Influence of genotypes and environment on eggplant yield

Abstract

One of the goals in eggplant breeding (Solanum melongena L .) is higher yield, as well as adaptation to different environments. Our study included 20 different eggplant genotypes. The experiment was conducted at three different locations (Smederevska Palanka, Vranovo and Kusadak) using a randomized complete block design in three replications. The influence of two factors on yield per plant was examined: genotype and location. Two-factor ANOVA showed a significant influence of genotype, location as well as genotype x location interaction on yield per plant . After the analysis of 20 genotypes at three different locations, the recorded average yield per plant was 2 .47 kg. Significantly higher yields per plant than the general average were recorded for genotypes K13 (3 .02 kg), K20 (2 .99 kg), K21 (3 .44 kg), K34 (4 .35 kg), K39 (4 .28 kg). The hig-hest yield had the genotype K34 at the location Vranovo (4 .71 kg). At the locatio of Smederevska Palanka, genotype K39 had the highest average value, while genotype K1 (1 .09 kg) had the lowest yield below the general average. Genotype K39 had a significantly higher yield per plant above the average value at the Kusadak site. Based on the results of AMMI analysis, it can be concluded that there are significant differences between locations, genotypes as well as interactions (Table 3). Of the total sum of squares, 86 .10% refers to the effect of genotype, while the sum of squares of genotype × location is three times higher than the sum of squares of location (10 .25% compared to 3 .07%). The most stable location based on the AMMI stability coefficient (0 .92) was Smede-revska Palanka, while the least stable was Kusadak (2 .34). Genotypes K13, K39, K36, with a yield above the general average, had a low value of PC1, which indicates that they were less influenced by locations, ie. that they had good yield stability in all locations . Genotype K34 stood out as the most productive genotype. Genotypes K3, K7, K16, K19 and K38 were below the average yield value but proved to be stable . The strongest interaction (ASV) was observed in genotypes K1 (below average yield) and K21, K25 (above average yield), where the last two are closely adapted to the location Kusadak.