Genotype-environment interaction in sugarcane by AMMI and site regression models in Venezuela [Interacción genotipo-ambiente en caña de azúcar mediante los modelos AMMI y regresión de sitios en Venezuela]
Rea R.,Fundacion Institute Estudios Avanzados |
De Sousa-Vieira O.,INIA Yaracuy |
Diaz A.,INIA Yaracuy |
Ramon M.,INIA Portuguesa |
And 3 more authors.
Revista de la Facultad de Agronomia | Year: 2014
In Venezuela, sugarcane (Saccharum spp. Híbrido) is grown under different conditions of soil fertility and moisture levels. The genotype x environment interaction (GEI) is a universally recognized phenomenon that occurs when evaluating genotypes in different environments. The aim of this study was to evaluate the variability in cane yield (TCH) and determine the response patterns between genotypes and environments using AMMI and the Sites Regression Analysis model (SREG). We used data from twenty sugarcane genotypes evaluated at seven locations during three years. Cane yield (TCH) was significantly affected by environmental and genotypic effects, which explain, respectively, 41.16 and 40.67% of the total sum of squares. The GEI expressed the 17.90% of the variation. To AMMI1, the highest-yielding and stable cultivars were V98-62, V98-120, V99- 236, and V00-50. The graph SREG GGE (G+GE) biplot model classified the environments in two macro-environments. The macro-1 contains locations Ivonne, Castillera, Las Majaguas, Montaña verde, and FUNDACAÑA where the genotypes more adapted and with better cane yield were V98-62, V98-120, V99-236, V00-50, V99-213, and C323-68. The macro-2 was composed by the locations of Santa Lucia and Quebrada arriba where the genotypes with better performance and adaptation were V99-190, V99-208, and V99-203. © 2014 Universidad del Zulia. All rights reserved.