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Identification of water deficit tolerant sweet potato genotypes: open field screening

Grant number: 23/01678-2
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): April 01, 2023
Effective date (End): October 31, 2023
Field of knowledge:Agronomical Sciences - Agronomy
Principal Investigator:Edgard Henrique Costa Silva
Grantee:Sandro Vinícius dos Santos
Host Institution: Faculdade de Ciências Agrárias. Universidade do Oeste Paulista (UNOESTE). Campus de Presidente Prudente. Presidente Prudente , SP, Brazil
Associated research grant:22/03120-6 - Development of drought-tolerant sweet potato genotypes, AP.PNGP.PI


Sweet potato is socioeconomically relevant in Western São Paulo, a region characterized by the predominance of conditions that increase the water deficit, such as sandy soils, high temperatures, and the occurrence of Indian summer. Stress due to water deficiency is a factor that reduces yield and quality of sweet potato tuberous roots. As part of a breeding program aimed at drought tolerance, the objective is to identify sweet potato genotypes tolerant to water deficit through the evaluation of physiological aspects and parameters of yield and root quality. An experiment will be conducted in strips design to study the behavior of sweet potato genotypes in two water regimes (40 and 100% of field capacity). Characteristics of vegetative development, physiological aspects, yield, and quality of tuberous roots will be evaluated. The genotypes will be classified as neutral, sensitive, or tolerant to water deficit. The results of this study will support the next stages of the breeding program through the selection of genotypes for polycrosses.

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