Stability of upland rice lines in Minas Gerais, Brazil

Abstract

Prior to release, new cultivars should be tested for region-specific yield stability, which is rarely done. This study aimed to evaluate the grain yield stability of 20 lines and cultivars tested in trials of value for cultivation and use in Minas Gerais State, in 10 environments in 2004/2005 and 13 other lines used in the two growing seasons (2003/2004 and 2004/2005), which were evaluated in 18 environments. The methodologies of Lin and Binns (1988) and Annicchiarico (1992) were used. Both methodologies identified the most stable lines in 2004/2005, in decreasing order: MG1097, Curinga-3, MG1096, and MG1094. The cultivars MG1096, MG1089, BRSMG Conai, CNAs10227, and MG1094performed best in the two growing seasons. It was concluded that the two methodologies are highly consistent.