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GrainGenes Reference Report: TAG-100-602

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Reference	TAG-100-602
Title	The Q locus of Iranian and European spelt wheat
Journal	Theoretical and Applied Genetics
Year	2000
Volume	100
Pages	602-606
Author	Luo MC Yang ZL Dvorak J
Abstract	Summary: A dominant allele at the Q locus on chromosome 5A is believed to be the principal factor responsible for free-threshing, square-head spikes with a non-fragile rachis in bread wheat, Triticum aestivum ssp. aestivum. The spelt syndrome, resulting in pyramidal spikes with a brittle rachis and hulled grain in T. aestivum, is believed to be principally caused by the q allele. Chromosome 5A of European and Iranian spelt was substituted for 5A of bread wheat and the lines were characterized with molecular markers. The substitution of bread wheat chromosome 5A by 5A of European spelt resulted in weakly hulled, pyramidal spikes with a non-brittle rachis, whereas and the substitution of 5A by 5A of Iranian spelt did not alter spike morphology at all. It is concluded that the expression of the spelt syndrome depends, to a large extent, on the interactions of q with genes controlling glume tenacity and rachis fragility on other chromosomes. The genetic basis for the spelt syndrome and the apparent presence of the Q allele in Iranian spelt are discussed
External Databases	https://doi.org/10.1007/s001220050079
Gene	Q (Triticum)
Map Data	5A, DS 5AEurope
Keyword	[ Hide all but 1 of 42 ] 5a alleles animal bread bread wheat brittle rachis chromosome 5a chromosome maps europe gene genetic basis genetic mapping genetic polymorphism hexaploid hulled grain interspecific hybridization iran linkage maps loci locus map mapping marker molecular marker morphology plant morphology polymorphic loci polymorphism pyramidal spikes q allele quantitative traits rflp rsl spelt spelta spike substitution syndrome triticum triticum aestivum triticum aestivum subsp triticum spelta

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