Planting geometry as a pre-screening technique for identifying CO2 responsive rice genotypes: a case study of panicle number
Identifying CO2 responsive genotypes is a major target for enhancing crop productivity under future global elevated atmospheric CO2 concentration ([CO2]). However, [CO2]‐fumigation facilities are extremely expensive and are not easily accessible, and are limited in space for large‐scale screening. H...
| Autores principales: | , , , , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Wiley
2014
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| Acceso en línea: | https://hdl.handle.net/10568/165523 |
| _version_ | 1855515260487729152 |
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| author | Shimono, Hiroyuki Ozaki, Youhei Jagadish, Krishna S.V. Sakai, Hidemitsu Usui, Yasuhiro Hasegawa, Toshihiro Kumagai, Etsushi Nakano, Hiroshi Yoshinaga, Satoshi |
| author_browse | Hasegawa, Toshihiro Jagadish, Krishna S.V. Kumagai, Etsushi Nakano, Hiroshi Ozaki, Youhei Sakai, Hidemitsu Shimono, Hiroyuki Usui, Yasuhiro Yoshinaga, Satoshi |
| author_facet | Shimono, Hiroyuki Ozaki, Youhei Jagadish, Krishna S.V. Sakai, Hidemitsu Usui, Yasuhiro Hasegawa, Toshihiro Kumagai, Etsushi Nakano, Hiroshi Yoshinaga, Satoshi |
| author_sort | Shimono, Hiroyuki |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Identifying CO2 responsive genotypes is a major target for enhancing crop productivity under future global elevated atmospheric CO2 concentration ([CO2]). However, [CO2]‐fumigation facilities are extremely expensive and are not easily accessible, and are limited in space for large‐scale screening. Hence, reliable donors for initiating [CO2]‐responsive breeding programs are not in place for crops, including rice. We propose a simple and novel phenotyping method for identifying [CO2]‐responsive genotypes, and quantify the responsiveness to low planting density over 4‐year trials across both temperate and tropical conditions. Panicle number per plant is the key determinant of grain yield and hence was the focus trait across all our trials. In temperate climate, a 3‐season field screening using 127 diverse rice genotypes and employing two planting densities (normal and low density) was conducted. Two japonica genotypes were selected based on their higher responsiveness to low planting density as candidates for validating the proposed phenotyping protocol as a pre‐screen for [CO2]‐responsiveness. The approach using the two selected candidates and three standard genotypes was confirmed using a free‐air CO2 enrichment facility and temperature gradient chambers under elevated [CO2]. In tropical climate, we grew three rice cultivars, previously identified for their [CO2]‐responsiveness, at two planting densities. The experiments provided confirmation that responsiveness to low planting density was correlated with that of [CO2]‐responsiveness across both the temperate and tropical conditions. The planting density would be useful pre‐screening method for testing large panels of diverse germplasm at low cost complemented by available CO2‐control facilities for final validation of candidates from the pre‐screens. |
| format | Journal Article |
| id | CGSpace165523 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | CGSpace1655232025-05-14T10:23:52Z Planting geometry as a pre-screening technique for identifying CO2 responsive rice genotypes: a case study of panicle number Shimono, Hiroyuki Ozaki, Youhei Jagadish, Krishna S.V. Sakai, Hidemitsu Usui, Yasuhiro Hasegawa, Toshihiro Kumagai, Etsushi Nakano, Hiroshi Yoshinaga, Satoshi Identifying CO2 responsive genotypes is a major target for enhancing crop productivity under future global elevated atmospheric CO2 concentration ([CO2]). However, [CO2]‐fumigation facilities are extremely expensive and are not easily accessible, and are limited in space for large‐scale screening. Hence, reliable donors for initiating [CO2]‐responsive breeding programs are not in place for crops, including rice. We propose a simple and novel phenotyping method for identifying [CO2]‐responsive genotypes, and quantify the responsiveness to low planting density over 4‐year trials across both temperate and tropical conditions. Panicle number per plant is the key determinant of grain yield and hence was the focus trait across all our trials. In temperate climate, a 3‐season field screening using 127 diverse rice genotypes and employing two planting densities (normal and low density) was conducted. Two japonica genotypes were selected based on their higher responsiveness to low planting density as candidates for validating the proposed phenotyping protocol as a pre‐screen for [CO2]‐responsiveness. The approach using the two selected candidates and three standard genotypes was confirmed using a free‐air CO2 enrichment facility and temperature gradient chambers under elevated [CO2]. In tropical climate, we grew three rice cultivars, previously identified for their [CO2]‐responsiveness, at two planting densities. The experiments provided confirmation that responsiveness to low planting density was correlated with that of [CO2]‐responsiveness across both the temperate and tropical conditions. The planting density would be useful pre‐screening method for testing large panels of diverse germplasm at low cost complemented by available CO2‐control facilities for final validation of candidates from the pre‐screens. 2014-11 2024-12-19T12:55:09Z 2024-12-19T12:55:09Z Journal Article https://hdl.handle.net/10568/165523 en Wiley Shimono, Hiroyuki; Ozaki, Youhei; Jagadish, Krishna S. V.; Sakai, Hidemitsu; Usui, Yasuhiro; Hasegawa, Toshihiro; Kumagai, Etsushi; Nakano, Hiroshi and Yoshinaga, Satoshi. 2014. Planting geometry as a pre-screening technique for identifying CO2 responsive rice genotypes: a case study of panicle number. Physiologia Plantarum, Volume 152 no. 3 p. 520-528 |
| spellingShingle | Shimono, Hiroyuki Ozaki, Youhei Jagadish, Krishna S.V. Sakai, Hidemitsu Usui, Yasuhiro Hasegawa, Toshihiro Kumagai, Etsushi Nakano, Hiroshi Yoshinaga, Satoshi Planting geometry as a pre-screening technique for identifying CO2 responsive rice genotypes: a case study of panicle number |
| title | Planting geometry as a pre-screening technique for identifying CO2 responsive rice genotypes: a case study of panicle number |
| title_full | Planting geometry as a pre-screening technique for identifying CO2 responsive rice genotypes: a case study of panicle number |
| title_fullStr | Planting geometry as a pre-screening technique for identifying CO2 responsive rice genotypes: a case study of panicle number |
| title_full_unstemmed | Planting geometry as a pre-screening technique for identifying CO2 responsive rice genotypes: a case study of panicle number |
| title_short | Planting geometry as a pre-screening technique for identifying CO2 responsive rice genotypes: a case study of panicle number |
| title_sort | planting geometry as a pre screening technique for identifying co2 responsive rice genotypes a case study of panicle number |
| url | https://hdl.handle.net/10568/165523 |
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