Agronomic performance of recombinant chili pepper inbred lines in two cultivation systems/Desempenho agronomico de linhas endogamicas recombinadas de pimenta em dois sistemas de cultivo

• Published in: Ciência rural 2009-08, Vol.39 (5), p.1387
• Main Authors: Moreira, Sarah Ola, Rodrigues, Rosana, de Araujo, Maria Luiza, Sudre, Claudia Pombo, Riva-Souza, Elaine Manelli
• Format: Article
• Language: Spanish
• ISSN: 0103-8478

Climate and management diversity play an important role in crop production, since these characteristics are related to genotype and cultivation environment. The aim of this study was to evaluate the effects of genotype, environment and genotype-environmental interaction (GE) in 12 recombinant inbred lines of C. annuum. These lines were originated from crosses between the following accessions: a sweet pepper cultivar (susceptible to bacterial spot) and a chili pepper (resistant to bacterial spot). Two tests were conducted, the first in a conventional agriculture system, under field conditions and the second in ecological or organic system, under greenhouse conditions. The field experiment was carried out in Campos dos Goytacazes, RJ. The greenhouse experiment was conducted in Seropedica, RJ. Both experiments were performed using a randomized block design with three replications. The measured variables were total fruit number (TFN); total fruit weight (TFW); mean fruit weight (MFW); fruit length (FL); fruit diameter (FD); length/diameter fruit ratio (FL/FD) and capsaicin presence (CAPS). Data obtained for each experimental condition were submitted to variance analysis, joint variance analysis, and partitioning of genotype environment interaction. Genotype and GE quadratic components, genotypic determination coefficient, genetic variation coefficient and variation index were determined. The GE interaction was significant for TFN, TFW, MFN, FD, and FL/FD. Cultivation under greenhouse conditions was responsible for the highest mean performance for every trait studied but FL. Values observed for genetic variation were greater than values obtained for environmental variation. For field conditions, the high yield ability observed for line 2 (pungent) is suggestive of a potential to be used as a commercial genotype. For greenhouse conditions, line 8 (pungent), had higher fruit number yield. Line 1 (non-pungent) also seems promising for commercial cultivation under both conditions. Key words: Capsicum annuum L., conventional agriculture system, organic system under greenhouse, environment and the genotype- environmental interaction. As diversidades de clima e de manejo interferem no desenvolvimento e na produtividade vegetal, uma vez que essas caracteristicas estao diretamente correlacionadas ao genotipo e ao ambiente de cultivo. Neste estudo, o objetivo foi estimar os efeitos do tipo de manejo sob o desempenho agronomico de 12 linhas endogamicas recombinadas (F7) d