Genome sizes in diploid and allopolyploid Arachis L. species (section Arachis)

Species of section Arachis with x = 10 are important for peanut breeding and have been organized in five different genomes (A, B, D, F and K). The few available estimates of the DNA content are inconsistent and hampered the understanding of the evolutionary trends and in decision making for gen...

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Autores principales: Samoluk, Sergio Sebastián, Chalup, Laura María Isabel, Robledo Dobladez, Germán Ariel, Seijo, José Guillermo
Formato: Artículo
Lenguaje:Inglés
Publicado: Springer 2021
Materias:
Arachis
Genome size
Germplasm
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/30269
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-30269
record_format dspace
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-184
collection RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
language Inglés
topic Arachis
Genome size
Germplasm
spellingShingle Arachis
Genome size
Germplasm
Samoluk, Sergio Sebastián
Chalup, Laura María Isabel
Robledo Dobladez, Germán Ariel
Seijo, José Guillermo
Genome sizes in diploid and allopolyploid Arachis L. species (section Arachis)
topic_facet Arachis
Genome size
Germplasm
description Species of section Arachis with x = 10 are important for peanut breeding and have been organized in five different genomes (A, B, D, F and K). The few available estimates of the DNA content are inconsistent and hampered the understanding of the evolutionary trends and in decision making for genomic studies of the group. Considering that, the objectives of this research were to measure the DNA content for all available (26) species and to make evolutionary inferences at the diploid and tetraploid level for section Arachis. The 2C values obtained by flow cytometry ranged from 2.55 to 3.22 pg among the diploid species. The annual species belonging to different genomes tend to have different genome sizes. However, the 2C values of the perennial species of the A genome were distributed almost along the whole range of genome sizes here observed. The distribution of 2C values partially support the genome arrangement proposed for the section. The comparisons of 2C values with karyotype parameters suggests that changes in DNA content have been proportionally distributed among the chromosome arms, and that the heterochromatic fractionwas not directly involved in that changes. Within the A genome, the annual species has lowerDNAcontent than the perennial ones, according to the nucleotype hypothesis. However, the lack of significant relationships with geoclimatic variables suggests that there are many intrinsic factors determining particular ecological roles of the DNA content in the different lineages of section Arachis. The constancy of the Cx values observed in the polyploids compared to those of the parental species suggests that the allopolyploidization event that originated the cultivated peanut did not induce significant changes in the genome size.
format Artículo
author Samoluk, Sergio Sebastián
Chalup, Laura María Isabel
Robledo Dobladez, Germán Ariel
Seijo, José Guillermo
author_facet Samoluk, Sergio Sebastián
Chalup, Laura María Isabel
Robledo Dobladez, Germán Ariel
Seijo, José Guillermo
author_sort Samoluk, Sergio Sebastián
title Genome sizes in diploid and allopolyploid Arachis L. species (section Arachis)
title_short Genome sizes in diploid and allopolyploid Arachis L. species (section Arachis)
title_full Genome sizes in diploid and allopolyploid Arachis L. species (section Arachis)
title_fullStr Genome sizes in diploid and allopolyploid Arachis L. species (section Arachis)
title_full_unstemmed Genome sizes in diploid and allopolyploid Arachis L. species (section Arachis)
title_sort genome sizes in diploid and allopolyploid arachis l. species (section arachis)
publisher Springer
publishDate 2021
url http://repositorio.unne.edu.ar/handle/123456789/30269
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AT robledodobladezgermanariel genomesizesindiploidandallopolyploidarachislspeciessectionarachis
AT seijojoseguillermo genomesizesindiploidandallopolyploidarachislspeciessectionarachis
bdutipo_str Repositorios
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