Heterosis for resistance to insect herbivores in a 3-line hybrid rice system
Three-line hybrid rice is produced by crossing male sterile (A line) rice with a fertility-restorer (R line). Fertile lines (B lines) are also required to maintain A line seed for breeding programs. We used a range of hybrids and their parental lines to assess the frequency and nature of heterosis f...
| Main Authors: | , , , , , |
|---|---|
| Format: | Journal Article |
| Language: | Inglés |
| Published: |
MDPI
2024
|
| Online Access: | https://hdl.handle.net/10568/163832 |
| _version_ | 1855531591527301120 |
|---|---|
| author | Horgan, Finbarr G. Bernal, Carmencita C. Ramal, Angelee F. Almazan, Maria Liberty P. Mundaca, Enrique A. Crisol-Martínez, Eduardo |
| author_browse | Almazan, Maria Liberty P. Bernal, Carmencita C. Crisol-Martínez, Eduardo Horgan, Finbarr G. Mundaca, Enrique A. Ramal, Angelee F. |
| author_facet | Horgan, Finbarr G. Bernal, Carmencita C. Ramal, Angelee F. Almazan, Maria Liberty P. Mundaca, Enrique A. Crisol-Martínez, Eduardo |
| author_sort | Horgan, Finbarr G. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Three-line hybrid rice is produced by crossing male sterile (A line) rice with a fertility-restorer (R line). Fertile lines (B lines) are also required to maintain A line seed for breeding programs. We used a range of hybrids and their parental lines to assess the frequency and nature of heterosis for resistance to the whitebacked planthopper (Sogatella furcifera), brown planthopper (Nilaparvata lugens) and yellow stemborer (Scirpophaga incertulas). Heterosis is defined as trait improvement above the average of the parental lines as a result of outbreeding. Based on the results from a greenhouse study that challenged hybrids and their parental lines with each herbivore species, we found that susceptibility to planthoppers was associated with one of the eight A lines tested, but resistance was improved by crossing with a relatively resistant restorer. Higher frequencies of heterosis for susceptibility in comparisons between hybrids and their B lines suggest that susceptibility was not related to the cytoplasmic genomes of the associated sterile A lines. Furthermore, because none of the parental lines possessed currently effective resistance genes, improved resistance against planthoppers was probably due to quantitative resistance. In a related field trial, hybrids had generally higher yields than their fertile parents and often produced larger grain; however, they were often more susceptible to stemborers, leaffolders (Cnaphalocrocis medinalis) and other caterpillars (Rivula atimeta). This was largely a consequence of hybrid heterosis for plant biomass and was strongly affected by crop duration. We make a series of recommendations to improve hybrid breeding to reduce the risks of herbivore damage. |
| format | Journal Article |
| id | CGSpace163832 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | MDPI |
| publisherStr | MDPI |
| record_format | dspace |
| spelling | CGSpace1638322025-12-08T10:29:22Z Heterosis for resistance to insect herbivores in a 3-line hybrid rice system Horgan, Finbarr G. Bernal, Carmencita C. Ramal, Angelee F. Almazan, Maria Liberty P. Mundaca, Enrique A. Crisol-Martínez, Eduardo Three-line hybrid rice is produced by crossing male sterile (A line) rice with a fertility-restorer (R line). Fertile lines (B lines) are also required to maintain A line seed for breeding programs. We used a range of hybrids and their parental lines to assess the frequency and nature of heterosis for resistance to the whitebacked planthopper (Sogatella furcifera), brown planthopper (Nilaparvata lugens) and yellow stemborer (Scirpophaga incertulas). Heterosis is defined as trait improvement above the average of the parental lines as a result of outbreeding. Based on the results from a greenhouse study that challenged hybrids and their parental lines with each herbivore species, we found that susceptibility to planthoppers was associated with one of the eight A lines tested, but resistance was improved by crossing with a relatively resistant restorer. Higher frequencies of heterosis for susceptibility in comparisons between hybrids and their B lines suggest that susceptibility was not related to the cytoplasmic genomes of the associated sterile A lines. Furthermore, because none of the parental lines possessed currently effective resistance genes, improved resistance against planthoppers was probably due to quantitative resistance. In a related field trial, hybrids had generally higher yields than their fertile parents and often produced larger grain; however, they were often more susceptible to stemborers, leaffolders (Cnaphalocrocis medinalis) and other caterpillars (Rivula atimeta). This was largely a consequence of hybrid heterosis for plant biomass and was strongly affected by crop duration. We make a series of recommendations to improve hybrid breeding to reduce the risks of herbivore damage. 2024-02-28 2024-12-19T12:53:04Z 2024-12-19T12:53:04Z Journal Article https://hdl.handle.net/10568/163832 en Open Access MDPI Horgan, Finbarr G.; Bernal, Carmencita C.; Ramal, Angelee F.; Almazan, Maria Liberty P.; Mundaca, Enrique A. and Crisol-Martínez, Eduardo. 2024. Heterosis for resistance to insect herbivores in a 3-line hybrid rice system. Insects, Volume 15 no. 3 p. 164 |
| spellingShingle | Horgan, Finbarr G. Bernal, Carmencita C. Ramal, Angelee F. Almazan, Maria Liberty P. Mundaca, Enrique A. Crisol-Martínez, Eduardo Heterosis for resistance to insect herbivores in a 3-line hybrid rice system |
| title | Heterosis for resistance to insect herbivores in a 3-line hybrid rice system |
| title_full | Heterosis for resistance to insect herbivores in a 3-line hybrid rice system |
| title_fullStr | Heterosis for resistance to insect herbivores in a 3-line hybrid rice system |
| title_full_unstemmed | Heterosis for resistance to insect herbivores in a 3-line hybrid rice system |
| title_short | Heterosis for resistance to insect herbivores in a 3-line hybrid rice system |
| title_sort | heterosis for resistance to insect herbivores in a 3 line hybrid rice system |
| url | https://hdl.handle.net/10568/163832 |
| work_keys_str_mv | AT horganfinbarrg heterosisforresistancetoinsectherbivoresina3linehybridricesystem AT bernalcarmencitac heterosisforresistancetoinsectherbivoresina3linehybridricesystem AT ramalangeleef heterosisforresistancetoinsectherbivoresina3linehybridricesystem AT almazanmarialibertyp heterosisforresistancetoinsectherbivoresina3linehybridricesystem AT mundacaenriquea heterosisforresistancetoinsectherbivoresina3linehybridricesystem AT crisolmartinezeduardo heterosisforresistancetoinsectherbivoresina3linehybridricesystem |