Adaptability and stability of pepper hybrids under conventional and organic production systems

Abstract

Pepper is one of the main vegetable crops commercialized in Brazil and it is grown throughout the country. The objective of this study was to estimate genetic parameters and predict the genotypic values involved in agronomic traits of hybrid pepper in two different cropping systems in order to verify adaptability and genotypic stability. The experiment was carried out at the Experimental Station Luiz Jorge da Gama Wanderley from IPA, located in Vitoria de Santo Antão, Pernambuco State, Brazil, from October 2010 to March 2011. Seven hybrids were evaluated in two trials, the first in conventional farming system and the second in organic cultivation system. Randomized blocks were used with seven treatments, four replications and plots consisting of six plants. We evaluated the following fruit variables: total mass (MTF), total number (NTF), average length (CMF), average diameter (DMF), number of locules (NL) and average thickness of the pericarp (EP). Statistical analyzes and estimation of genetic parameters were based on mixed models of type REML/BLUP, using the statistical model and software SELEGEN 151. All traits showed good accuracy. The genotype average heritability (h2mg) was lower than 80% only for the trait NTF. Some characters had h2mg close to 100% such as CMF and DMF with 99.1% and 98.3%, respectively. The hybrids presenting a predicted genotypic effect higher than the average were: Atlantis, Máximos, Solario and Rubia R for NTF, Solario and Atlantis for MFT, Impacto, Máximos, Atlantis, Hebron and Rubia R to CMF, Solario and Enterprise for DMF, Solario, Impacto, Rubia R and Atlantis for NL and Solario and Enterprise for EP. Hybrids presenting the highest performance in the traits evaluated for each system were the same selected based on the joint analysis of the studied systems, showing stability and enabling their indication for organic and conventional cropping systems.

Genotype x environment interaction on experimental hybrids of chili pepper

“…In contrast, there was no significant difference for CD, PH, PTH, and SSC (Table 2). Previous studies demonstrated significant GxE interactions in vegetables, mainly for quantitative traits (Moreira et al, 2009;Pimenta et al, 2016). In this study, the GxE interaction is explained not only by the quantitative nature of the traits but also because environments are different, as indicated by ANOVA combined analysis, in which environmental effects were the main contributors to the sum of total square.…”

ANÁLISE OPERACIONAL DA DERRUBADA DE ÁRVORES COM HARVESTER EM CORTE RASO DE POVOAMENTOS DE Pinus taeda L.

“…De acordo com Reifschneider (2000), os frutos de pimentão possuem elevados teores de vitaminas A, C e E, sais minerais, cálcio, sódio, fósforo e ferro. Apresentam coloração vermelha, amarela, ou de outras cores, quando maduros (FILGUEIRA, 2007) O pimentão é cultivado em todo território nacional, estando entre as principais olerícolas comercializadas no país (PIMENTA et al, 2016), com destaque aos estados de São Paulo, Santa Catarina, Minas Gerais, Rio de Janeiro e os estados do Nordeste, como maiores produtores dessa hortaliça (MALDONADO, 2000).…”

Identifying resistance to root-knot nematodes in Capsicum genotypes

“…is gaining notoriety in the Brazilian market, due to the growing demand in the segment of fresh vegetables, condiments, seasonings and preserves. Among the domesticated species of Capsicum, the sweet pepper (Capsicum annuum L.) stands out for the high yield and economic value (BÜTTOW et al, 2010;PIMENTA et al, 2016), with an estimated national production area of 12.000 hectares (MOURA et al, 2012). In Brazil, the main producing regions are the Southeast and Center-West, especially the state of São Paulo, which produced, in the 2012 harvest, 65.6 thousand tons in 2.2 thousand hectares (IEA, 2016).…”