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: TAG-106-804

[Submit comment/correction]

Reference	TAG-106-804
Title	Multiple origins of allopolyploid Aegilops triuncialis
Journal	Theoretical and Applied Genetics
Year	2003
Volume	106
Pages	804-810
Author	Vanichanon A Blake NK Sherman JD Talbert LE
Abstract	Summary: Polyploidization is a key component of plant evolution. The number of independent origins of polyploid species traditionally has been underestimated. The objective of this study was to ascertain the number of origins of a tetraploid Aegilops species. We screened 84 primer sets to identify genome-specific primer sets for the tetraploid wheat relative [Aegilops triuncialis (UUCC genome)] and its diploid progenitors [Ae. umbellulata (UU genome) and Ae. caudata (CC genome)]. Primer sets G12 and G43 were U genome-specific and D21 was a C genome-specific primer. DNA sequence comparison of the G43 locus was used to estimate the number of polyploidization events in the formation of Ae. triuncialis. Parsimony analysis of G43 data revealed at least two independent formations of Ae. triuncialis. In the chloroplast hotspot region, located between genes rbcL and petA, sequence analysis suggested that at least three polyploidization origins might have occurred independently. Ae. triuncialis appears to be a tetraploid derived from multiple origins with minimal genome change after its formation
External Databases	Pubmed: 12647053
Keyword	[ Hide all but 1 of 31 ] aegilops aegilops triuncialis allopolyploid chloroplast component diploid dna dna sequence evolution gene genetic diversity genome hexaploid wheat hot-spot region length mutations locus mar molecular analysis multiple newly synthesized amphiploids plant evolution polyploid species polyploidization rapid genomic changes rbcl region sequence tetraploid triticum wheat chloroplast dnas wheat relatives

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