Author(s)

Edimar Rodrigues Soares^1*, Robertt Fernandes², Laercio da Silva Londero³, Diego Lopes dos Santos³, Samara Cristina Sampaio Corrêa³, Everton Augusto Sampaio Corrêa³, Remy Carvalho dos Santos³, Ariel Pereira Gomes⁴, Leandro Galon⁵, Fabiana Ferreira Pires⁴, Rosilene da Silva Gonçalves³

¹Department of Soil Science, São Paulo State University (UNESP), Jaboticabal, Brazil.
²Department of Agronomy, Federal Institute of Education Science and Technology of Rondônia (IFRO), Colorado do Oeste, Brazil.
³Department of Agronomy, College Amazon (FAMA), Vilhena, Brazil.
⁴Agronomist, Federal University Mato Grosso (UFMT), Cuiabá, Brazil.
⁵Department Herbology, Federal University of the Southern Border South (UFFS), Erechim, Brazil.

The upland rice is grown in most Brazilian states. However, in many of them the yield obtained is low. The choice of cultivar more suited to a particular environment can contribute to increased productivity of this crop. This research aimed to evaluate the performance of a hybrid cultivar of upland rice (Ecco) and five conventional cultivars (BRS Monarca, BRS Primavera, AN Cambará, BRS Sertaneja and BRS MG Curinga) in two environments (Vilhena and Cerejeiras). The tests were conducted in the agricultural year 2010/2011. We evaluated the following characteristics: tillering, panicle number per unit area, number of filled grains per panicle sterile, mass of grains per panicle, 1000 grain weight, grain yield (kg·ha^-1) and whole grain yield. There was no cultivar x environment interaction for all traits. Greater tillering, higher panicle number per area, higher productivity and yield of whole grains in the municipality of Cerejeiras were observed, while the highest number of sterile grains per panicle was obtained in Vilhena. The hybrid Ecco highlighted in relation to all other cultivars is in relation to tillering, panicle number per area and grain yield. The municipality of Cerejeiras is the most suitable for the cultivation of upland rice.

Oryza sativa L., Hybrid, Upland Rice, Genotype x Environment

Soares, E. , Fernandes, R. , Londero, L. , dos Santos, D. , Sampaio Corrêa, S. , Sampaio Corrêa, E. , dos Santos, R. , Gomes, A. , Galon, L. , Pires, F. and Gonçalves, R. (2014) Agronomic Performance of Cultivars of Upland Rice in the Southern of the Region of Rondônia, Brazil. Agricultural Sciences, 5, 513-518. doi: 10.4236/as.2014.56053.