Prospective genetic gain to improve salinity tolerance in a population of Panicum coloratum var. coloratum with two different selection methods
Panicum coloratum var. coloratum is a subtropical grass for potentially increasing forage production in lowly productive environments where cattle-raising activities have been relocated. Heritability was estimated for characters related to salinity tolerance under saline and non-saline conditions to...
| Main Authors: | , , , , , |
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| Format: | Artículo |
| Language: | Inglés |
| Published: |
CIAT
2021
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| Online Access: | http://hdl.handle.net/20.500.12123/9882 https://www.tropicalgrasslands.info/index.php/tgft/article/view/868 https://doi.org/10.17138/tgft(9)171-181 |
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| author | Pittaro, Gabriela Lifschitz, Mauro Ezequiel Sanchez, Miguel Alejandro Bustos, Dolores Angela Otondo, Jose Tomas, Maria Andrea |
| author_browse | Bustos, Dolores Angela Lifschitz, Mauro Ezequiel Otondo, Jose Pittaro, Gabriela Sanchez, Miguel Alejandro Tomas, Maria Andrea |
| author_facet | Pittaro, Gabriela Lifschitz, Mauro Ezequiel Sanchez, Miguel Alejandro Bustos, Dolores Angela Otondo, Jose Tomas, Maria Andrea |
| author_sort | Pittaro, Gabriela |
| collection | INTA Digital |
| description | Panicum coloratum var. coloratum is a subtropical grass for potentially increasing forage production in lowly productive environments where cattle-raising activities have been relocated. Heritability was estimated for characters related to salinity tolerance under saline and non-saline conditions to explore the possibility of improving tolerance by selection. From a base germplasm collected in a very harsh environment, heritability and gain after selection were calculated using 2 recombination units: individual and phenotypic family mean (PFM). Heritability estimates were very low for all characters both in saline and non-saline conditions, suggesting a complex genetic control of salinity tolerance, with a high proportion of non-additive genetic effects. Estimates were higher using individual selection than with PFM and expected genetic gains were higher for individual selection. When compared in both saline and non-saline conditions, predicted means were greater than for plants of cv. Klein, the most common cultivar in use. It appears that the analyzed germplasm would be a valuable source of genes to be included in breeding programs to increase salinity tolerance in Panicum coloratum. |
| format | Artículo |
| id | INTA9882 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | CIAT |
| publisherStr | CIAT |
| record_format | dspace |
| spelling | INTA98822021-07-23T19:42:09Z Prospective genetic gain to improve salinity tolerance in a population of Panicum coloratum var. coloratum with two different selection methods Pittaro, Gabriela Lifschitz, Mauro Ezequiel Sanchez, Miguel Alejandro Bustos, Dolores Angela Otondo, Jose Tomas, Maria Andrea Panicum Coloratum Fitomejoramiento Tolerancia a la Sal Variación Genética Fenotipos Plant Breeding Salt Tolerance Genetic Variation Phenotypes Genetic Gain Mejora Genética Panicum coloratum var. coloratum is a subtropical grass for potentially increasing forage production in lowly productive environments where cattle-raising activities have been relocated. Heritability was estimated for characters related to salinity tolerance under saline and non-saline conditions to explore the possibility of improving tolerance by selection. From a base germplasm collected in a very harsh environment, heritability and gain after selection were calculated using 2 recombination units: individual and phenotypic family mean (PFM). Heritability estimates were very low for all characters both in saline and non-saline conditions, suggesting a complex genetic control of salinity tolerance, with a high proportion of non-additive genetic effects. Estimates were higher using individual selection than with PFM and expected genetic gains were higher for individual selection. When compared in both saline and non-saline conditions, predicted means were greater than for plants of cv. Klein, the most common cultivar in use. It appears that the analyzed germplasm would be a valuable source of genes to be included in breeding programs to increase salinity tolerance in Panicum coloratum. Panicum coloratum var. coloratum es una gramínea forrajera subtropical adecuada para incrementar la producción de forraje en ambientes de baja productividad donde la ganadería ha sido relocalizada. En un estudio realizado en Buenos Aires y Córdoba, Argentina, se estimó la heredabilidad para caracteres relacionados a la tolerancia a salinidad en condiciones salinas y no salinas para explorar la posibilidad de mejorar la tolerancia por selección. A partir de un germoplasma base recolectado de un ambiente con condiciones restrictivas de crecimiento, la heredabilidad y la ganancia genética luego de un ciclo de selección fueron calculadas usando dos unidades de recombinación: individual y media fenotípica familiar (PFM en inglés). Las estimaciones de heredabilidad fueron bajas para todos los caracteres tanto en condiciones salinas como no salinas sugiriendo un complejo control genético de la tolerancia a salinidad con alta proporción de efectos genéticos no aditivos. Las estimaciones fueron superiores usando la selección individual en comparación con la media fenotípica familiar. La ganancia genética esperada fue mayor para la selección individual. Tanto en condiciones salinas como en no salinas, la media predicha fue superior al cv. Klein, el cultivar más común de la variedad. El germoplasma analizado sería un buen recurso para ser incluido en programas de mejoramiento para incrementar la tolerancia a salinidad en Panicum coloratum. Instituto de Fisiología y Recursos Genéticos Vegetales Fil: Pittaro, Gabriela. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina Fil: Lifschitz, Mauro Ezequiel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina Fil: Lifschitz, Mauro Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fil: Sanchez, Miguel Alejandro. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina Fil: Bustos, Dolores Angela. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina Fil: Otondo, José. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cuenca del Salado; Argentina Fil: Tomas, Maria Andrea. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina 2021-07-23T19:33:23Z 2021-07-23T19:33:23Z 2021 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/9882 https://www.tropicalgrasslands.info/index.php/tgft/article/view/868 2346-3775 https://doi.org/10.17138/tgft(9)171-181 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 CIAT Tropical Grasslands-Forrajes Tropicales 9 (2) : 171-181. (2021) |
| spellingShingle | Panicum Coloratum Fitomejoramiento Tolerancia a la Sal Variación Genética Fenotipos Plant Breeding Salt Tolerance Genetic Variation Phenotypes Genetic Gain Mejora Genética Pittaro, Gabriela Lifschitz, Mauro Ezequiel Sanchez, Miguel Alejandro Bustos, Dolores Angela Otondo, Jose Tomas, Maria Andrea Prospective genetic gain to improve salinity tolerance in a population of Panicum coloratum var. coloratum with two different selection methods |
| title | Prospective genetic gain to improve salinity tolerance in a population of Panicum coloratum var. coloratum with two different selection methods |
| title_full | Prospective genetic gain to improve salinity tolerance in a population of Panicum coloratum var. coloratum with two different selection methods |
| title_fullStr | Prospective genetic gain to improve salinity tolerance in a population of Panicum coloratum var. coloratum with two different selection methods |
| title_full_unstemmed | Prospective genetic gain to improve salinity tolerance in a population of Panicum coloratum var. coloratum with two different selection methods |
| title_short | Prospective genetic gain to improve salinity tolerance in a population of Panicum coloratum var. coloratum with two different selection methods |
| title_sort | prospective genetic gain to improve salinity tolerance in a population of panicum coloratum var coloratum with two different selection methods |
| topic | Panicum Coloratum Fitomejoramiento Tolerancia a la Sal Variación Genética Fenotipos Plant Breeding Salt Tolerance Genetic Variation Phenotypes Genetic Gain Mejora Genética |
| url | http://hdl.handle.net/20.500.12123/9882 https://www.tropicalgrasslands.info/index.php/tgft/article/view/868 https://doi.org/10.17138/tgft(9)171-181 |
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