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Oat chromosome and genome evolution defined by widespread terminal intergenomic translocations in polyploids.
Front Plant Sci
November 2022
Department of Genetics and Genome Biology, University of Leicester, Leicester, United Kingdom.
Structural chromosome rearrangements involving translocations, fusions and fissions lead to evolutionary variation between species and potentially reproductive isolation and variation in gene expression. While the wheats (Triticeae, Poaceae) and oats (Aveneae) all maintain a basic chromosome number of =7, genomes of oats show frequent intergenomic translocations, in contrast to wheats where these translocations are relatively rare. We aimed to show genome structural diversity and genome relationships in tetraploid, hexaploid and octoploid species and amphiploids, establishing patterns of intergenomic translocations across different oat taxa using fluorescence hybridization (FISH) with four well-characterized repetitive DNA sequences: pAs120, AF226603, Ast-R171 and Ast-T116.
View Article and Find Full Text PDFChitin Deacetylases Are Required for Endophytic Cell Wall Remodeling During Establishment of a Mutualistic Symbiotic Interaction with .
Mol Plant Microbe Interact
October 2021
School of Fundamental Sciences, Massey University, Palmerston North 4442, New Zealand.
forms a mutualistic symbiotic association with . This biotrophic fungus systemically colonizes the intercellular spaces of aerial tissues to form an endophytic hyphal network and also grows as an epiphyte. However, little is known about the cell wall-remodeling mechanisms required to avoid host defense and maintain intercalary growth within the host.
View Article and Find Full Text PDFB Chromosomes in Grasshoppers: Different Origins and Pathways to the Modern B.
Genes (Basel)
October 2018
The Federal Research Center Institute of Cytology and Genetics, Russian Academy of Sciences, Siberian Branch, Lavrentjev Ave., 10, 630090 Novosibirsk, Russia.
B chromosomes (B) were described in most taxa of eukaryotes and in around 11.9% of studied Orthopteran species. In some grasshopper species, their evolution has led to many B chromosome morphotypes.
View Article and Find Full Text PDFChromosome aberrations induced by zebularine in triticale.
Genome
July 2016
a State Key Laboratory of Crop Genetics and Germplasm Enhancement, JCIC-MCP, Nanjing Agricultural University, Nanjing 210095, China.
Chromosome engineering is an important approach for generating wheat germplasm. Efficient development of chromosome aberrations will facilitate the introgression and application of alien genes in wheat. In this study, zebularine, a DNA methylation transferase inhibitor, was successfully used to induce chromosome aberrations in the octoploid triticale cultivar Jinghui#1.
View Article and Find Full Text PDFForcing the shift of the crossover site to proximal regions in wheat chromosomes.
Theor Appl Genet
September 2015
Departamento de Genética, Facultad de Biología, Universidad Complutense, 28040, Madrid, Spain,
Terminal deletions obligate the first crossover to be formed in more proximal positions. This increases the recombination rate in intercalary intervals but not in the proximity of the centromere. Crossovers are not uniformly distributed along chromosomes in wheat.
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