Dissertation/ Thesis
Root traits and stable isotopes as phenotyping approaches to enhance wheat adaptation to Mediterranean conditions
| العنوان: | Root traits and stable isotopes as phenotyping approaches to enhance wheat adaptation to Mediterranean conditions |
|---|---|
| المؤلفون: | Rezzouk, Fatima Zahra |
| المساهمون: | Araus Ortega, José Luis, Serret Molins, M. Dolors, Universitat de Barcelona. Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals |
| المصدر: | Tesis Doctorals - Departament - Biologia Evolutiva, Ecologia i Ciències Ambientals |
| سنة النشر: | 2023 |
| المجموعة: | Dipòsit Digital de la Universitat de Barcelona |
| مصطلحات موضوعية: | Blat, Clima mediterrani, Arrels (Botànica), Fenotip, Teledetecció, Isòtops estables en ecologia, Wheat, Mediterranean climate, Roots (Botany), Phenotype, Remote sensing, Stable isotopes in ecological research |
| الوصف: | [eng] Wheat is a major staple food worldwide. Its cultural and economic importance is mainly highlighted in the Mediterranean region, among other regions of the world. However, wheat production is frequently challenged by environmental factors such as interannual variability in precipitation and temperatures, which translates in further shortage in water and nutrients availability. These environmental events are expected to worsen even more in the near future. Therefore, tailoring wheat cultivars that are simultaneously climate-resilient and high yielding under Mediterranean growing conditions is becoming a main focus of breeders and researchers. To this end, the main objective of the present dissertation was to identify ideotypic characteristics of wheat cultivars grown under different Mediterranean conditions through the implementation of diverse phenotyping approaches, targeting the aboveground biomass using remote and proximate sensing techniques, and the belowground biomass using shovelomics and soil coring techniques. These phenotypical platforms were further combined with stable isotopes as physiological traits assessing water and nitrogen status in different plant tissues and soil profile, as well as crop growth traits, mainly phenology, biomass and plant height, and yield components to assess potential traits to breed for in the selected idiotypic traits. Overall, phenology had a clear role in drought adaptation under the Mediterranean conditions, under wet seasons phenological durations were longer in high yielding genotypes, whereas under dry seasons, shorter days to anthesis followed by longer grain filing period were the characteristics shown by high yielding genotypes. Furthermore, predictive models integrated water status indicators (carbon isotope composition (dti3C) and canopy temperature depression (CTD)) as main explicative variables to grain yield, followed by root traits and nitrogen status. The best yielding genotypes were associated with shorter days to heading, better water status mainly ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| وصف الملف: | 300 p.; application/pdf |
| اللغة: | English |
| Relation: | http://hdl.handle.net/2445/202861; http://hdl.handle.net/10803/689135 |
| الاتاحة: | http://hdl.handle.net/2445/202861 http://hdl.handle.net/10803/689135 |
| Rights: | cc by (c) Rezzouk, Fatima Zahra, 2023 ; http://creativecommons.org/licenses/by/3.0/es/ ; info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.FD80A84A |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |