Marker assisted pyramiding of QTLs for heat tolerance and escape upgrades heat resilience in rice (Oryza sativa L.)
High temperature at flowering stage of rice causes low spikelet fertility and low yield. To cope with high temperature stress brought by climate change, two strategies were proposed to develop heat-resilient rice varieties. One is to escape the high temperature by flowering early in the morning, ano...
| Autores principales: | , , , , , , , , |
|---|---|
| Formato: | Preprint |
| Lenguaje: | Inglés |
| Publicado: |
Research Square Platform LLC
2021
|
| Acceso en línea: | https://hdl.handle.net/10568/164177 |
| _version_ | 1855525949370531840 |
|---|---|
| author | Ye, Changrong Ishimaru, Tsutomu Lambio, Leslie Li, Le Long, Yu He, Zhizhou Htun, Than Myint Tang, Shunxue Su, Zhenxi |
| author_browse | He, Zhizhou Htun, Than Myint Ishimaru, Tsutomu Lambio, Leslie Li, Le Long, Yu Su, Zhenxi Tang, Shunxue Ye, Changrong |
| author_facet | Ye, Changrong Ishimaru, Tsutomu Lambio, Leslie Li, Le Long, Yu He, Zhizhou Htun, Than Myint Tang, Shunxue Su, Zhenxi |
| author_sort | Ye, Changrong |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | High temperature at flowering stage of rice causes low spikelet fertility and low yield. To cope with high temperature stress brought by climate change, two strategies were proposed to develop heat-resilient rice varieties. One is to escape the high temperature by flowering early in the morning, another is to enhance tolerance to high temperature stress per se. Two promising QTLs for early morning flowering (qEMF3) and heat tolerance (qHTSF4.1) were introgressed into IR64 background, and near isogenic lines (NILs) IR64+qEMF3 (IR64EMF3) and IR64+qHTSF4.1 (IR64HT4) were developed in previous studies. In this study, a QTL pyramiding line IR64+qHTSF4.1+qEMF3 (IR64HT4EMF3) was developed by marker assisted selection of the progenies of previous NILs. The NILs were subjected to different high temperature regimes in the indoor growth chambers and different locations in the field. In the indoor growth chambers, when high temperature starts early (before 11:00 am), IR64HT4 and IR64HT4EMF3 had higher spikelet fertility than IR64EMF3; when high temperature comes later (after 11:00 am), IR64EMF3 and IR64HT4EMF3 had higher spikelet fertility than IR64HT4. The flowering pattern of the IR64HT4EMF3 was earlier than IR64HT4, but similar to IR64EMF3 in the glasshouse, field and indoor growth chambers. IR64HT4EMF3 showed higher spikelet fertility than IR64EMF3 and IR64HT4 in the field in the Philippines. Thus, combination of early morning flowering and heat tolerance QTLs is an elegant breeding strategy to cope with future extreme climate. |
| format | Preprint |
| id | CGSpace164177 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | Research Square Platform LLC |
| publisherStr | Research Square Platform LLC |
| record_format | dspace |
| spelling | CGSpace1641772024-12-22T05:44:52Z Marker assisted pyramiding of QTLs for heat tolerance and escape upgrades heat resilience in rice (Oryza sativa L.) Ye, Changrong Ishimaru, Tsutomu Lambio, Leslie Li, Le Long, Yu He, Zhizhou Htun, Than Myint Tang, Shunxue Su, Zhenxi High temperature at flowering stage of rice causes low spikelet fertility and low yield. To cope with high temperature stress brought by climate change, two strategies were proposed to develop heat-resilient rice varieties. One is to escape the high temperature by flowering early in the morning, another is to enhance tolerance to high temperature stress per se. Two promising QTLs for early morning flowering (qEMF3) and heat tolerance (qHTSF4.1) were introgressed into IR64 background, and near isogenic lines (NILs) IR64+qEMF3 (IR64EMF3) and IR64+qHTSF4.1 (IR64HT4) were developed in previous studies. In this study, a QTL pyramiding line IR64+qHTSF4.1+qEMF3 (IR64HT4EMF3) was developed by marker assisted selection of the progenies of previous NILs. The NILs were subjected to different high temperature regimes in the indoor growth chambers and different locations in the field. In the indoor growth chambers, when high temperature starts early (before 11:00 am), IR64HT4 and IR64HT4EMF3 had higher spikelet fertility than IR64EMF3; when high temperature comes later (after 11:00 am), IR64EMF3 and IR64HT4EMF3 had higher spikelet fertility than IR64HT4. The flowering pattern of the IR64HT4EMF3 was earlier than IR64HT4, but similar to IR64EMF3 in the glasshouse, field and indoor growth chambers. IR64HT4EMF3 showed higher spikelet fertility than IR64EMF3 and IR64HT4 in the field in the Philippines. Thus, combination of early morning flowering and heat tolerance QTLs is an elegant breeding strategy to cope with future extreme climate. 2021-10-22 2024-12-19T12:53:35Z 2024-12-19T12:53:35Z Preprint https://hdl.handle.net/10568/164177 en Open Access Research Square Platform LLC Ye, Changrong; Ishimaru, Tsutomu; Lambio, Leslie; Li, Le; Long, Yu; He, Zhizhou; Htun, Than Myint; Tang, Shunxue and Su, Zhenxi. 2021. Marker assisted pyramiding of QTLs for heat tolerance and escape upgrades heat resilience in rice (Oryza sativa L.). Research Square, |
| spellingShingle | Ye, Changrong Ishimaru, Tsutomu Lambio, Leslie Li, Le Long, Yu He, Zhizhou Htun, Than Myint Tang, Shunxue Su, Zhenxi Marker assisted pyramiding of QTLs for heat tolerance and escape upgrades heat resilience in rice (Oryza sativa L.) |
| title | Marker assisted pyramiding of QTLs for heat tolerance and escape upgrades heat resilience in rice (Oryza sativa L.) |
| title_full | Marker assisted pyramiding of QTLs for heat tolerance and escape upgrades heat resilience in rice (Oryza sativa L.) |
| title_fullStr | Marker assisted pyramiding of QTLs for heat tolerance and escape upgrades heat resilience in rice (Oryza sativa L.) |
| title_full_unstemmed | Marker assisted pyramiding of QTLs for heat tolerance and escape upgrades heat resilience in rice (Oryza sativa L.) |
| title_short | Marker assisted pyramiding of QTLs for heat tolerance and escape upgrades heat resilience in rice (Oryza sativa L.) |
| title_sort | marker assisted pyramiding of qtls for heat tolerance and escape upgrades heat resilience in rice oryza sativa l |
| url | https://hdl.handle.net/10568/164177 |
| work_keys_str_mv | AT yechangrong markerassistedpyramidingofqtlsforheattoleranceandescapeupgradesheatresilienceinriceoryzasatival AT ishimarutsutomu markerassistedpyramidingofqtlsforheattoleranceandescapeupgradesheatresilienceinriceoryzasatival AT lambioleslie markerassistedpyramidingofqtlsforheattoleranceandescapeupgradesheatresilienceinriceoryzasatival AT lile markerassistedpyramidingofqtlsforheattoleranceandescapeupgradesheatresilienceinriceoryzasatival AT longyu markerassistedpyramidingofqtlsforheattoleranceandescapeupgradesheatresilienceinriceoryzasatival AT hezhizhou markerassistedpyramidingofqtlsforheattoleranceandescapeupgradesheatresilienceinriceoryzasatival AT htunthanmyint markerassistedpyramidingofqtlsforheattoleranceandescapeupgradesheatresilienceinriceoryzasatival AT tangshunxue markerassistedpyramidingofqtlsforheattoleranceandescapeupgradesheatresilienceinriceoryzasatival AT suzhenxi markerassistedpyramidingofqtlsforheattoleranceandescapeupgradesheatresilienceinriceoryzasatival |