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GrainGenes Reference Report: GNM-44-628

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Reference	GNM-44-628
Title	Microsatellite markers reveal chimeric origin of redesignated chromosome 4A of wheat from Triticum urartu and other species
Journal	Genome
Year	2001
Volume	44
Pages	628-632
Author	Vasu K Aghaee-Sarbarzel MS Dhaliwal HS
Abstract	Summary: Although a new nomenclature has been adopted for wheat in which chromosome 4A (4A(O)) has been renamed 4B (4B(N)) and chromosome 4B (4B(O)) has been renamed 4A (4A(N)), their specific origin remains uncertain. The use of wheat microsatellite (WMS) markers mapped to chromosomes 4A(N) and 4B(N) in a set of polyploid wheats and diploid genome donors has unequivocally indicated that the entire short arm of 4A(N), some part of 4A(N)L, and a segment of 4B(N)L were derived from Triticum urartu. The presence of a T. urartu-specific allele at locus gwm368 on 4B(N)L and of an Aegilops speltoides allele at locus gwm397 on 4A(N)L suggests the possibility of a reciprocal translocation between 4A(N)L and 4B(N)L. The subcentromeric and telomeric regions of 4A(N)L corresponding to heterochromatic C-bands were derived neither from diploid wheats nor from Ae. speltoides or Aegilops longissima
Keyword	[ Hide all but 1 of 28 ] aegilops aegilops speltoides bread wheat c-bands canada chromosome chromosome 4a differentiation diploid wheat evolution genetic genome genome donor locus marker microsatellite microsatellite marker nomenclature nor origin polyploid polyploid wheats reciprocal translocation speltoides translocation triticum triticum urartu wheat

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