Construction and characterisation of a yeast artificial chromosome library containing five haploid sugarbeet (Beta vulgaris L.) genome equivalents |
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| Authors: | J Del-Favero M Vauterin G Weyens K E Edwards M Jacobs |
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| Institution: | (1) Instituut voor Moleculaire Biologie, Paardenstraat 65, 1640 Sint-Genesius-Rode, Belgium;(2) Zeneca Seeds, Plant Biotechnology Section, Jealott's Hill Research Station, RG12 6EY Bracknell Berks, UK;(3) Present address: ICI Seeds-SES, Industriepark 15, 3300 Tienen, Belgium |
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| Abstract: | A yeast artificial chromosome (YAC) genomic library of Beta vulgaris was constructed in the pYAC4 vector. High-molecular-weight DNA was prepared from agarose-embedded leaf protoplasts from a triploid cultivar. The library was found to contain 33,500 clones in an ordered array of microtiter plates. Mean size of the inserts was estimated to be 135 kb, and the library should therefore represent the equivalent of five haploid genomes. The library was characterised for the presence of highly repetitive, chloroplast and single-copy sequences. In order to isolate single-copy sequences, 18 pools of DNA, each from 1920 individual YAC clones, were prepared for rapid screening of the library by the polymerase chain reaction. The results of these screenings showed that the number of isolated clones was at or near the frequency expected. |
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| Keywords: | Beta vulgaris Polymerase chain reaction Yeast artificial chromosome library Genome mapping Restriction fragment length polymorphism |
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