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Tetrasomic Recombination Is Surprisingly Frequent in Allotetraploid Arachis

Arachis hypogaea L. (cultivated peanut) is an allotetraploid (2n = 4x = 40) with an AABB genome type. Based on cytogenetic studies it has been assumed that peanut and wild-derived induced AABB allotetraploids have classic allotetraploid genetic behavior with diploid-like disomic recombination only b...

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Autores principales: Leal-Bertioli, Soraya, Shirasawa, Kenta, Abernathy, Brian, Moretzsohn, Marcio, Chavarro, Carolina, Clevenger, Josh, Ozias-Akins, Peggy, Jackson, Scott, Bertioli, David
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Genetics Society of America 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4391553/
https://www.ncbi.nlm.nih.gov/pubmed/25701284
http://dx.doi.org/10.1534/genetics.115.174607
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author Leal-Bertioli, Soraya
Shirasawa, Kenta
Abernathy, Brian
Moretzsohn, Marcio
Chavarro, Carolina
Clevenger, Josh
Ozias-Akins, Peggy
Jackson, Scott
Bertioli, David
author_facet Leal-Bertioli, Soraya
Shirasawa, Kenta
Abernathy, Brian
Moretzsohn, Marcio
Chavarro, Carolina
Clevenger, Josh
Ozias-Akins, Peggy
Jackson, Scott
Bertioli, David
author_sort Leal-Bertioli, Soraya
collection PubMed
description Arachis hypogaea L. (cultivated peanut) is an allotetraploid (2n = 4x = 40) with an AABB genome type. Based on cytogenetic studies it has been assumed that peanut and wild-derived induced AABB allotetraploids have classic allotetraploid genetic behavior with diploid-like disomic recombination only between homologous chromosomes, at the exclusion of recombination between homeologous chromosomes. Using this assumption, numerous linkage map and quantitative trait loci studies have been carried out. Here, with a systematic analysis of genotyping and gene expression data, we show that this assumption is not entirely valid. In fact, autotetraploid-like tetrasomic recombination is surprisingly frequent in recombinant inbred lines generated from a cross of cultivated peanut and an induced allotetraploid derived from peanut’s most probable ancestral species. We suggest that a better, more predictive genetic model for peanut is that of a “segmental allotetraploid” with partly disomic, partly tetrasomic genetic behavior. This intermediate genetic behavior has probably had a previously overseen, but significant, impact on the genome and genetics of cultivated peanut.
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spelling pubmed-43915532015-04-10 Tetrasomic Recombination Is Surprisingly Frequent in Allotetraploid Arachis Leal-Bertioli, Soraya Shirasawa, Kenta Abernathy, Brian Moretzsohn, Marcio Chavarro, Carolina Clevenger, Josh Ozias-Akins, Peggy Jackson, Scott Bertioli, David Genetics Investigations Arachis hypogaea L. (cultivated peanut) is an allotetraploid (2n = 4x = 40) with an AABB genome type. Based on cytogenetic studies it has been assumed that peanut and wild-derived induced AABB allotetraploids have classic allotetraploid genetic behavior with diploid-like disomic recombination only between homologous chromosomes, at the exclusion of recombination between homeologous chromosomes. Using this assumption, numerous linkage map and quantitative trait loci studies have been carried out. Here, with a systematic analysis of genotyping and gene expression data, we show that this assumption is not entirely valid. In fact, autotetraploid-like tetrasomic recombination is surprisingly frequent in recombinant inbred lines generated from a cross of cultivated peanut and an induced allotetraploid derived from peanut’s most probable ancestral species. We suggest that a better, more predictive genetic model for peanut is that of a “segmental allotetraploid” with partly disomic, partly tetrasomic genetic behavior. This intermediate genetic behavior has probably had a previously overseen, but significant, impact on the genome and genetics of cultivated peanut. Genetics Society of America 2015-04 2015-02-20 /pmc/articles/PMC4391553/ /pubmed/25701284 http://dx.doi.org/10.1534/genetics.115.174607 Text en Copyright © 2015 by the Genetics Society of America Available freely online through the author-supported open access option.
spellingShingle Investigations
Leal-Bertioli, Soraya
Shirasawa, Kenta
Abernathy, Brian
Moretzsohn, Marcio
Chavarro, Carolina
Clevenger, Josh
Ozias-Akins, Peggy
Jackson, Scott
Bertioli, David
Tetrasomic Recombination Is Surprisingly Frequent in Allotetraploid Arachis
title Tetrasomic Recombination Is Surprisingly Frequent in Allotetraploid Arachis
title_full Tetrasomic Recombination Is Surprisingly Frequent in Allotetraploid Arachis
title_fullStr Tetrasomic Recombination Is Surprisingly Frequent in Allotetraploid Arachis
title_full_unstemmed Tetrasomic Recombination Is Surprisingly Frequent in Allotetraploid Arachis
title_short Tetrasomic Recombination Is Surprisingly Frequent in Allotetraploid Arachis
title_sort tetrasomic recombination is surprisingly frequent in allotetraploid arachis
topic Investigations
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4391553/
https://www.ncbi.nlm.nih.gov/pubmed/25701284
http://dx.doi.org/10.1534/genetics.115.174607
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