CHARACTERISTIC STABILITY ANALYSIS OF EGGPLANT (Solanum melongena L.) GENOTYPES USING PARAMETRIC AND NONPARAMETRIC APPROACHES

Abstract

Eggplant (Solanum melongena L.) is one of the important horticultural commodities in Indonesia that has a high productivity. Indonesia has an abundant eggplant germplasm collection in which some have a potential to become a superior variety. Stability analysis of prospective genotypes in different environments is needed to observe its general performance. This research aim to analyze eggplant genotypes performance and appearance in different locations based on altitude. Efforts to quantify the interaction between specific eggplant characteristics and environment can be done with both parametric and non-parametric approaches. A total of 25 eggplant genotypes were planted in three different locations in West Java, Indonesia during the time period of May 2014 – July 2015. This research was conducted using randomized complete block design in each location. Variables observed are fruit length, fruit diameter, fruit weight, plant height and stem diameter. Combined analysis of variance showed highly significant effect of location, genotypes and genotypes x location for all variables observed. Genotypes 2014-044, 2014-047, 2014-077a and 2014-071 were stable based on parametric analysis using Wricke (1962), Finlay & Wilkinson (1963), Eberhart & Russel (1966), Shukla (1972) and Francis & Kannenberg (1978) methods. Nonparametric analysis using Kang (1988) and Thennarasu (1955) methods showed that genotypes 2014-033, 2014-024, 2014-080, 2014-071 and THP were stable. Overall, genotype 2014-071 was the only genotype that was stable in both parametric and nonparametric analysis. This genotype performs well and has generally consistent appearance in all location.