Query (optional)   in Class  All Allele Author Colleague Collection Assembly Gene Gene Class Gene Product Germplasm Image Journal Keyword Library Locus Map Map Data Marker Pathology Polymorphism Probe Protein QTL Rearrangement Reference Sequence Species Trait Trait Study Two Point Data  

---

GrainGenes Reference Report: GNM-51-589

[Submit comment/correction]

Reference	GNM-51-589
Title	Loss of 5S rDNA units in the evolution of Agropyron, Pseudoroegneria, and Douglasdeweya.
Journal	Genome
Year	2008
Volume	51
Pages	589-598
Author	Baum BR Edwards T Johnson DA
Abstract	We have investigated relationships among the three closely related genera Agropyron, Pseudoroegneria, and Douglasdeweya. Based upon grouping of 330 5S rDNA sequences into unit classes, we found that Douglasdeweya, with the genomic constitution PPStSt, has 2 unit classes, the long P1 and short S1, and Pseudoroegneria, with the genomic constitution StSt or StStStSt, has the long S1 and short S1 unit classes. In contrast, only the long P1 unit class was found in species of the genus Agropyron (PP). Having a single unit class is unique among all the genera of the tribe Triticeae investigated so far and may reflect gene loss or lineage sorting during its genesis. The presence of the short S1 and long P1 unit classes confirms the amphiploid origin of Douglasdeweya.
External Databases	http://dx.doi.org/10.1139/g08-045

GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.