Indicação de cultivares de feijoeiro-comum baseada na avaliação conjunta de diferentes épocas de semeadura

Abstract

Resumo -Os objetivos deste trabalho foram verificar a existência de interação entre genótipos de feijoeiro-comum e épocas de semeadura, avaliar a importância da interação complexa e verificar a necessidade de indicação de cultivares para cada época, em região de altitude intermediária nos estados do Paraná e Santa Catarina. Utilizaram-se avaliações de produtividade de grãos de 16 genótipos, em 12 ensaios realizados em duas épocas de semeadura. As análises de variância foram realizadas com decomposição da interação genótipos x ambientes. A percentagem complexa da interação para os pares de ambientes e também a correlação de Spearman entre épocas foram estimadas por meio de médias de produtividade e parâmetros de estabilidade dos genótipos, obtidos pela metodologia Annicchiarico. Detectaram-se diferenças entre épocas e presença de interação genótipos x épocas, mas com menor importância que as outras interações duplas com genótipos. As correlações de Spearman entre épocas mostraram interação predominantemente simples entre genótipos e épocas. A média da percentagem complexa da interação entre pares de ensaios mostrou que a alteração de classificação dos genótipos dentro de cada época tem a mesma magnitude do que a alteração entre épocas. Não é necessário indicar cultivares de feijoeiro comum para cada época isoladamente na região de estudo.Termos para indexação: Phaseolus vulgaris, interação complexa, interação genótipo x ambiente. Indication of common bean cultivars based in joint evaluation of different growing seasonsAbstract -The objectives of this work were to verify the genotype x growing seasons interaction in common beans, to evaluate the importance of the complex interaction and to verify the need to indicate cultivars for each growing season, in a region of intermediate altitude of Paraná and Santa Catarina states, Brazil. Grain yield data of 16 genotypes in 12 trials carried out in two growing seasons were used. Variance analysis was performed with the decomposition of genotype x environments interaction. The percentage of complex interaction was estimated between pairs of environments and also by the Spearman correlations between the growing seasons, using genotype's grain yield means and stability parameters obtained from Annicchiarico's methodology. Differences among growing seasons and genotype x growing season's interaction were detected; however, with lower importance than others double interactions with genotypes. The Spearman correlations between growing seasons showed that genotype x growing season's interaction is predominantly simple. The complex percentage mean of genotypes x growing season's interaction between pairs of environments showed that the alteration of classification is the same between pairs of a same growing season or between pairs of different growing seasons. It is not necessary to indicate common beans cultivars to each growing season, in the studied region.

Complex interaction between genotypes and growing seasons of carioca common bean in Goiás/Distrito Federal

“…On the other hand, the results of Pereira et al (2010) differed from those of this study and of Ramalho et al (1998), in that the G x L interaction was most important (5 %), followed by the G x Y (3 %) and G x S interaction (1.5 %). However, it is important to remember that this study was conducted in Parana and Santa Catarina, in the rainy and dry growing seasons, and that in these states the difference between growing seasons is much smaller, especially in relation to temperature and water supply during the growing period.…”

“…However, the interaction involving the most important source of genotype variation was G x LY (7.2 %), which was approximately four times higher than G x S, indicating that genotype assessments in multiple locations/ years are more important than evaluations in the two growing seasons (Table 2). In a study on the rainy and dry growing seasons in the states of Parana and Santa Catarina, Pereira et al (2010) found a little relevant G x S interaction, accounting for only 0.9 % of the total variation, while LY x G interaction was responsible for 5.9 %.…”

“…Matos et al (2007) however reported that the G x L interaction was very important in this state. The results of Pereira et al (2010), who studied these same factors in the states of Paraná and Santa Catarina, were different in that the G x S interaction was the least important, followed by the interactions of G x Y and G x L.…”

Genetic potential of common bean progenies obtained by different breeding methods evaluated in various environments

“…The effect of the GE interaction on common bean grain yield is pronounced and has been previously described (Carbonell et al, 2004;Melo et al, 2007;Pereira et al, 2009Pereira et al, , 2010Pereira et al, , 2012Torga et al, 2013). Therefore, it is important to perform tests in representative cultivation environments in order to determine the effect of the GE interaction on estimates of genetic parameters, both in the process of breeding segregating populations and when selecting superior lines.…”

Genetic potential of common bean progenies selected for crude fiber content obtained through different breeding methods

“…Genotype by environment interaction has been frequently reported in common beans in association with the trait of grain yield (Ramalho et al, 1998;Carbonell et al, 2004;Oliveira et al, 2006;Melo et al, 2007;Pereira et al, 2009Pereira et al, , 2010Torga et al, 2013), although it has been less explored for other traits, such as crude fiber content. There are some research results, such as those by Londero et al (2006) and Silva et al (2013) that provide evidence that fiber content in common beans is influenced by the environment.…”