Adaptabilidade e estabilidade de linhagens de trigo no Estado de São Paulo

Abstract

RESUMOEstimaram-se parâmetros de adaptabilidade e estabilidade, por meio de dois métodos não paramétricos, para produtividade de grãos, de 20 genótipos de trigo, sendo 18 linhagens mexicanas e duas cultivares comerciais, avaliadas em três locais do Estado de São Paulo, durante 2001 e 2002. Foram observados efeitos significativos para as fontes de variação genótipos, anos e locais, constatando-se que o comportamento das linhagens não foi coincidente para os dois anos e para os três locais de avaliação. As interações genótipos x locais, anos x locais e genótipos x locais x anos foram estatisticamente significativas. Independentemente do método e considerando a análise para os dois anos e os três locais, as linhagens 13 (HAHN/2*WEAVER) e 3 (SERI M 82) figuraram entre as cinco primeiras no ranqueamento, com adaptabilidade e estabilidade amplas. Estas linhagens, em especial a linhagem 13, poderiam ser recomendadas para cultivo pelos agricultores desde que sejam avaliados outros caracteres agronômicas de interesse, entre eles o porte da planta, a resistência às doenças e a tolerância ao alumínio tóxico. Os dois procedimentos forneceram resultados semelhantes, de fácil estimativa e sobretudo fácil interpretação. Palavras-chave:Triticum aestivum L., genótipos, produtividade de grãos. ABSTRACT ADAPTABILITY AND STABILITY INBRED WHEAT LINES OF IN SÃO PAULO STATEAdaptability and Stability parameters were estimated by two non-parametric methodologies for grain yield in 20 wheat genotypes, 18 Mexican inbred lines and two cultivars, which were evaluated in three locations of São Paulo State, during 2001 and 2002. Significant effects were observed for genotypes, years and locations, indicating that the performance of the inbred lines was not coincident for the two years and the three locations. Genotypes x locations, years x locations and genotypes x years x locations interactions were significant. Independently of the methodology and considering the analysis for the two years and for the three locations, inbred lines 13 (HAHN/2*WEAVER) and 3 (SERI M 82) ranked among the five, with wide adaptability and stability. These inbred lines, specially the 13, could be recommended for cultivation by growers after the evaluation of other interesting agronomic traits, such as plant height, disease resistance and aluminum tolerance. The two methodologies provided similar results with easy estimates and interpretation.

Leaf spot of loquat (Eriobotrya japonica) caused by Pseudocercospora eriobotryae in Brazil

“…It is also grown in cooler parts of south and southeastern Brazil. Although Brazil is one of the largest producers of loquat (Caballero and Fernández 2003), little has been investigated and published about the pathogens attacking loquat in Brazil and the crop is not mentioned in the main Brazilian plant disease compendium (Amorim et al 2016). Only four fungal species are listed as occurring in Brazil on this host by Mendes and Urben (2017).…”

Phenotype adaptability and stability of sugarcane genotypes in the sugarcane belt of the State of Pernambuco, Brazil

“…From Amorim et al (2006), the method proposed by Annicchiarico considers an ideal genotype that with the highest percent mean and the highest recommendation index. Based on these considerations, it is concluded that, genotypes RB863129, RB867515, RB92579, RB953180, and SP81-3250 exhibited higher general adaptability in terms of Phenotype adaptability and stability of sugarcane genotypes TPH, which entitles them to be recommended for growth in the five environments surveyed.…”

Genetic analyses, phenotypic adaptability and stability in sugarcane genotypes for commercial cultivation in Pernambuco

“…According to Amorim et al (2006), the method proposed by Annicchiarico (1992) considers that an ideal genotype has the highest mean percentage and the highest recommendation index. By using this method, it is possible to classify sugarcane microregions on the basis of favorable and unfavorable environments (Table 7).…”