Maize Open-Pollinated Populations Physiological Improvement: Validating Tools for Drought Response Participatory Selection
| Autor: | Daniela Santos, Pedro Mendes-Moreira, Emanuel Ferreira, J. Miguel Costa, Susana T. Leitao, Maria Carlota Vaz Patto, Duarte Pintado, Susana de Sousa Araújo, Catarina Bicho, Mara Lisa Alves |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Geography Planning and Development Population lcsh:TJ807-830 lcsh:Renewable energy sources Chl a fluorescence Management Monitoring Policy and Law Biology Zea mays 01 natural sciences Performance index Open pollination chl a fluorescence 03 medical and health sciences Altitude Genetic variability education ComputingMilieux_MISCELLANEOUS Selection (genetic algorithm) performance index lcsh:Environmental sciences 030304 developmental biology water deficit 2. Zero hunger lcsh:GE1-350 0303 health sciences education.field_of_study zea mays l Renewable Energy Sustainability and the Environment business.industry Drought resistance lcsh:Environmental effects of industries and plants field phenotyping 15. Life on land leaf gas exchange Biotechnology participatory plant breeding lcsh:TD194-195 ComputerSystemsOrganization_MISCELLANEOUS open-pollinated populations InformationSystems_MISCELLANEOUS Adaptation business 010606 plant biology & botany |
| Zdroj: | Sustainability, Vol 11, Iss 21, p 6081 (2019) Sustainability Volume 11 Issue 21 Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| ISSN: | 2071-1050 |
| Popis: | Participatory selection&mdash exploiting specific adaptation traits to target environments&mdash helps to guarantees yield stability in a changing climate, in particular under low-input or organic production. The purpose of the present study was to identify reliable, low-cost, fast and easy-to-use tools to complement traditional selection for an effective participatory improvement of maize populations for drought resistance/tolerance. The morphological and eco-physiological responses to progressive water deprivation of four maize open-pollinated populations were assessed in both controlled and field conditions. Thermography and Chl a fluorescence, validated by gas exchange indicated that the best performing populations under water-deficit conditions were &lsquo Fandango&rsquo and to a less extent &lsquo Pigarro&rsquo (both from participatory breeding). These populations showed high yield potential under optimal and reduced watering. Under moderate water stress, &lsquo Bilhó &rsquo originating from an altitude of 800 m, is one of the most resilient populations. The experiments under chamber conditions confirmed the existence of genetic variability within &lsquo and &lsquo for drought response relevant for future populations breeding. Based on the easiness to score and population discriminatory power, the performance index (PIABS) emerges as an integrative phenotyping tool to use as a refinement of the common participatory maize selection especially under moderate water deprivation. |
| Databáze: | OpenAIRE |
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