Occurrence of 2n microspore production in diploid interspecific hybrids between the wild parental species of peanut (Arachis hypogaea L., Leguminosae) and its relevance in the genetic origin of the cultigen

Unreduced (2n) gametes are the driving force that leads to polyploidization of plants in nature and an important tool for ploidy breeding. Peanut (Arachis hypogaea L., Leguminosae) seems most likely to have originated by sexual polyploidization through interspecific hybridization between the wild di...

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Autores principales: García, Alejandra Vanina, Ortiz, Alejandra Marcela, Silvestri, María Celeste, Custodio, Adriana Regina, Moretzsohn, Márcio C., Lavia, Graciela Inés
Formato: Artículo
Lenguaje:Inglés
Publicado: Crop Science Society of America 2025
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/59378
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RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
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spelling I48-R184-123456789-593782025-12-15T12:04:35Z Occurrence of 2n microspore production in diploid interspecific hybrids between the wild parental species of peanut (Arachis hypogaea L., Leguminosae) and its relevance in the genetic origin of the cultigen García, Alejandra Vanina Ortiz, Alejandra Marcela Silvestri, María Celeste, Custodio, Adriana Regina Moretzsohn, Márcio C. Lavia, Graciela Inés Unreduced (2n) gametes are the driving force that leads to polyploidization of plants in nature and an important tool for ploidy breeding. Peanut (Arachis hypogaea L., Leguminosae) seems most likely to have originated by sexual polyploidization through interspecific hybridization between the wild diploid relatives—A. duranensis Krapov. & W.C. Greg. and A. ipaënsis Krapov. & W.C. Greg—and subsequent binding of the unreduced gametes in the hybrid. Therefore, aiming to contribute to understanding the event of polyploid origin of this important crop, we made diploid hybrids between A. duranensis and A. ipaënsis and then investigated the production of unreduced gametes in the hybrids by analyzing the size range of pollen, the constitution of the sporads, and the microsporogenesis process. The meiotic abnormalities found, such as persistent bridges, tripolar spindles, and cytomixis processes, would lead to the formation of restitution nuclei in both the first and second meiotic division. These failures in the regularity of meiosis lead to the formation of dyads and triads, and consequently to 2n pollen grains. These findings constitute the first evidence of the formation of unreduced gametes in intergenomic hybrids obtained between the wild progenitors of A. hypogaea and enable us to propose a model of origin of the crop through sexual polyploidization. 2025-12-15T11:33:38Z 2025-12-15T11:33:38Z 2020-06 Artículo García, Alejandra Vanina, et al. ,2020. Occurrence of 2n microspore production in diploid interspecific hybrids between the wild parental species of peanut (Arachis hypogaea L., Leguminosae) and its relevance in the genetic origin of the cultigen. Baltimore: Crop Science Society of America, vol. 60, p. 2420-2436. E-ISSN0011-183X. 1435-0653 http://repositorio.unne.edu.ar/handle/123456789/59378 eng https://doi.org/10.1002/csc2.20233 closedAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf p. 2420-2436 application/pdf Crop Science Society of America Crop Science, 2020, vol. 60, p. 2420-2436.
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
description Unreduced (2n) gametes are the driving force that leads to polyploidization of plants in nature and an important tool for ploidy breeding. Peanut (Arachis hypogaea L., Leguminosae) seems most likely to have originated by sexual polyploidization through interspecific hybridization between the wild diploid relatives—A. duranensis Krapov. & W.C. Greg. and A. ipaënsis Krapov. & W.C. Greg—and subsequent binding of the unreduced gametes in the hybrid. Therefore, aiming to contribute to understanding the event of polyploid origin of this important crop, we made diploid hybrids between A. duranensis and A. ipaënsis and then investigated the production of unreduced gametes in the hybrids by analyzing the size range of pollen, the constitution of the sporads, and the microsporogenesis process. The meiotic abnormalities found, such as persistent bridges, tripolar spindles, and cytomixis processes, would lead to the formation of restitution nuclei in both the first and second meiotic division. These failures in the regularity of meiosis lead to the formation of dyads and triads, and consequently to 2n pollen grains. These findings constitute the first evidence of the formation of unreduced gametes in intergenomic hybrids obtained between the wild progenitors of A. hypogaea and enable us to propose a model of origin of the crop through sexual polyploidization.
format Artículo
author García, Alejandra Vanina
Ortiz, Alejandra Marcela
Silvestri, María Celeste,
Custodio, Adriana Regina
Moretzsohn, Márcio C.
Lavia, Graciela Inés
spellingShingle García, Alejandra Vanina
Ortiz, Alejandra Marcela
Silvestri, María Celeste,
Custodio, Adriana Regina
Moretzsohn, Márcio C.
Lavia, Graciela Inés
Occurrence of 2n microspore production in diploid interspecific hybrids between the wild parental species of peanut (Arachis hypogaea L., Leguminosae) and its relevance in the genetic origin of the cultigen
author_facet García, Alejandra Vanina
Ortiz, Alejandra Marcela
Silvestri, María Celeste,
Custodio, Adriana Regina
Moretzsohn, Márcio C.
Lavia, Graciela Inés
author_sort García, Alejandra Vanina
title Occurrence of 2n microspore production in diploid interspecific hybrids between the wild parental species of peanut (Arachis hypogaea L., Leguminosae) and its relevance in the genetic origin of the cultigen
title_short Occurrence of 2n microspore production in diploid interspecific hybrids between the wild parental species of peanut (Arachis hypogaea L., Leguminosae) and its relevance in the genetic origin of the cultigen
title_full Occurrence of 2n microspore production in diploid interspecific hybrids between the wild parental species of peanut (Arachis hypogaea L., Leguminosae) and its relevance in the genetic origin of the cultigen
title_fullStr Occurrence of 2n microspore production in diploid interspecific hybrids between the wild parental species of peanut (Arachis hypogaea L., Leguminosae) and its relevance in the genetic origin of the cultigen
title_full_unstemmed Occurrence of 2n microspore production in diploid interspecific hybrids between the wild parental species of peanut (Arachis hypogaea L., Leguminosae) and its relevance in the genetic origin of the cultigen
title_sort occurrence of 2n microspore production in diploid interspecific hybrids between the wild parental species of peanut (arachis hypogaea l., leguminosae) and its relevance in the genetic origin of the cultigen
publisher Crop Science Society of America
publishDate 2025
url http://repositorio.unne.edu.ar/handle/123456789/59378
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