Estimation of genetic gain for resistance to spittlebugs (Hemiptera: Cercopidae) in the Interspecific Urochloa CIAT Breeding Program using historical data
Grasses from the genus Urochloa are sown worldwide throughout the tropics and subtropics. Urochloa grasses have different attributes that make them an important forage resource, however susceptibility to abiotic and biotic stresses are also common. In order to develop a superior forage source, the i...
| Autores principales: | , , , , , , |
|---|---|
| Formato: | Ponencia |
| Lenguaje: | Inglés |
| Publicado: |
Bioversity International and the International Center for Tropical Agriculture
2022
|
| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/124963 |
| _version_ | 1855521554120572928 |
|---|---|
| author | Hernández, Luis Miguel Sandoval, Karol Aparicio, Johan Steven Ariza, Daniel Espitia, Paula A. Castiblanco, Valheria Jauregui, Rosa |
| author_browse | Aparicio, Johan Steven Ariza, Daniel Castiblanco, Valheria Espitia, Paula A. Hernández, Luis Miguel Jauregui, Rosa Sandoval, Karol |
| author_facet | Hernández, Luis Miguel Sandoval, Karol Aparicio, Johan Steven Ariza, Daniel Espitia, Paula A. Castiblanco, Valheria Jauregui, Rosa |
| author_sort | Hernández, Luis Miguel |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Grasses from the genus Urochloa are sown worldwide throughout the tropics and subtropics. Urochloa grasses have different attributes that make them an important forage resource, however susceptibility to abiotic and biotic stresses are also common. In order to develop a superior forage source, the interspecific Urochloa breeding programme was started at CIAT in the late 1980’s combining desirable attributes of the three most important species signalgrass (U. decumbens), palisadegrass (U. brizantha) and ruzigrass (U. ruziziensis). One of the main targets of the breeding programme is to continuously improve resistance to spittlebugs (Hemiptera: Cercopidae), which cause high economic damage in livestock systems throughout tropical and subtropical America. In the recurrent selection breeding scheme, seven successive cycles of selection of the apomictic hybrids and the parental sexual lines were screened for resistance to four species at the nymphal stage, measured as damage to plants based on visual scoring (0-5), using a high throughput methodology in the greenhouse. A means to measure the response to selection of a breeding programme is to estimate the rate of genetic gain for the target traits. The assembly of historical data from founders of the breeding programme and seven generations of the synthetic population of female parents in a linear mixed model, allowed the quantification of the rate of genetic gain for the improvement in resistance to spittlebugs. This rate was estimated as the slope of the line obtained by plotting the values of resistance across generations. The analysis shows a rapid and simultaneous increase in the resistance against three species of spittlebug nymphs: Aenolamia varia, A. reducta and Zulia carbonaria after seven cycles of selection. Resistance to Prosapia simulans was screened in only one cycle showing some level of resistance in the genotypes that can be exploited for improvement in the future. The success in the continuous improvement for spittlebug resistance can be explained by the fact that within a breeding cycle, parents are screened and selected based on their resistance level to spittlebug as part of the parental population improvement. |
| format | Ponencia |
| id | CGSpace124963 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | Bioversity International and the International Center for Tropical Agriculture |
| publisherStr | Bioversity International and the International Center for Tropical Agriculture |
| record_format | dspace |
| spelling | CGSpace1249632025-12-08T10:29:22Z Estimation of genetic gain for resistance to spittlebugs (Hemiptera: Cercopidae) in the Interspecific Urochloa CIAT Breeding Program using historical data Hernández, Luis Miguel Sandoval, Karol Aparicio, Johan Steven Ariza, Daniel Espitia, Paula A. Castiblanco, Valheria Jauregui, Rosa forage plant breeding genetic gain pest resistance cercopidae forrajes fitomejoramiento mejora genética Grasses from the genus Urochloa are sown worldwide throughout the tropics and subtropics. Urochloa grasses have different attributes that make them an important forage resource, however susceptibility to abiotic and biotic stresses are also common. In order to develop a superior forage source, the interspecific Urochloa breeding programme was started at CIAT in the late 1980’s combining desirable attributes of the three most important species signalgrass (U. decumbens), palisadegrass (U. brizantha) and ruzigrass (U. ruziziensis). One of the main targets of the breeding programme is to continuously improve resistance to spittlebugs (Hemiptera: Cercopidae), which cause high economic damage in livestock systems throughout tropical and subtropical America. In the recurrent selection breeding scheme, seven successive cycles of selection of the apomictic hybrids and the parental sexual lines were screened for resistance to four species at the nymphal stage, measured as damage to plants based on visual scoring (0-5), using a high throughput methodology in the greenhouse. A means to measure the response to selection of a breeding programme is to estimate the rate of genetic gain for the target traits. The assembly of historical data from founders of the breeding programme and seven generations of the synthetic population of female parents in a linear mixed model, allowed the quantification of the rate of genetic gain for the improvement in resistance to spittlebugs. This rate was estimated as the slope of the line obtained by plotting the values of resistance across generations. The analysis shows a rapid and simultaneous increase in the resistance against three species of spittlebug nymphs: Aenolamia varia, A. reducta and Zulia carbonaria after seven cycles of selection. Resistance to Prosapia simulans was screened in only one cycle showing some level of resistance in the genotypes that can be exploited for improvement in the future. The success in the continuous improvement for spittlebug resistance can be explained by the fact that within a breeding cycle, parents are screened and selected based on their resistance level to spittlebug as part of the parental population improvement. 2022-09-15 2022-10-10T12:19:18Z 2022-10-10T12:19:18Z Presentation https://hdl.handle.net/10568/124963 en Open Access application/pdf Bioversity International and the International Center for Tropical Agriculture Hernández, L.M.; Sandoval, K.; Aparicio, J.; Ariza, D.; Espitia, P.; Castiblanco, V.; Jauregui, R. (2022) Estimation of genetic gain for resistance to spittlebugs (Hemiptera: Cercopidae) in the Interspecific Urochloa CIAT Breeding Program using historical data. Presentation prepared for Tropentag 2022 - Can Agroecological Farming Feed the World? Farmers' and Academia's Views. Prague, Czech Republic, 14-16 September 2022. Cali (Colombia): Alliance of Bioversity and CIAT. 18 sl. |
| spellingShingle | forage plant breeding genetic gain pest resistance cercopidae forrajes fitomejoramiento mejora genética Hernández, Luis Miguel Sandoval, Karol Aparicio, Johan Steven Ariza, Daniel Espitia, Paula A. Castiblanco, Valheria Jauregui, Rosa Estimation of genetic gain for resistance to spittlebugs (Hemiptera: Cercopidae) in the Interspecific Urochloa CIAT Breeding Program using historical data |
| title | Estimation of genetic gain for resistance to spittlebugs (Hemiptera: Cercopidae) in the Interspecific Urochloa CIAT Breeding Program using historical data |
| title_full | Estimation of genetic gain for resistance to spittlebugs (Hemiptera: Cercopidae) in the Interspecific Urochloa CIAT Breeding Program using historical data |
| title_fullStr | Estimation of genetic gain for resistance to spittlebugs (Hemiptera: Cercopidae) in the Interspecific Urochloa CIAT Breeding Program using historical data |
| title_full_unstemmed | Estimation of genetic gain for resistance to spittlebugs (Hemiptera: Cercopidae) in the Interspecific Urochloa CIAT Breeding Program using historical data |
| title_short | Estimation of genetic gain for resistance to spittlebugs (Hemiptera: Cercopidae) in the Interspecific Urochloa CIAT Breeding Program using historical data |
| title_sort | estimation of genetic gain for resistance to spittlebugs hemiptera cercopidae in the interspecific urochloa ciat breeding program using historical data |
| topic | forage plant breeding genetic gain pest resistance cercopidae forrajes fitomejoramiento mejora genética |
| url | https://hdl.handle.net/10568/124963 |
| work_keys_str_mv | AT hernandezluismiguel estimationofgeneticgainforresistancetospittlebugshemipteracercopidaeintheinterspecificurochloaciatbreedingprogramusinghistoricaldata AT sandovalkarol estimationofgeneticgainforresistancetospittlebugshemipteracercopidaeintheinterspecificurochloaciatbreedingprogramusinghistoricaldata AT apariciojohansteven estimationofgeneticgainforresistancetospittlebugshemipteracercopidaeintheinterspecificurochloaciatbreedingprogramusinghistoricaldata AT arizadaniel estimationofgeneticgainforresistancetospittlebugshemipteracercopidaeintheinterspecificurochloaciatbreedingprogramusinghistoricaldata AT espitiapaulaa estimationofgeneticgainforresistancetospittlebugshemipteracercopidaeintheinterspecificurochloaciatbreedingprogramusinghistoricaldata AT castiblancovalheria estimationofgeneticgainforresistancetospittlebugshemipteracercopidaeintheinterspecificurochloaciatbreedingprogramusinghistoricaldata AT jaureguirosa estimationofgeneticgainforresistancetospittlebugshemipteracercopidaeintheinterspecificurochloaciatbreedingprogramusinghistoricaldata |