sin. Haynaldia villosa is an annual wild diploid grass species 2n = 2x = 14; genome VV belonging to the Poaceae family, which is considered to be an important source of biotic and abiotic stress resistance genes for wheat breeding. Enhanced characterization of D. villosum chromosomes can facilitate exploitation of its gene pool and its use in wheat breeding programs. Here we present the cytogenetic identification of D. villosum chromosomes on slide by fluorescent in situ hybridization FISH, with the GAA simple sequence repeat SSR as a probe. We also describe the isolation and the flow cytometric analysis of D. villosum chromosomes in suspension, resulting in a distinguished flow karyotype. Chromosomes were flow sorted into three fractions, according their DNA content, one of which was composed of a single type of chromosome, namely 6 V, sorted with over 85% purity. Chromosome 6 V is known to carry genes to code for important resistance and seed storage characteristics, and its isolation represents a new source of genetic traits and specific markers useful for wheat improvement.



Author: Valentina Grosso, Anna Farina, Andrea Gennaro, Debora Giorgi, Sergio Lucretti

Source: http://plos.srce.hr/



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