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PCR primed with minisatellite core sequences yields DNA fingerprinting probes in wheat

PCR primed with minisatellite core sequences yields DNA fingerprinting probes in wheat

Theoretical and applied genetics 95(1-2): 276-283

Four minisatellite core sequences were used as primers in a polymerase chain reaction (PCR) technique, known as the directed amplification of minisatellite-region DNA (DAMD), to detect polymorphisms in three pairs of hexaploid/tetraploid wheat cultivars. In each pair, the tetraploid cultivar (genomic formula AABB) was extracted from its corresponding hexaploid (genomic formula AABBDD) parent. Reproducible profiles of the amplified products revealed characteristic bands that were present only in the hexaploid wheats but not in their extracted tetraploids. Some polymorphisms were observed among the hexaploid cultivars. Twenty-three DAMD-PCR amplified fragments were isolated and screened as molecular probes on the genomic DNA of wild wheat species, hexaploid wheat and triticale cultivars. Subsequently, 8 of the fragments were cloned and sequenced. The DAMD-PCR clones revealed various degrees of polymorphism among different wild and cultivated wheats. Two clones yielded individual-specific DNA fingerprinting patterns which could be used for species differentiation and cultivar identification. The results demonstrated the use of DAMD-PCR as a tool for the isolation of informative molecular probes for DNA fingerprinting in wheat cultivars and species.

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Accession: 002914435

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DOI: 10.1007/s001220050560

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