Desempenho de genótipos de arroz irrigado na fronteira oeste do Rio Grande do Sul

Abstract

The state of Rio Grande do Sul is responsible for most of national rice production, and the use of cultivars with high genetic potential has contributed to the increase in grain yield. Seeking to improve these indices the breeding programs are aimed at developing rice cultivars with greater adaptability and stability and productivity. The work objective was to evaluate the performance of six genotypes of rice in relation to productivity and quality of grain in three harvests. six genotypes of rice were used, with four hybrids: Avaxi CL, CL Inov, XP CL 111 and CL XP102 and two conventional cultivars PUITA Inta CL and Guri Inta CL in harvests 13/14, 14/15 and 15/16 in Itaqui/RS. There was interaction between genotypes and harvests, showing differentiated behavior of the genotypes in the appraised crops. The crop and genotypes effects demonstrated superiority of harvests 13/14 and 14/15, and hybrids with improved yield performance, respectively. The methodology of Lins and Bins showed the XP 111 Cl and XP 102 CL hybrid as adapted and stable for the variables yield and whole, respectively.