Photoperiod-sensitivity genes shape floret development in wheat
Lengthening the pre-anthesis period of stem elongation (or late-reproductive phase, LRP) through altering photoperiod sensitivity has been suggested as a potential means to increase the number of fertile florets at anthesis (NFF) in wheat. However, little is known about the effects that the Ppd-1 ge...
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| Format: | Artículo |
| Language: | Inglés |
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2019
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| Online Access: | https://academic.oup.com/jxb/article/70/4/1339/5257095 http://hdl.handle.net/20.500.12123/4781 https://doi.org/10.1093/jxb/ery449 |
| _version_ | 1855483495762100224 |
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| author | Perez Gianmarco, Thomas Slafer, Gustavo A. Gonzalez, Fernanda Gabriela |
| author_browse | Gonzalez, Fernanda Gabriela Perez Gianmarco, Thomas Slafer, Gustavo A. |
| author_facet | Perez Gianmarco, Thomas Slafer, Gustavo A. Gonzalez, Fernanda Gabriela |
| author_sort | Perez Gianmarco, Thomas |
| collection | INTA Digital |
| description | Lengthening the pre-anthesis period of stem elongation (or late-reproductive phase, LRP) through altering photoperiod sensitivity has been suggested as a potential means to increase the number of fertile florets at anthesis (NFF) in wheat. However, little is known about the effects that the Ppd-1 genes modulating plant response to photoperiod may have on reproductive development. Here, five genotypes with either sensitive (b) or insensitive (a) alleles were grown in chambers under contrasting photoperiods (12 h or 16 h) to assess their effects. The genotypes consisted of the control cultivar Paragon (three Ppd-1b) and four near-isogenic lines of Paragon with Ppd-1a alleles introgressed from: Chinese Spring (Ppd-B1a), GS-100 (Ppd-A1a), Sonora 64 (Ppd-D1a), and Triple Insensitive (three Ppd-1a). Under a 12-h photoperiod, NFF in the genotypes followed the order three Ppd-1b > Ppd-B1a > Ppd-A1a > Ppd-D1a > three Ppd-1a. Under a 16-h photoperiod the differences were milder, but three Ppd-1b still had a greater NFF than the rest. As Ppd-1a alleles shortened the LRP, spikes were lighter and the NFF decreased. The results demonstrated for the first time that Ppd-1a decreases the maximum number of florets initiated through shortening the floret initiation phase, and this partially explained the variations in NFF. The most important impact of Ppd-1a alleles, however, was related to a reduction in survival of floret primordia, which resulted in the lower NFF. These findings reinforce the idea that an increased duration of the LRP, achieved through photoperiod sensitivity, would be useful for increasing wheat yield potential. |
| format | Artículo |
| id | INTA4781 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| record_format | dspace |
| spelling | INTA47812019-03-29T14:13:44Z Photoperiod-sensitivity genes shape floret development in wheat Perez Gianmarco, Thomas Slafer, Gustavo A. Gonzalez, Fernanda Gabriela Trigo Genes Fisiología Vegetal Fotoperiodismo Floración Wheat Plant Physiology Photoperiod Flowering Lengthening the pre-anthesis period of stem elongation (or late-reproductive phase, LRP) through altering photoperiod sensitivity has been suggested as a potential means to increase the number of fertile florets at anthesis (NFF) in wheat. However, little is known about the effects that the Ppd-1 genes modulating plant response to photoperiod may have on reproductive development. Here, five genotypes with either sensitive (b) or insensitive (a) alleles were grown in chambers under contrasting photoperiods (12 h or 16 h) to assess their effects. The genotypes consisted of the control cultivar Paragon (three Ppd-1b) and four near-isogenic lines of Paragon with Ppd-1a alleles introgressed from: Chinese Spring (Ppd-B1a), GS-100 (Ppd-A1a), Sonora 64 (Ppd-D1a), and Triple Insensitive (three Ppd-1a). Under a 12-h photoperiod, NFF in the genotypes followed the order three Ppd-1b > Ppd-B1a > Ppd-A1a > Ppd-D1a > three Ppd-1a. Under a 16-h photoperiod the differences were milder, but three Ppd-1b still had a greater NFF than the rest. As Ppd-1a alleles shortened the LRP, spikes were lighter and the NFF decreased. The results demonstrated for the first time that Ppd-1a decreases the maximum number of florets initiated through shortening the floret initiation phase, and this partially explained the variations in NFF. The most important impact of Ppd-1a alleles, however, was related to a reduction in survival of floret primordia, which resulted in the lower NFF. These findings reinforce the idea that an increased duration of the LRP, achieved through photoperiod sensitivity, would be useful for increasing wheat yield potential. EEA Pergamino Fil: Pérez Gianmarco, Thomas. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino. Ecofisiología; Argentina. University of Lleida. Department of Crop and Forest Sciences, and AGROTECNIO (Center for Research in Agrotechnology); España. CONICET-UNNOBA. CITNOBA; Argentina Fil: Slafer, Gustavo A. University of Lleida. Department of Crop and Forest Sciences, and AGROTECNIO (Center for Research in Agrotechnology); España. Institució Catalana de Recerca i Estudis Avançats (ICREA); España Fil: González, Fernanda G. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino. Departamento Ecofisiología; Argentina. CONICET-UNNOBA. CITNOBA; Argentina 2019-03-29T14:08:49Z 2019-03-29T14:08:49Z 2019-02 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://academic.oup.com/jxb/article/70/4/1339/5257095 http://hdl.handle.net/20.500.12123/4781 0022-0957 1460-2431 (digital) https://doi.org/10.1093/jxb/ery449 eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Journal of Experimental Botany 70 (4) : 1339-1348 ( February 2019) |
| spellingShingle | Trigo Genes Fisiología Vegetal Fotoperiodismo Floración Wheat Plant Physiology Photoperiod Flowering Perez Gianmarco, Thomas Slafer, Gustavo A. Gonzalez, Fernanda Gabriela Photoperiod-sensitivity genes shape floret development in wheat |
| title | Photoperiod-sensitivity genes shape floret development in wheat |
| title_full | Photoperiod-sensitivity genes shape floret development in wheat |
| title_fullStr | Photoperiod-sensitivity genes shape floret development in wheat |
| title_full_unstemmed | Photoperiod-sensitivity genes shape floret development in wheat |
| title_short | Photoperiod-sensitivity genes shape floret development in wheat |
| title_sort | photoperiod sensitivity genes shape floret development in wheat |
| topic | Trigo Genes Fisiología Vegetal Fotoperiodismo Floración Wheat Plant Physiology Photoperiod Flowering |
| url | https://academic.oup.com/jxb/article/70/4/1339/5257095 http://hdl.handle.net/20.500.12123/4781 https://doi.org/10.1093/jxb/ery449 |
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