Genetics of Growth and Stem Straightness Traits in Pinus taeda in Argentina: Exploring Genetic Competition Across Ages and Sites
Traditional quantitative genetic models in forestry often overlook the influence of an individual’s genes on neighboring trees. However, genetic competition models help bridge this gap. Competition varies among populations, over time, and across environments, yet forest breeders rarely monitor these...
| Autores principales: | , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
| Publicado: |
MDPI
2025
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| Acceso en línea: | http://hdl.handle.net/20.500.12123/22511 https://www.mdpi.com/1999-4907/16/4/675 https://doi.org/10.3390/f16040675 |
| _version_ | 1855486953252716544 |
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| author | Belaber, Ector Borralho, Nuno M. Cappa, Eduardo Pablo |
| author_browse | Belaber, Ector Borralho, Nuno M. Cappa, Eduardo Pablo |
| author_facet | Belaber, Ector Borralho, Nuno M. Cappa, Eduardo Pablo |
| author_sort | Belaber, Ector |
| collection | INTA Digital |
| description | Traditional quantitative genetic models in forestry often overlook the influence of an individual’s genes on neighboring trees. However, genetic competition models help bridge this gap. Competition varies among populations, over time, and across environments, yet forest breeders rarely monitor these dynamics or their effects on selected genotypes. We investigated the effects of competition on genetic variances, breeding value accuracy, and selection response in 14 Pinus taeda L. progeny tests using spatial (Spa) and spatial-competition (Spa-Comp) individual-tree mixed models. Our analysis covered traits such as diameter at breast height (DBH), total height (TH), and stem straightness (STR) across ages (3–21 years) and sites (altitude, soil texture, drainage). DBH was more affected by genetic competition than TH and STR, with effects varying across ages and sites. Directcompetition genetic correlations were negative for DBH from age 5 onward but positive for
TH, reducing total heritable variance for DBH (<43.1%) while increasing for TH (<95.7%). Genetic competition accounted for less than 26% of direct additive variance. For DBH, the Spa-Comp model slightly improved breeding value accuracy (<~4%), while Spa inflated selection esponse (<3.83 percentage points), yet rank changes were minimal (common selected trees > 89%). These findings indicate that while ompetition inflates genetic gains, its impact on selection efficiency is minimal. |
| format | Artículo |
| id | INTA22511 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | MDPI |
| publisherStr | MDPI |
| record_format | dspace |
| spelling | INTA225112025-06-05T11:03:25Z Genetics of Growth and Stem Straightness Traits in Pinus taeda in Argentina: Exploring Genetic Competition Across Ages and Sites Belaber, Ector Borralho, Nuno M. Cappa, Eduardo Pablo Pinus Pinus taeda Genética Fitomejoramiento Argentina Genetics Plant Breeding Traditional quantitative genetic models in forestry often overlook the influence of an individual’s genes on neighboring trees. However, genetic competition models help bridge this gap. Competition varies among populations, over time, and across environments, yet forest breeders rarely monitor these dynamics or their effects on selected genotypes. We investigated the effects of competition on genetic variances, breeding value accuracy, and selection response in 14 Pinus taeda L. progeny tests using spatial (Spa) and spatial-competition (Spa-Comp) individual-tree mixed models. Our analysis covered traits such as diameter at breast height (DBH), total height (TH), and stem straightness (STR) across ages (3–21 years) and sites (altitude, soil texture, drainage). DBH was more affected by genetic competition than TH and STR, with effects varying across ages and sites. Directcompetition genetic correlations were negative for DBH from age 5 onward but positive for TH, reducing total heritable variance for DBH (<43.1%) while increasing for TH (<95.7%). Genetic competition accounted for less than 26% of direct additive variance. For DBH, the Spa-Comp model slightly improved breeding value accuracy (<~4%), while Spa inflated selection esponse (<3.83 percentage points), yet rank changes were minimal (common selected trees > 89%). These findings indicate that while ompetition inflates genetic gains, its impact on selection efficiency is minimal. EEA Montecarlo Fil: Belaber, Ector C. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Montecarlo; Argentina Fil: Borralho, N. RAIZ Forest and Paper Research Institute; Portugal Fil: Cappa, Eduardo. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Recursos Biológicos; Argentina Fil: Cappa, Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina 2025-06-05T10:51:39Z 2025-06-05T10:51:39Z 2025-04-12 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/22511 https://www.mdpi.com/1999-4907/16/4/675 Belaber, E.C.; Borralho, N.M.; Cappa, E.P. Genetics of Growth and Stem Straightness Traits in Pinus taeda in Argentina: Exploring Genetic Competition Across Ages and Sites. Forests 2025, 16, 675. https://doi.org/ 10.3390/f16040675 1999-4907 https://doi.org/10.3390/f16040675 eng info:eu-repograntAgreement/INTA/2023-PE-L01-I067, Mejoramiento genético y silvicultura de plantaciones para la producción sostenible de productos forestales para distintos destinos industriales 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 MDPI Forests 16 (4) : 675. (April 2025) |
| spellingShingle | Pinus Pinus taeda Genética Fitomejoramiento Argentina Genetics Plant Breeding Belaber, Ector Borralho, Nuno M. Cappa, Eduardo Pablo Genetics of Growth and Stem Straightness Traits in Pinus taeda in Argentina: Exploring Genetic Competition Across Ages and Sites |
| title | Genetics of Growth and Stem Straightness Traits in Pinus taeda in Argentina: Exploring Genetic Competition Across Ages and Sites |
| title_full | Genetics of Growth and Stem Straightness Traits in Pinus taeda in Argentina: Exploring Genetic Competition Across Ages and Sites |
| title_fullStr | Genetics of Growth and Stem Straightness Traits in Pinus taeda in Argentina: Exploring Genetic Competition Across Ages and Sites |
| title_full_unstemmed | Genetics of Growth and Stem Straightness Traits in Pinus taeda in Argentina: Exploring Genetic Competition Across Ages and Sites |
| title_short | Genetics of Growth and Stem Straightness Traits in Pinus taeda in Argentina: Exploring Genetic Competition Across Ages and Sites |
| title_sort | genetics of growth and stem straightness traits in pinus taeda in argentina exploring genetic competition across ages and sites |
| topic | Pinus Pinus taeda Genética Fitomejoramiento Argentina Genetics Plant Breeding |
| url | http://hdl.handle.net/20.500.12123/22511 https://www.mdpi.com/1999-4907/16/4/675 https://doi.org/10.3390/f16040675 |
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