caa a22 4500 475795393 CHVBK 20180406123722.0 cr unu---uuuuu 170329e20000201xx s 000 0 eng 10.1007/s001220050079 doi (NATIONALLICENCE)springer-10.1007/s001220050079 The Q locus of Iranian and European spelt wheat [Elektronische Daten] [M. C. Luo, Z. L. Yang, J. Dvořák] Abstract : 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. Springer-Verlag Berlin Heidelberg, 2000 Key words Triticum nationallicence Hexaploid nationallicence Mapping nationallicence RFLP nationallicence RSL nationallicence Spelt nationallicence Luo M. C. Department of Agronomy and Range Science, University of California, One Shields Avenue, Davis, California 95616, USA, US aut Yang Z. L. Department of Agronomy and Range Science, University of California, One Shields Avenue, Davis, California 95616, USA, US aut Dvořák J. Department of Agronomy and Range Science, University of California, One Shields Avenue, Davis, California 95616, USA, US aut https://doi.org/10.1007/s001220050079 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s001220050079 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Luo M. C. Department of Agronomy and Range Science, University of California, One Shields Avenue, Davis, California 95616, USA, US aut NATIONALLICENCE 700 1- Yang Z. L. Department of Agronomy and Range Science, University of California, One Shields Avenue, Davis, California 95616, USA, US aut NATIONALLICENCE 700 1- Dvořák J. Department of Agronomy and Range Science, University of California, One Shields Avenue, Davis, California 95616, USA, US aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer