Hipótesis de la exclusión de linajes: Una alternativa para el desarrollo de cultivares de arroz con resistencia durable a Pyricularia grisea (Sacc) en Colombia
Rice blast caused by the fungus Pyricularia grisea (Sacc.) is the most important disease of rice crops throughout the world. The development of resistant varieties is the method preferred by breeders for the control of the disease; however, varieties tend to become susceptible in periods ranging fro...
| Main Authors: | , , , , |
|---|---|
| Format: | Journal Article |
| Language: | Español |
| Published: |
1999
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/44336 |
| _version_ | 1855530797585399808 |
|---|---|
| author | Prado Patiño, Gustavo A. Correa Victoria, Fernando J. Aricapa, María Girlena Tulande Valencia, Edgar Escobar, F. |
| author_browse | Aricapa, María Girlena Correa Victoria, Fernando J. Escobar, F. Prado Patiño, Gustavo A. Tulande Valencia, Edgar |
| author_facet | Prado Patiño, Gustavo A. Correa Victoria, Fernando J. Aricapa, María Girlena Tulande Valencia, Edgar Escobar, F. |
| author_sort | Prado Patiño, Gustavo A. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Rice blast caused by the fungus Pyricularia grisea (Sacc.) is the most important disease of rice crops throughout the world. The development of resistant varieties is the method preferred by breeders for the control of the disease; however, varieties tend to become susceptible in periods ranging from one to two years after their deployment. The great variability of the pathogen is mentioned as the cause o F the breaking down of the resistance. More than 50 races grouped mainly into six genetic families named from SRL-1 to SRL-6, have been reported to exist in Colombia. The combination of complementary resistance genes between genetic families in varieties of more durable resistance conveniently evaluated is the correct way. This research, carried out under controlled greenhouse and field conditions, has been to study the reaction to the pathogen populations in Colombia of the progenies resulting from the cross between C 101 LAG x C 101 A51 from IRRI which contain the Pi-1 and the Pi-2 resistance genes, respectively. Pi-1 gene showed compatibility with the SRL-5 genetic families and the Pi-2 gene with genetic families 1, 2, 4, and 6. A total of 109 lines obtained from the simple cross between the two isogenic lines were tested up to the F6 generation for their reaction to rice blast. These lines were inoculated with 19 isolates, 15 of which represent the six genetic families of the fungus, the four remaining isolates had not been previously classified. The results obtained showed that 19 lines (17.4%) resulted to be resistant under field conditions as well as to the six lineages of the greenhouse inoculations, indicating that the Pi-1 and Pi-2 gene combination confers resistance to the whole P. grisea population of Colombia. The lines selected in this study for the complete resistance to Pyricularia must be tested in further generations in order to confirm the stability of resistance to blast, and should be incorporated in breeding programs for future commercials varieties. |
| format | Journal Article |
| id | CGSpace44336 |
| institution | CGIAR Consortium |
| language | Español |
| publishDate | 1999 |
| publishDateRange | 1999 |
| publishDateSort | 1999 |
| record_format | dspace |
| spelling | CGSpace443362025-11-12T05:56:58Z Hipótesis de la exclusión de linajes: Una alternativa para el desarrollo de cultivares de arroz con resistencia durable a Pyricularia grisea (Sacc) en Colombia Prado Patiño, Gustavo A. Correa Victoria, Fernando J. Aricapa, María Girlena Tulande Valencia, Edgar Escobar, F. oryza sativa necrosis progeny insulation blights pyricularia grisea pathogens progenie aislamiento tizón organismos patógenos Rice blast caused by the fungus Pyricularia grisea (Sacc.) is the most important disease of rice crops throughout the world. The development of resistant varieties is the method preferred by breeders for the control of the disease; however, varieties tend to become susceptible in periods ranging from one to two years after their deployment. The great variability of the pathogen is mentioned as the cause o F the breaking down of the resistance. More than 50 races grouped mainly into six genetic families named from SRL-1 to SRL-6, have been reported to exist in Colombia. The combination of complementary resistance genes between genetic families in varieties of more durable resistance conveniently evaluated is the correct way. This research, carried out under controlled greenhouse and field conditions, has been to study the reaction to the pathogen populations in Colombia of the progenies resulting from the cross between C 101 LAG x C 101 A51 from IRRI which contain the Pi-1 and the Pi-2 resistance genes, respectively. Pi-1 gene showed compatibility with the SRL-5 genetic families and the Pi-2 gene with genetic families 1, 2, 4, and 6. A total of 109 lines obtained from the simple cross between the two isogenic lines were tested up to the F6 generation for their reaction to rice blast. These lines were inoculated with 19 isolates, 15 of which represent the six genetic families of the fungus, the four remaining isolates had not been previously classified. The results obtained showed that 19 lines (17.4%) resulted to be resistant under field conditions as well as to the six lineages of the greenhouse inoculations, indicating that the Pi-1 and Pi-2 gene combination confers resistance to the whole P. grisea population of Colombia. The lines selected in this study for the complete resistance to Pyricularia must be tested in further generations in order to confirm the stability of resistance to blast, and should be incorporated in breeding programs for future commercials varieties. El añublo del arroz causado por Pyricularia grisea (Sacc) es la principal enfermedad del cultivo en todo el mundo. El desarrollo dc variedades resistentes es el método preferido para el control de la enfermedad; sin embargo, las variedades pierden su resistencia en períodos de 1 a 2 años después de su liberación debido a la gran variabilidad del patógeno. En Colombia se han reportado más de 50 razas, representadas principalmente en seis familias genéticas denominadas SRL-1 a SRL-6., las cuales deben ser contrarrestadas mediante la combinación de genes de resistencia complementarios a las diferentes familias genéticas del hongo, incorporados en variedades debidamente evaluadas. En la presente investigación se planeó estudiar bajo condiciones controladas de invernadero y campo la reacción de las progenies del cruce de las líneas isogénicas C 101 LAC y C 101 A51 del IRRI a la población del patógeno en Colombia. Las líneas poseen los genes de resistencia Pi-1 y Pi-2 respectivamente. El gen Pi-1 muestra compatibilidad con la familia genética SRL-5 y el Pi- 2 muestra compatibilidad con las familias genéticas SRL-1, SRL-2, SRL-4 y SRL. Durante el estudio se analizaron hasta la F6 108 lineas provenientes del cruce simple C 101 LAC x C 101 A51 por su reacción al añublo. Las lineas se inocularon con 19 aislamientos, 15 de ellos representativos de las seis familias genéticas del hongos y 4 no identificados. Los resultados obtenidos indicaron que 19 líneas ( 17,4% ) presentaron resistencia tanto en el campo como a los seis linajes en las inoculaciones hechas en invernadero, demostrando que la combinación de los genes Pi-1 y Pi-2 confieren resistencia a toda la población de P. grisea en Colombia. Se recomienda que las líneas seleccionadas por su resistencia completa a Pyricutana en este estudio se deben seguir evaluando en generaciones posteriores para corroborar la estabilidad de la resistencia al añublo y luego incorporarlas en programas de mejoramiento. 1999 2014-10-02T08:33:37Z 2014-10-02T08:33:37Z Journal Article https://hdl.handle.net/10568/44336 es Open Access application/pdf |
| spellingShingle | oryza sativa necrosis progeny insulation blights pyricularia grisea pathogens progenie aislamiento tizón organismos patógenos Prado Patiño, Gustavo A. Correa Victoria, Fernando J. Aricapa, María Girlena Tulande Valencia, Edgar Escobar, F. Hipótesis de la exclusión de linajes: Una alternativa para el desarrollo de cultivares de arroz con resistencia durable a Pyricularia grisea (Sacc) en Colombia |
| title | Hipótesis de la exclusión de linajes: Una alternativa para el desarrollo de cultivares de arroz con resistencia durable a Pyricularia grisea (Sacc) en Colombia |
| title_full | Hipótesis de la exclusión de linajes: Una alternativa para el desarrollo de cultivares de arroz con resistencia durable a Pyricularia grisea (Sacc) en Colombia |
| title_fullStr | Hipótesis de la exclusión de linajes: Una alternativa para el desarrollo de cultivares de arroz con resistencia durable a Pyricularia grisea (Sacc) en Colombia |
| title_full_unstemmed | Hipótesis de la exclusión de linajes: Una alternativa para el desarrollo de cultivares de arroz con resistencia durable a Pyricularia grisea (Sacc) en Colombia |
| title_short | Hipótesis de la exclusión de linajes: Una alternativa para el desarrollo de cultivares de arroz con resistencia durable a Pyricularia grisea (Sacc) en Colombia |
| title_sort | hipotesis de la exclusion de linajes una alternativa para el desarrollo de cultivares de arroz con resistencia durable a pyricularia grisea sacc en colombia |
| topic | oryza sativa necrosis progeny insulation blights pyricularia grisea pathogens progenie aislamiento tizón organismos patógenos |
| url | https://hdl.handle.net/10568/44336 |
| work_keys_str_mv | AT pradopatinogustavoa hipotesisdelaexclusiondelinajesunaalternativaparaeldesarrollodecultivaresdearrozconresistenciadurableapyriculariagriseasaccencolombia AT correavictoriafernandoj hipotesisdelaexclusiondelinajesunaalternativaparaeldesarrollodecultivaresdearrozconresistenciadurableapyriculariagriseasaccencolombia AT aricapamariagirlena hipotesisdelaexclusiondelinajesunaalternativaparaeldesarrollodecultivaresdearrozconresistenciadurableapyriculariagriseasaccencolombia AT tulandevalenciaedgar hipotesisdelaexclusiondelinajesunaalternativaparaeldesarrollodecultivaresdearrozconresistenciadurableapyriculariagriseasaccencolombia AT escobarf hipotesisdelaexclusiondelinajesunaalternativaparaeldesarrollodecultivaresdearrozconresistenciadurableapyriculariagriseasaccencolombia |