Biplot analysis: concepts, interpretations and uses/Analises Biplot: conceitos, interpretacoes e aplicacoes

The genotype environment interaction (GE) influences on the selection and recommendation of cultivars. Biplot analysis has been increasingly used in data analysis of complex traits in agriculture. However, the peculiarities of biplot graphic could induce the researcher to errors on interpretation. Thus, this review argues the applicability and graphic interpretation of models AMMI (Additive Main Effects and Multiplicative Interaction) and GGE biplot (genotype main effects + genotype environment interaction). Moreover, also aims to explain that it is not adequate to compare both statistical methods. It is discussed the best methodology considering the information required and the research objectives. Key words: AMMI, GGE Biplot, genotype environment interaction, adaptability andstability. A selecao e recomendacao de genotipos superiores sao dificultadas devido a ocorrencia da interacao genotipo e ambiente. Nesse contexto, as analises biplot tem sido cada vez mais utilizadas na analise de dados agronomicos, com interacoes de natureza complexa. Entretanto, as particularidades existentes no grafico biplot dificultam sua interpretacao, podendo induzir o pesquisador a erros. Assim, este artigo de revisao discute a aplicabilidade e a interpretacao grafica dos modelos AMMI (Additive Main effects and Multiplicative Interaction) e GGE biplot (genotype main effects + genotype environment interaction) destas analises no grafico biplot. Tambem, visa a desmistificar a necessidade de comparacao entre ambas as metodologias. Discute-se quanto a escolha da metodologia mais adequada, levando em consideracao a informacao requerida e os objetivos do pesquisador. Palavras-chave: AMMI, GGE Biplot, interacao genotipo e ambiente, adaptabilidade e estabilidade.