GrainGenes Reference Report: NPH-213-1477
Reference
NPH-213-1477
Title
Reconciling the evolutionary origin of bread wheat (Triticum aestivum).
Journal
New Phytologist
Year
2017
Volume
213
Pages
1477-1486
Author
El Baidouri M
[ Show all 10 ]
Abstract
The origin of bread wheat (Triticum aestivum; AABBDD) has been a subject of controversy and of intense debate in the scientific community over the last few decades. In 2015, three articles published in New Phytologist discussed the origin of hexaploid bread wheat (AABBDD) from the diploid progenitors Triticumurartu (AA), a relative of Aegilops speltoides (BB) and Triticumtauschii (DD). Access to new genomic resources since 2013 has offered the opportunity to gain novel insights into the paleohistory of modern bread wheat, allowing characterization of its origin from its diploid progenitors at unprecedented resolution. We propose a reconciled evolutionary scenario for the modern bread wheat genome based on the complementary investigation of transposable element and mutation dynamics between diploid, tetraploid and hexaploid wheat. In this scenario, the structural asymmetry observed between the A, B and D subgenomes in hexaploid bread wheat derives from the cumulative effect of diploid progenitor divergence, the hybrid origin of the D subgenome, and subgenome partitioning following the polyploidization events.
External Databases
PubMed: 27551821
Keyword
ancestor evolution origin polyploidization wheat
GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.
GrainGenes Reference Report: NPH-213-1477
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||