Adaptability and stability of organic-grown arabica coffee production using the modified centroid method

Abstract This study aimed to identify promising arabica coffee genotypes for organic systems. The experiments were arranged in a randomized block design, with 30 genotypes and three replications. The adaptability and stability analysis was carried out using the modified centroid method, considering the mean yield of two biennia (2005/2006 and 2006/2007, 2007/2008 and 2008/2009) in three municipalities (Araponga, Espera Feliz, and Tombos), totaling six environments. Significant genotype x environment interaction was observed for yield, and the municipality of Espera Feliz was the only favorable environment. Genotypes were classified into four of the seven groups proposed by the modified centroid method: maximum general adaptability (I), minimum adaptability (IV), mean general adaptability (V), and mean specific adaptability to favorable environments (VI). Cultivars IBC Palma 1, CatucaíAmarelo24/137, Sabiá 708, and H 518 are widely adapted, stable, productive and suitable for organic farming.

摘要 本研究旨在筛选适配有机种植体系的优质阿拉比卡咖啡（Arabica coffee）基因型。本试验采用随机区组设计，共设置30个供试基因型与3次重复。本研究采用改良质心法开展适应性与稳定性分析，以3个试点（阿拉庞加、埃斯佩阿费利斯、通博斯）内两组双年度（2005/2006与2006/2007、2007/2008与2008/2009）的平均产量为分析依据，共计形成6个试验环境。研究观测到产量性状存在显著的基因型×环境互作效应，且仅埃斯佩阿费利斯试点为唯一有利试验环境。依据改良质心法提出的7组分类标准，供试基因型被划分为其中4组：极强广适性（第I组）、极弱适应性（第IV组）、中等广适性（第V组）以及对有利环境具备中等专属适应性（第VI组）。品种IBC Palma 1、卡特卡伊黄24/137（CatucaíAmarelo24/137）、萨比亚708（Sabiá 708）以及H 518具备广适性、稳产性与高产性，适配有机种植体系。