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GrainGenes Reference Report: HDT-137-180

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Reference	HDT-137-180
Title	Comparative telosomic mapping of homoeologous genes for brittle rachis in tetraploid and hexaploid wheats
Journal	Hereditas
Year	2002
Volume	137
Pages	180-185
Author	Watanabe N Sugiyama K Yamagishi Y Sakata Y
Abstract	The brittle rachis character, which causes spontaneous shattering of spikelets, is of adaptive value in wild grass species. The genes for brittle rachis were mapped using aneuploid stocks in hexaploid wheat (Triticum aestivum L.) and durum wheat (Triticum turgidum L.) The gene for brittle rachis, Br1, from Tibetan weedraces of wheat was located on the short arm of chromosome 3D. The average distance from centromere was 20.6 cM. Br1 did not have any effects on glume hardness. Br2 and Br3 from T. dicoccoides Koern. were located on the short arms of chromosome 3A and 3B, respectively. The map distance of Br2 was 21.1 cM and that of Br3 was 20.1 cM. It has been thought that the brittle rachis was determined by the spelt gene, q. However the present study suggests that the genes on the homoeologous group 3 chromosomes commonly determine the brittle rachis in Triticeae. In accordance with the rule for the symbolization of genes in homoeologous sets, we propose to designate the group 3 brittle rachis genes, Br-A1, Br-B1 and Br-D1.
External Databases	https://doi.org/10.1034/j.1601-5223.2002.01609.x
Germplasm	KU510 KU511 KU515 R-61
Keyword	[ Hide all but 1 of 23 ] aneuploid centromere chromosome chromosome addition lines dicoccoides durum gene grass species group-3 hardness hexaploid hexaploid wheat map mapping shattering short arms spikelets tetraploid triticeae triticum triticum aestivum triticum turgidum wild

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