Responses of Megathyrsus maximus accessions under shaded conditions
Megathyrsus maximus is a species widely used as forage in livestock systems due to its high yield, good nutritional quality, and easy propagation. Knowing the response of the genetic diversity of the species to growth under shade is important to determine its potential use in silvopastoral systems,...
| Autores principales: | , |
|---|---|
| Formato: | Informe técnico |
| Lenguaje: | Inglés |
| Publicado: |
International Center for Tropical Agriculture
2023
|
| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/135706 |
| _version_ | 1855527884431556608 |
|---|---|
| author | Mayorga, Mildred Cardoso, Juan Andrés |
| author_browse | Cardoso, Juan Andrés Mayorga, Mildred |
| author_facet | Mayorga, Mildred Cardoso, Juan Andrés |
| author_sort | Mayorga, Mildred |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Megathyrsus maximus is a species widely used as forage in livestock systems due to its high yield, good nutritional quality, and easy propagation. Knowing the response of the genetic diversity of the species to growth under shade is important to determine its potential use in silvopastoral systems, which are a sustainable alternative to mitigate the negative impacts of forage production in monoculture systems on soil health, animal welfare and the environment. To evaluate the response of M. maximus genotypes to shade conditions, 33 genotypes were planted in two conditions, without shade and with 75% shade. The response was evaluated in gas exchange, chlorophyll fluorescence, SPAD index, stem length, biomass partitioning, leaf area, number of leaves and specific leaf area. Under shade conditions, plants showed lower stomatal conductance, lower transpiration, higher photochemical efficiency of PSII operation, higher leaf area, lower number of leaves, lower root: shoot ratio, higher specific leaf area, higher SPAD index and higher stem length. The genotypes that showed the greatest phenotypic plasticity to adapt to the shade condition were CIAT16021, CIAT6299, CIAT6868 and CIAT16060. |
| format | Informe técnico |
| id | CGSpace135706 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | International Center for Tropical Agriculture |
| publisherStr | International Center for Tropical Agriculture |
| record_format | dspace |
| spelling | CGSpace1357062025-11-05T11:53:53Z Responses of Megathyrsus maximus accessions under shaded conditions Mayorga, Mildred Cardoso, Juan Andrés biomass forage phenotypes plant genetic resources panicum maximum shade Megathyrsus maximus is a species widely used as forage in livestock systems due to its high yield, good nutritional quality, and easy propagation. Knowing the response of the genetic diversity of the species to growth under shade is important to determine its potential use in silvopastoral systems, which are a sustainable alternative to mitigate the negative impacts of forage production in monoculture systems on soil health, animal welfare and the environment. To evaluate the response of M. maximus genotypes to shade conditions, 33 genotypes were planted in two conditions, without shade and with 75% shade. The response was evaluated in gas exchange, chlorophyll fluorescence, SPAD index, stem length, biomass partitioning, leaf area, number of leaves and specific leaf area. Under shade conditions, plants showed lower stomatal conductance, lower transpiration, higher photochemical efficiency of PSII operation, higher leaf area, lower number of leaves, lower root: shoot ratio, higher specific leaf area, higher SPAD index and higher stem length. The genotypes that showed the greatest phenotypic plasticity to adapt to the shade condition were CIAT16021, CIAT6299, CIAT6868 and CIAT16060. 2023-12 2023-12-21T08:57:28Z 2023-12-21T08:57:28Z Report https://hdl.handle.net/10568/135706 en Open Access application/pdf International Center for Tropical Agriculture Mayorga, M.; Cardoso, J.A. (2023) Responses of Megathyrsus maximus accessions under shaded conditions. Cali (Colombia): International Center for Tropical Agriculture. 15 p. |
| spellingShingle | biomass forage phenotypes plant genetic resources panicum maximum shade Mayorga, Mildred Cardoso, Juan Andrés Responses of Megathyrsus maximus accessions under shaded conditions |
| title | Responses of Megathyrsus maximus accessions under shaded conditions |
| title_full | Responses of Megathyrsus maximus accessions under shaded conditions |
| title_fullStr | Responses of Megathyrsus maximus accessions under shaded conditions |
| title_full_unstemmed | Responses of Megathyrsus maximus accessions under shaded conditions |
| title_short | Responses of Megathyrsus maximus accessions under shaded conditions |
| title_sort | responses of megathyrsus maximus accessions under shaded conditions |
| topic | biomass forage phenotypes plant genetic resources panicum maximum shade |
| url | https://hdl.handle.net/10568/135706 |
| work_keys_str_mv | AT mayorgamildred responsesofmegathyrsusmaximusaccessionsundershadedconditions AT cardosojuanandres responsesofmegathyrsusmaximusaccessionsundershadedconditions |