Molecular cytogenetic characterization and SSR marker analysis of a leaf rust resistant wheat line carrying a 6G(6B) substitution from Triticum timopheevii (Zhuk.)

作者: Andrea Uhrin , Éva Szakács , László Láng , Zoltán Bedő , Márta Molnár-Láng

DOI: 10.1007/S10681-011-0483-1

关键词: Repeated sequenceChromosomal translocationGeneticsPowdery mildewBiologyFluorescence in situ hybridizationChromosomeTriticum timopheeviiGenomeMicrosatellite

摘要: A disease (powdery mildew, leaf rust) resistant line was selected from the progenies of a Triticum aestivum × Triticum timopheevii amphiploid produced at Martonvasar. This previously identified with C-banding as 6G(6B) substitution. In order to detect 6G chromosome in wheat background, fluorescence situ hybridization (FISH) and microsatellite marker analysis were used. Ten markers 43 tested generated PCR products that polymorphic between chromosomes 6B 6G, four showed length-polymorphism. The FISH pattern T. using combination repetitive DNA probes (Afa-family, pSc119.2, pTa71, (GAA)7). Genomic (GISH) technique, capable labelling At G genomes separately, used on same slides differentiate timopheevii. grouped basis GISH patterns cyclic intergenomic translocation involving 6At-1G-4G detected accession TRI667. presence substitution demonstrated probes. Chromosome clearly its different parental cultivar Fleischmann-481. According field tests, has resistance rust.

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