Caracterización de variedades e híbridos de arroz bajo condiciones controladas para tolerancia a altas temperaturas y sequía

Environmental stress is one of the main limiting factors for the productivity of cereal crops worldwide. The growth of the rice plant is closely related to its environment and its adaptation to the variable conditions caused by the large number of environmental factors that cause abiotic stress. Wit...

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Autores:
Vargas Mendoza, Yani Sandrid
Tipo de recurso:
Trabajo de grado de pregrado
Fecha de publicación:
2022
Institución:
Universidad de Córdoba
Repositorio:
Repositorio Institucional Unicórdoba
Idioma:
spa
OAI Identifier:
oai:repositorio.unicordoba.edu.co:ucordoba/4825
Acceso en línea:
https://repositorio.unicordoba.edu.co/handle/ucordoba/4825
Palabra clave:
Tolerancia
Estrés abiótico
Rendimiento
Genotipo
Tolerance
Abiotic stress
Yield
Genotype
Rights
embargoedAccess
License
Copyright Universidad de Córdoba, 2022
Description
Summary:Environmental stress is one of the main limiting factors for the productivity of cereal crops worldwide. The growth of the rice plant is closely related to its environment and its adaptation to the variable conditions caused by the large number of environmental factors that cause abiotic stress. With the aim of characterizing rice varieties and hybrids under different conditions of abiotic stress under controlled conditions, experiments were carried out at the International Center for Tropical Agriculture during 2021, to evaluate the effect of drought, high night temperatures and low radiation on yield and its components. The results indicate that low radiation significantly reduced the percentage of fertility and the weight of 1000 grains, which means a reduction in yield among the genotypes evaluated; On the other hand, drought stress causes a reduction in yield, mainly in the hybrid HL23057. These results show that these abiotic stresses are limiting factors for crop productivity and that rice is sensitive to lack of irrigation and low radiation during the grain-filling phase. Therefore, understanding these stresses and identifying tolerant genotypes will help to achieve the goal of improving crops and thus minimizing the loss in rice crop yield, in the interests of preserving the food security of the world population.