Shaping polyploid wheat for success: Origins, domestication, and the genetic improvement of agronomic traits

Liu, Jie; Yao, Yingyin; Xin, Mingming; Peng, Huiru; Ni, Zhongfu; Sun, Qixin

doi:10.1111/jipb.13210

Cited by 38 publications

(15 citation statements)

References 291 publications

(404 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Polyploid hybridization between tetraploid and diploid wheat gave rise to the allohexaploid wheat, which has become one of the major crops contributing to its genome plasticity ( Dubcovsky and Dvorak, 2007 ; Liu et al, 2021 ). Since numerous desirable agronomic characteristics are contained in tetraploid wheat, many research focused on the introgression of beneficial genes and traits into hexaploid wheat ( Xie and Nevo, 2008 ; Nevo et al, 2013 ; Peng et al, 2013 ; Nevo, 2014 ).…”

Section: Discussionmentioning

confidence: 99%

Pentaploidization Enriches the Genetic Diversity of Wheat by Enhancing the Recombination of AB Genomes

Yang

Wan²,

Li³

et al. 2022

Front. Plant Sci.

View full text Add to dashboard Cite

Allohexaploidization and continuous introgression play a key role in the origin and evolution of bread wheat. The genetic bottleneck of bread wheat resulting from limited germplasms involved in the origin and modern breeding may be compensated by gene flow from tetraploid wheat through introgressive hybridization. The inter-ploidy hybridization between hexaploid and tetraploid wheat generates pentaploid hybrids first, which absorbed genetic variations both from hexaploid and tetraploid wheat and have great potential for re-evolution and improvement in bread wheat. Therefore, understanding the effects of the pentaploid hybrid is of apparent significance in our understanding of the historic introgression and in informing breeding. In the current study, two sets of F2 populations of synthetic pentaploid wheat (SPW1 and SPW2) and synthetic hexaploid wheat (SHW1 and SHW2) were created to analyze differences in recombination frequency (RF) of AB genomes and distorted segregation of polymorphic SNP markers through SNP genotyping. Results suggested that (1) the recombination of AB genomes in the SPW populations was about 3- to 4-fold higher than that in the SHW populations, resulting from the significantly (P < 0.01) increased RF between adjacent and linked SNP loci, especially the variations that occurred in a pericentromeric region which would further enrich genetic diversity; (2) the crosses of hexaploid × tetraploid wheat could be an efficient way to produce pentaploid derivatives than the crosses of tetraploid × hexaploid wheat according to the higher germination rate found in the former crosses; (3) the high proportion of distorted segregation loci that skewed in favor of the female parent genotype/allele in the SPW populations might associate with the fitness and survival of the offspring. Based on the presented data, we propose that pentaploid hybrids should increasingly be used in wheat breeding. In addition, the contribution of gene flow from tetraploid wheat to bread wheat mediated by pentaploid introgressive hybridization also was discussed in the re-evolution of bread wheat.

show abstract

Section: Discussionmentioning

confidence: 99%

Pentaploidization Enriches the Genetic Diversity of Wheat by Enhancing the Recombination of AB Genomes

Yang

Wan²,

Li³

et al. 2022

Front. Plant Sci.

View full text Add to dashboard Cite

show abstract

“…In wheat, the TaBOR3 subfamily contains eight members, indicating an expanded number of members. Both wheat and rape were polyploidy crops that occurred through genome duplication events, which may be the reason for the copy number expansion of the BOR gene in wheat and in the B. napus genome, enhancing the adaptability of crops to different environments ( Liu et al, 2022 ).…”

Section: Discussionmentioning

confidence: 99%

Molecular characterization of the genome-wide BOR transporter family and their responses to boron conditions in common wheat (Triticum aestivum L.)

Wang

Niu

et al. 2022

Front. Plant Sci.

View full text Add to dashboard Cite

Boron (B) deficiency is an agricultural problem that causes significant yield losses in many countries. B transporters (BORs) are responsible for B uptake and distribution and play important roles in yield formation. A comprehensive analysis of the BOR family members in common wheat is still lacking. In the present study, to clarify the molecular characterization and response to B status, genome-wide TaBOR genes and expression patterns were investigated. Fourteen TaBOR genes were identified in common wheat by a homology search. The corresponding phylogenetic tree indicated that 14 TaBOR genes were separately classified into subfamilies of TaBOR1, TaBOR3, and TaBOR4. All TaBOR genes had 12–14 extrons and 11–13 introns. Most TaBOR proteins contained 10 conserved motifs, and motifs 1, 2, 3, 4, and 6 constituted the conserved bicarbonate (HCO3–) domain. Fourteen TaBOR genes were mapped on 13 chromosomes mainly distributed in the first, third, fifth, and seventh homologous groups. The promoters of TaBOR genes consisted of phytohormones, light responses, and stress-related cis-elements. GO analysis indicated that TaBOR genes were enriched in terms of transmembrane transport and ion homeostasis. TaBOR genes showed diverse expression profiles in different tissues. The members of the TaBOR1 subfamily showed high expression in grains, leaves, roots, stems, and spikes, but members of the TaBOR4 subfamily were highly expressed only in spikes and grains. RT–qPCR indicated that TaBOR1-5A, TaBOR1-5B, and TaBOR1-5D were induced by low B concentrations and had much higher expression in roots than in shoots. TaBOR3-3A, TaBOR3-3B, TaBOR3-3D, TaBOR4-1A, TaBOR4-1B, TaBOR4-1D, and TaBOR3-4B were induced by low and high B concentrations and had high expression in roots and shoots. TaBOR3-4D and TaBOR3-7B were upregulated by low and high B concentrations, respectively, but had expression only in roots. Our results provide basic information on the TaBOR family, which is beneficial for elucidating the functions of TaBOR genes to overcome the problem of B deficiency.

show abstract

“…Common wheat ( Triticum aestivum L.) is one of the most important food crops, with a large and complex genome that has undergone two rounds of polyploidization (Liu et al ., 2022). Multiple studies showed that the complexity of gene regulation in wheat involves coordinating both transcriptional and epigenetic regulations among subgenomes.…”

Section: Introductionmentioning

confidence: 99%

Reshaped DNA methylation cooperating with homoeolog‐divergent expression promotes improved root traits in synthesized tetraploid wheat

Miao,

Xu,

Liu

et al. 2024

New Phytologist

Self Cite

View full text Add to dashboard Cite

Summary Polyploidization is a major event driving plant evolution and domestication. However, how reshaped epigenetic modifications coordinate gene transcription to generate phenotypic variations during wheat polyploidization is currently elusive. Here, we profiled transcriptomes and DNA methylomes of two diploid wheat accessions (SlSl and AA) and their synthetic allotetraploid wheat line (SlSlAA), which displayed elongated root hair and improved root capability for nitrate uptake and assimilation after tetraploidization. Globally decreased DNA methylation levels with a reduced difference between subgenomes were observed in the roots of SlSlAA. DNA methylation changes in first exon showed strong connections with altered transcription during tetraploidization. Homoeolog‐specific transcription was associated with biased DNA methylation as shaped by homoeologous sequence variation. The hypomethylated promoters showed significantly enriched binding sites for MYB, which may affect gene transcription in response to root hair growth. Two master regulators in root hair elongation pathway, AlCPC and TuRSL4, exhibited upregulated transcription levels accompanied by hypomethylation in promoter, which may contribute to the elongated root hair. The upregulated nitrate transporter genes, including NPFs and NRTs, also are significantly associated with hypomethylation, indicating an epigenetic‐incorporated regulation manner in improving nitrogen use efficiency. Collectively, these results provided new insights into epigenetic changes in response to crop polyploidization and underscored the importance of epigenetic regulation in improving crop traits.

show abstract

Shaping polyploid wheat for success: Origins, domestication, and the genetic improvement of agronomic traits

Cited by 38 publications

References 291 publications

Pentaploidization Enriches the Genetic Diversity of Wheat by Enhancing the Recombination of AB Genomes

Pentaploidization Enriches the Genetic Diversity of Wheat by Enhancing the Recombination of AB Genomes

Molecular characterization of the genome-wide BOR transporter family and their responses to boron conditions in common wheat (Triticum aestivum L.)

Reshaped DNA methylation cooperating with homoeolog‐divergent expression promotes improved root traits in synthesized tetraploid wheat

Contact Info

Product

Resources

About