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The genome structure of Arachis hypogaea (Linnaeus, 1753) and an induced Arachis allotetraploid revealed by molecular cytogenetics

do Nascimento, Eliza F de M B ; Dos Santos, Bruna V ; Marques, Lara O C ; Guimarães, Patricia M ; Brasileiro, Ana C M ; Leal-Bertioli, Soraya C M ; Bertioli, David J ; Araujo, Ana C G

Comparative cytogenetics, 2018, Vol.12 (1), p.111-140 [Periódico revisado por pares]

Bulgaria: Pensoft Publishers

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  • Título:
    The genome structure of Arachis hypogaea (Linnaeus, 1753) and an induced Arachis allotetraploid revealed by molecular cytogenetics
  • Autor: do Nascimento, Eliza F de M B ; Dos Santos, Bruna V ; Marques, Lara O C ; Guimarães, Patricia M ; Brasileiro, Ana C M ; Leal-Bertioli, Soraya C M ; Bertioli, David J ; Araujo, Ana C G
  • Assuntos: Arachis hypogaea ; Chromosomes ; Cytogenetics ; Deoxyribonucleic acid ; DNA ; Gene sequencing ; Genomes ; Hybridization ; Karyotypes ; Loci ; Morphology ; Nucleotide sequence ; Partial stabilization ; Peanuts ; Polyploidy ; Recombination ; Species ; Stability
  • É parte de: Comparative cytogenetics, 2018, Vol.12 (1), p.111-140
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
    Academic editor: N. Golub
  • Descrição: Peanut, (Linnaeus, 1753) is an allotetraploid cultivated plant with two subgenomes derived from the hybridization between two diploid wild species, (Krapovickas & W. C. Gregory, 1994) and (Krapovickas & W. C. Gregory, 1994), followed by spontaneous chromosomal duplication. To understand genome changes following polyploidy, the chromosomes of , IpaDur1, an induced allotetraploid ( × ) and the diploid progenitor species were cytogenetically compared. The karyotypes of the allotetraploids share the number and general morphology of chromosomes; DAPI bands pattern and number of 5S rDNA loci. However, one 5S rDNA locus presents a heteromorphic FISH signal in both allotetraploids, relative to corresponding progenitor. Whilst for the number of 45S rDNA loci was equivalent to the sum of those present in the diploid species, in IpaDur1, two loci have not been detected. Overall distribution of repetitive DNA sequences was similar in both allotetraploids, although had additional CMA bands and few slight differences in the LTR-retrotransposons distribution compared to IpaDur1. GISH showed that the chromosomes of both allotetraploids had preferential hybridization to their corresponding diploid genomes. Nevertheless, at least one pair of IpaDur1 chromosomes had a clear mosaic hybridization pattern indicating recombination between the subgenomes, clear evidence that the genome of IpaDur1 shows some instability comparing to the genome of that shows no mosaic of subgenomes, although both allotetraploids derive from the same progenitor species. For some reasons, the chromosome structure of is inherently more stable, or, it has been at least, partially stabilized through genetic changes and selection.
  • Editor: Bulgaria: Pensoft Publishers
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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