Using UAV Borne, Multi-Spectral Imaging for the Field Phenotyping of Shoot Biomass, Leaf Area Index and Height of West African Sorghum Varieties under Two Contrasted Water Conditions
| Autor: | Boubacar Gano, Delphine Luquet, Alain Audebert, Joseph Sékou B. Dembele, Grégory Beurier, Adama P. Ndour, Diaga Diouf |
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| Přispěvatelé: | Institut Sénégalais de Recherches Agricoles [Dakar] (ISRA), Université Cheikh Anta Diop [Dakar, Sénégal] (UCAD), Amélioration génétique et adaptation des plantes méditerranéennes et tropicales (UMR AGAP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Département Systèmes Biologiques (Cirad-BIOS), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Deutscher Akademischer Austausch Dienst (DAAD), sgt terra gates project - Bill and Melinda Gates foundation |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Tolérance à la sécheresse 010504 meteorology & atmospheric sciences UAV platform Phénotype unmanned aerial vehicles [EN] drought tolerance Facteur climatique RGB cameras 01 natural sciences Imagerie multispectrale Mathematics 2. Zero hunger Biomass (ecology) education.field_of_study biology Indice de surface foliaire food and beverages Agriculture Vegetation vegetation indices multi-spectral phenotyping F60 - Physiologie et biochimie végétale Drought tolerance Population Context (language use) Normalized Difference Vegetation Index West Africa [SDV.BV]Life Sciences [q-bio]/Vegetal Biology Leaf area index education 0105 earth and related environmental sciences 15. Life on land Sorghum biology.organism_classification Agronomy sorghum U30 - Méthodes de recherche Agronomy and Crop Science 010606 plant biology & botany Index de végétation |
| Zdroj: | Agronomy Agronomy, MDPI, 2021, 11 (5), ⟨10.3390/agronomy11050850⟩ Agronomy, Vol 11, Iss 850, p 850 (2021) Volume 11 Issue 5 Agronomy (Basel) |
| ISSN: | 2073-4395 |
| DOI: | 10.3390/agronomy11050850⟩ |
| Popis: | Meeting food demand for the growing population will require an increase to crop production despite climate changes and, more particularly, severe drought episodes. Sorghum is one of the cereals most adapted to drought that feed millions of people around the world. Valorizing its genetic diversity for crop improvement can benefit from extensive phenotyping. The current methods to evaluate plant biomass, leaves area and plants height involve destructive sampling and are not practical in breeding. Phenotyping relying on drone based imagery is a powerful approach in this context. The objective of this study was to develop and validate a high throughput field phenotyping method of sorghum growth traits under contrasted water conditions relying on drone based imagery. Experiments were conducted in Bambey (Senegal) in 2018 and 2019, to test the ability of multi-spectral sensing technologies on-board a UAV platform to calculate various vegetation indices to estimate plants characteristics. In total, ten (10) contrasted varieties of West African sorghum collection were selected and arranged in a randomized complete block design with three (3) replicates and two (2) water treatments (well-watered and drought stress). This study focused on plant biomass, leaf area index (LAI) and the plant height that were measured weekly from emergence to maturity. Drone flights were performed just before each destructive sampling and images were taken by multi-spectral and visible cameras. UAV-derived vegetation indices exhibited their capacity of estimating LAI and biomass in the 2018 calibration data set, in particular: normalized difference vegetative index (NDVI), corrected transformed vegetation index (CTVI), seconded modified soil-adjusted vegetation index (MSAVI2), green normalize difference vegetation index (GNDVI), and simple ratio (SR) (r2 of 0.8 and 0.6 for LAI and biomass, respectively). Developed models were validated with 2019 data, showing a good performance (r2 of 0.92 and 0.91 for LAI and biomass accordingly). Results were also promising regarding plant height estimation (RMSE = 9.88 cm). Regression plots between the image-based estimation and the measured plant height showed a r2 of 0.83. The validation results were similar between water treatments. This study is the first successful application of drone based imagery for phenotyping sorghum growth and development in a West African context characterized by severe drought occurrence. The developed approach could be used as a decision support tool for breeding programs and as a tool to increase the throughput of sorghum genetic diversity characterization for adaptive traits. |
| Databáze: | OpenAIRE |
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