Araméndiz Tatis, HermesVargas Mendoza, Yani Sandrid2022-02-282026-02-272022-02-282022-02-27https://repositorio.unicordoba.edu.co/handle/ucordoba/4825Environmental 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.1. ALIANZA DE BIOVERSITY INTERNATIONAL Y EL CENTRO INTERNACIONAL DE AGRICULTURA TROPICAL (CIAT) ................................. 191.1 MISIÓN ..................................................................................................... 201.2 VISIÓN ...................................................................................................... 202. OBJETIVOS ................................................................................................... 212.1 OBJETIVO GENERAL .............................................................................. 212.2 OBJETIVOS ESPECIFICOS ..................................................................... 213. MARCO TEÓRICO ......................................................................................... 223.1 IMPORTANCIA ECONOMICA .................................................................. 223.2 DIVERSIDAD GENÉTICA DEL ARROZ ................................................... 223.3 CRECIMIENTO Y DESARROLLO DE LA PLANTA DE ARROZ .............. 233.3.1 Fase vegetativa...................................................................................... 233.3.2 Fase reproductiva. ................................................................................. 243.3.3 Fase de madurez. .................................................................................. 253.4 RENDIMIENTO Y SUS COMPONENTES EN EL CULTIVO DE ARROZ . 263.4.1 Número de panículas por metro cuadrado ............................................. 273.4.2 Número de espiguilla por panícula......................................................... 283.4.3 Porcentaje de fertilidad. ......................................................................... 283.4.4 Peso de 1000 gramos. ........................................................................... 293.5 ESTRÉS ABIOTICO ................................................................................. 293.5.1 Estrés por sequía. .................................................................................. 303.5.2 Estrés por altas temperaturas ................................................................ 303.5.3 Estrés por baja radiación ....................................................................... 313.6 HÍBRIDOS DE ARROZ ............................................................................. 314. ACTIVIDADES DESARROLLADAS .............................................................. 334.1 EVALUACIÓN DE COMPONENTES DEL RENDIMIENTO EN TRES GENOTIPOS DE ARROZ ................................................................................... 334.1.1 Sitio experimental y material genético. .................................................. 334.1.2 Muestreos y mediciones ........................................................................ 334.1.3 Análisis estadístico. ............................................................................... 384.1.4 Resultados y análisis. ............................................................................ 384.2 EVALUACIÓN PARA LA TOLERANCIA A ALTAS TEMPERATURAS NOCTURNAS EN EL INVERNADERO HIGH TUNNEL MOVIL ......................... 424.2.1 Sitio experimental y material genético. .................................................. 424.2.2 Diseño experimental y manejo agronómico ........................................... 424.2.4 Tratamiento de estrés. ........................................................................... 454.2.5 Cosecha. ................................................................................................ 474.3 EVALUACIÓN PARA LA TOLERANCIA A SEQUÍA EN EL RAINOUT SHELTER ........................................................................................................... 484.3.1 Sitio experimental y material genético ................................................... 484.3.2 Diseño experimental y manejo agronómico. .......................................... 484.3.3 Muestreos y mediciones ........................................................................ 534.3.4 Tratamiento de estrés ............................................................................ 554.3.5 Cosecha de panículas y selección de plantas ....................................... 564.3.6 Resultados y discusión. ......................................................................... 575. CONCLUSIONES ........................................................................................... 606. RECOMENDACIONES ................................................................................... 617. REFERENCIAS BIBLIOGRAFICAS .............................................................. 62application/pdfspaCopyright Universidad de Córdoba, 2022Trabajo de grado - Pregradoinfo:eu-repo/semantics/embargoedAccessAtribución-NoComercial-SinDerivadas 4.0 Internacional (CC BY-NC-ND 4.0)ToleranciaEstrés abióticoRendimientoGenotipoToleranceAbiotic stressYieldGenotype