Abstract
An improved procedure is presented to select clones from a tomato yeast artificial chromosome (YAC) library. The procedure is based exlcusively on the polymerase chain reaction (PCR). We combined DNA from approximately 36,000 YAC clones in pools containing 96-single YAC clones from one master plate and further in super pools representing 10 master plates. This pooling strategy allows the selection of single YAC clones homologous to a target sequence after three rounds of PCR using super pools, single pools, and single YAC clones as a template. Single YAC clones were spheroplasted prior to the third PCR round in order to omit the conventional radioactive colony hybridization step. To date, we applied this PCR-based selection strategy to isolate clones homologousto ten different sequence-tagged sites (STS) that are linked to genes targeted for map-based cloning. The selection of YAC clones can be readily accomplished within three days. The PCR-based screening strategy is easy to set up and contributes to a further acceleration of the construction of YAC contigs.
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Pillen, K., Alpert, K.B., Giovannoni, J.J. et al. Rapid and reliable screening of a tomato YAC library exclusively based on PCR. Plant Mol Biol Rep 14, 58–67 (1996). https://doi.org/10.1007/BF02671903
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DOI: https://doi.org/10.1007/BF02671903