Adaptabilidade e estabilidade de genótipos de girassol no Brasil Central

Abstract

Adaptability and stability of sunflower genotypes in Central BrazilAbstract -The objective of this study was to evaluate the adaptability and stability of sunflower genotype grain and oil yield, in Central Brazil. The analyzed data were obtained from sunflower genotype trials coordinated by Embrapa Soja, from 2004 to 2007. Genotype adaptability and stability were evaluated using the methods of Eberhart & Russell, Porto et al., Rocha et al., and Annicchiarico. The Annicchiarico method divides sites into favorable and unfavorable environments. This method and the one of Porto et al. were similar and more adequate to evaluate genotypic adaptability. For grain yield, the varieties BRSGira 02 and Nutrissol were widely adapted. The hybrids Agrobel 959, MG50 and V03005 and the varieties Catissol and Multissol were adapted to favorable environments and the hybrids BRHS 02 and BRHS 04 were adapted to unfavorable environments. For oil yield, the hybrids Agrobel 959, V03005, MG50, VDH 487, EXP 1441, EXP 1447, and EXP 1446 and the varieties BRSGira 01, BRSGira 02, and Nutrissol were widely adapted. The hybrid MG52 and the varieties Catissol and Multissol were adapted to favorable environments and BRHS 04 and BRHS 02 were adapted to unfavorable environments. The selected genotypes were shown to be stable, but at different levels.

Desempenho agronômico de cultivares de café resistentes à ferrugem no estado de Minas Gerais, Brasil

“…Assim, é considerada ideal a cultivar que tiver o menor risco de ser adotada, pois possui o maior índice de confiança (Correa et al, 2006). Autores como Grunvald et al (2008) e Condé et al (2010 recomendam a utilização deste método pela facilidade da interpretação.…”

Comparing Biplot Multivariate Analyses with Eberhart and Russell’ method for genotype x environment interaction

“…On the other hand, different genotypes have different performance in each region that can be capitalized to maximize productivity (Souza et al 2008). Eberhart and Russell (1966) developed a methodology for identifying cultivars with greater adaptability and stability that has been widely used in the identification of genotypes for this purpose (Miranda et al 1998, Grunvald et al 2008). However, other methods for identifying cultivars with adaptability and stability have been developed and many multivariate techniques are available such as GGE (Genotype main effects and Genotype x Environment interaction) and AMMI (Additive Main effects and Multiplicative Interaction) with new information for cultivars, environmental stratification and cultivar x environment interaction ).…”

Adaptabilidade e estabilidade fenotípica de progênies F4 de coffea arábica L.

“…Assim, é considerada ideal a cultivar que apresentar o menor risco aoser adotada, isto é, aquela que apresentar o maior índice de confiança (CORRêA; MENDES; BARTHOLO, 2006). Autores como Condé et al (2010) e Grunvald et al (2008) recomendam a utilização desta metodologia pela facilidade de interpretação.…”