Morphological and genetic diversity of maize landraces along an altitudinal gradient in the Southern Andes
Maize (Zea mays ssp. mays) is a major cereal crop worldwide and is traditionally or commercially cultivated almost all over the Americas. The northwestern region of Argentina (NWA) constitutes one of the main diversity hotspots of the Southern Andes, with contrasting landscapes and a large number of...
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| Format: | Artículo |
| Language: | Inglés |
| Published: |
BioRxiv
2022
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| Online Access: | http://hdl.handle.net/20.500.12123/12901 https://www.biorxiv.org/content/10.1101/2022.07.01.498464v1 https://doi.org/10.1101/2022.07.01.498464 |
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| author | Rivas, Juan Gabriel Gutierrez, Ángela Verónica Defacio, Raquel Alicia Schimpf, Jorge Vicario, Ana L. Hopp, Horacio Esteban Paniego, Norma Beatriz Lia, Veronica Viviana |
| author_browse | Defacio, Raquel Alicia Gutierrez, Ángela Verónica Hopp, Horacio Esteban Lia, Veronica Viviana Paniego, Norma Beatriz Rivas, Juan Gabriel Schimpf, Jorge Vicario, Ana L. |
| author_facet | Rivas, Juan Gabriel Gutierrez, Ángela Verónica Defacio, Raquel Alicia Schimpf, Jorge Vicario, Ana L. Hopp, Horacio Esteban Paniego, Norma Beatriz Lia, Veronica Viviana |
| author_sort | Rivas, Juan Gabriel |
| collection | INTA Digital |
| description | Maize (Zea mays ssp. mays) is a major cereal crop worldwide and is traditionally or commercially cultivated almost all over the Americas. The northwestern region of Argentina (NWA) constitutes one of the main diversity hotspots of the Southern Andes, with contrasting landscapes and a large number of landraces. Despite the extensive collections performed by the “Banco Activo de Germoplasma INTA Pergamino, Argentina” (BAP), most of them have not been characterized yet. Here we report the morphological and molecular evaluation of 30 accessions collected from NWA, along an altitudinal gradient between 1120 and 2950 meters above sea level (masl). Assessment of morphological variation in a common garden allowed the discrimination of two groups, which differed mainly in endosperm type and overall plant size. Although the groups retrieved by the molecular analyses were not consistent with morphological clusters, they showed a clear pattern of altitudinal structuring. Affinities among accessions were not in accordance with racial assignments. Overall, our results revealed that there are two maize gene pools co-existing in NWA, probably resulting from various waves of maize introduction in pre-Columbian times as well as from the adoption of modern varieties by local farmers.
In conclusion, the NWA maize landraces preserved at the BAP possess high morphological and molecular variability. Our results highlight their potential as a source of diversity for increasing the genetic basis of breeding programs and provide useful information to guide future sampling and conservation efforts. |
| format | Artículo |
| id | INTA12901 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | BioRxiv |
| publisherStr | BioRxiv |
| record_format | dspace |
| spelling | INTA129012022-09-16T12:10:17Z Morphological and genetic diversity of maize landraces along an altitudinal gradient in the Southern Andes Rivas, Juan Gabriel Gutierrez, Ángela Verónica Defacio, Raquel Alicia Schimpf, Jorge Vicario, Ana L. Hopp, Horacio Esteban Paniego, Norma Beatriz Lia, Veronica Viviana Maíz Genética Variación Genética Mejora Genética Maize Genetics Genetic Variation Genetic Gain Maize (Zea mays ssp. mays) is a major cereal crop worldwide and is traditionally or commercially cultivated almost all over the Americas. The northwestern region of Argentina (NWA) constitutes one of the main diversity hotspots of the Southern Andes, with contrasting landscapes and a large number of landraces. Despite the extensive collections performed by the “Banco Activo de Germoplasma INTA Pergamino, Argentina” (BAP), most of them have not been characterized yet. Here we report the morphological and molecular evaluation of 30 accessions collected from NWA, along an altitudinal gradient between 1120 and 2950 meters above sea level (masl). Assessment of morphological variation in a common garden allowed the discrimination of two groups, which differed mainly in endosperm type and overall plant size. Although the groups retrieved by the molecular analyses were not consistent with morphological clusters, they showed a clear pattern of altitudinal structuring. Affinities among accessions were not in accordance with racial assignments. Overall, our results revealed that there are two maize gene pools co-existing in NWA, probably resulting from various waves of maize introduction in pre-Columbian times as well as from the adoption of modern varieties by local farmers. In conclusion, the NWA maize landraces preserved at the BAP possess high morphological and molecular variability. Our results highlight their potential as a source of diversity for increasing the genetic basis of breeding programs and provide useful information to guide future sampling and conservation efforts. EEA Pergamino Fil: Rivas, Juan Gabriel. Instituto Nacional de Tecnología Agropecuaria-Consejo Nacional de Investigaciones Científicas y Técnicas (INTA-CONICET). Instituto de Agrobiotecnología y Biología Molecular (IABIMO); Argentina Fil: Gutiérrez, Ángela V. Instituto Nacional de Tecnología Agropecuaria-Consejo Nacional de Investigaciones Científicas y Técnicas (INTA-CONICET). Instituto de Agrobiotecnología y Biología Molecular (IABIMO); Argentina Fil: Defacio, Raquel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino. Recursos Genéticos; Argentina Fil: Schimpf, Jorge. Universidad Nacional de Jujuy. Facultad de Ciencias Agrarias; Argentina Fil: Vicario, Ana L. Instituto Nacional de Semillas (INASE). Laboratorio de Marcadores Moleculares y Fitopatología; Argentina Fil: Hopp, H. Esteban. Instituto Nacional de Tecnología Agropecuaria-Consejo Nacional de Investigaciones Científicas y Técnicas (INTA-CONICET). Instituto de Agrobiotecnología y Biología Molecular (IABIMO); Argentina Fil: Hopp, H. Esteban. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina Fil: Paniego, Norma Beatriz. Instituto Nacional de Tecnología Agropecuaria-Consejo Nacional de Investigaciones Científicas y Técnicas (INTA-CONICET). Instituto de Agrobiotecnología y Biología Molecular (IABIMO); Argentina Fil: Lia, Veronica V. Instituto Nacional de Tecnología Agropecuaria-Consejo Nacional de Investigaciones Científicas y Técnicas (INTA-CONICET). Instituto de Agrobiotecnología y Biología Molecular (IABIMO); Argentina Fil: Lia, Veronica V. Esteban. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina 2022-09-16T12:02:31Z 2022-09-16T12:02:31Z 2022-07 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion http://hdl.handle.net/20.500.12123/12901 https://www.biorxiv.org/content/10.1101/2022.07.01.498464v1 https://doi.org/10.1101/2022.07.01.498464 eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf BioRxiv BioRxiv (July 2022) |
| spellingShingle | Maíz Genética Variación Genética Mejora Genética Maize Genetics Genetic Variation Genetic Gain Rivas, Juan Gabriel Gutierrez, Ángela Verónica Defacio, Raquel Alicia Schimpf, Jorge Vicario, Ana L. Hopp, Horacio Esteban Paniego, Norma Beatriz Lia, Veronica Viviana Morphological and genetic diversity of maize landraces along an altitudinal gradient in the Southern Andes |
| title | Morphological and genetic diversity of maize landraces along an altitudinal gradient in the Southern Andes |
| title_full | Morphological and genetic diversity of maize landraces along an altitudinal gradient in the Southern Andes |
| title_fullStr | Morphological and genetic diversity of maize landraces along an altitudinal gradient in the Southern Andes |
| title_full_unstemmed | Morphological and genetic diversity of maize landraces along an altitudinal gradient in the Southern Andes |
| title_short | Morphological and genetic diversity of maize landraces along an altitudinal gradient in the Southern Andes |
| title_sort | morphological and genetic diversity of maize landraces along an altitudinal gradient in the southern andes |
| topic | Maíz Genética Variación Genética Mejora Genética Maize Genetics Genetic Variation Genetic Gain |
| url | http://hdl.handle.net/20.500.12123/12901 https://www.biorxiv.org/content/10.1101/2022.07.01.498464v1 https://doi.org/10.1101/2022.07.01.498464 |
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