Duplication and partitioning in evolution and function of homoeologous Q loci governing domestication characters in polyploid wheat

• DOI: 10.1073/pnas.1110552108
• Publication Date: 2011-11-01T04:21:08Z
• Authors: Zengcui Zhang; Harry Belcram; Piotr Gornicki; Mathieu Charles; Jérémy Just; Cécile Huneau; Ghislaine Magdelenat; Arnaud Couloux; Sylvie Samain; Bikram S. Gill; Jack B. Rasmussen; Valérie Barbe; Justin D. Faris; Boulos Chalhoub
• Keywords: Polyploid; Pseudogene; Subfunctionalization

The Q gene encodes an AP2 -like transcription factor that played important role in domestication of polyploid wheat. chromosome 5A alleles ( 5AQ and 5Aq ) have been well studied, but much less is known about the q on wheat homoeologous chromosomes 5B 5Bq 5D 5Dq ). We investigated organization, evolution, function Q/q homoeoalleles hexaploid Triticum aestivum L.). sequences are highly conserved within among A, B, D genomes wheat, A B tetraploid S, diploid progenitors, intergenic regions locus divergent genomes. Duplication 5.8 Mya was likely followed by selective loss one copies from genome progenitor other copy D, S recent V 329 -to-I mutation lineage correlated with phenotype. became a pseudogene after allotetraploidization. Expression analysis indicated coregulated complex manner. Combined phenotypic expression that, whereas plays major conferring domestication-related traits, contributes directly indirectly to suppression speltoid evolution loci resulted hyperfunctionalization , pseudogenization subfunctionalization all contributing traits.