Tags

Type your tag names separated by a space and hit enter

Recurrent deletions of puroindoline genes at the grain hardness locus in four independent lineages of polyploid wheat.
Plant Physiol. 2008 Jan; 146(1):200-12.PP

Abstract

Polyploidy is known to induce numerous genetic and epigenetic changes but little is known about their physiological bases. In wheat, grain texture is mainly determined by the Hardness (Ha) locus consisting of genes Puroindoline a (Pina) and b (Pinb). These genes are conserved in diploid progenitors but were deleted from the A and B genomes of tetraploid Triticum turgidum (AB). We now report the recurrent deletions of Pina-Pinb in other lineages of polyploid wheat. We analyzed the Ha haplotype structure in 90 diploid and 300 polyploid accessions of Triticum and Aegilops spp. Pin genes were conserved in all diploid species and deletion haplotypes were detected in all polyploid Triticum and most of the polyploid Aegilops spp. Two Pina-Pinb deletion haplotypes were found in hexaploid wheat (Triticum aestivum; ABD). Pina and Pinb were eliminated from the G genome, but maintained in the A genome of tetraploid Triticum timopheevii (AG). Subsequently, Pina and Pinb were deleted from the A genome but retained in the A(m) genome of hexaploid Triticum zhukovskyi (A(m)AG). Comparison of deletion breakpoints demonstrated that the Pina-Pinb deletion occurred independently and recurrently in the four polyploid wheat species. The implications of Pina-Pinb deletions for polyploid-driven evolution of gene and genome and its possible physiological significance are discussed.

Links

PMC Free PDF

Authors+Show Affiliations

Li W
Wheat Genetic and Genomic Resources Center, Department of Plant Pathology, Kansas State University, Manhattan, KS 66506-5502, USA.
Huang L
No affiliation info available
Gill BS
No affiliation info available

MeSH

Gene DeletionGenes, PlantHaplotypesHardnessPlant ProteinsPolyploidySeedsTriticum

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

18024553

Citation

Li, Wanlong, et al. "Recurrent Deletions of Puroindoline Genes at the Grain Hardness Locus in Four Independent Lineages of Polyploid Wheat." Plant Physiology, vol. 146, no. 1, 2008, pp. 200-12.
Li W, Huang L, Gill BS. Recurrent deletions of puroindoline genes at the grain hardness locus in four independent lineages of polyploid wheat. Plant Physiol. 2008;146(1):200-12.
Li, W., Huang, L., & Gill, B. S. (2008). Recurrent deletions of puroindoline genes at the grain hardness locus in four independent lineages of polyploid wheat. Plant Physiology, 146(1), 200-12.
Li W, Huang L, Gill BS. Recurrent Deletions of Puroindoline Genes at the Grain Hardness Locus in Four Independent Lineages of Polyploid Wheat. Plant Physiol. 2008;146(1):200-12. PubMed PMID: 18024553.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Recurrent deletions of puroindoline genes at the grain hardness locus in four independent lineages of polyploid wheat. AU - Li,Wanlong, AU - Huang,Li, AU - Gill,Bikram S, Y1 - 2007/11/16/ PY - 2007/11/21/pubmed PY - 2008/3/28/medline PY - 2007/11/21/entrez SP - 200 EP - 12 JF - Plant physiology JO - Plant Physiol VL - 146 IS - 1 N2 - Polyploidy is known to induce numerous genetic and epigenetic changes but little is known about their physiological bases. In wheat, grain texture is mainly determined by the Hardness (Ha) locus consisting of genes Puroindoline a (Pina) and b (Pinb). These genes are conserved in diploid progenitors but were deleted from the A and B genomes of tetraploid Triticum turgidum (AB). We now report the recurrent deletions of Pina-Pinb in other lineages of polyploid wheat. We analyzed the Ha haplotype structure in 90 diploid and 300 polyploid accessions of Triticum and Aegilops spp. Pin genes were conserved in all diploid species and deletion haplotypes were detected in all polyploid Triticum and most of the polyploid Aegilops spp. Two Pina-Pinb deletion haplotypes were found in hexaploid wheat (Triticum aestivum; ABD). Pina and Pinb were eliminated from the G genome, but maintained in the A genome of tetraploid Triticum timopheevii (AG). Subsequently, Pina and Pinb were deleted from the A genome but retained in the A(m) genome of hexaploid Triticum zhukovskyi (A(m)AG). Comparison of deletion breakpoints demonstrated that the Pina-Pinb deletion occurred independently and recurrently in the four polyploid wheat species. The implications of Pina-Pinb deletions for polyploid-driven evolution of gene and genome and its possible physiological significance are discussed. SN - 0032-0889 UR - https://www.unboundmedicine.com/medline/citation/18024553/Recurrent_deletions_of_puroindoline_genes_at_the_grain_hardness_locus_in_four_independent_lineages_of_polyploid_wheat_ DB - PRIME DP - Unbound Medicine ER -