Evaluation of phenotypic stability of cassava clones by AMMI analysis in northwestern Paraná state

Abstract

High yield stability and adaptability of storage root are highly desirable attributes of cassava clones. The objective of this study was therefore to evaluate the effect of the genotype x environment interaction (G x E) and the stability of cassava clones developed at IAC. A subset of eight cassava genotypes was chosen in trials of storage root yield, arranged in a randomized complete block design with four replications, in two counties (Araruna and Maringá), in the northwestern region of Paraná State, over five growing seasons (1997)(1998)(1999)(2000)(2001). The G x E interaction was evaluated by joint variance analysis and stability and adaptability by AMMI analysis. The G x E interaction was significant (P<0.05) for storage root yield. Results indicated AMMI analysis as an efficient tool for the evaluation of phenotypic adaptability and stability of cassava clones and IAC 190 as the most promising clone.

Phenotypic stability in cassava estimated by the AMMI analysis with supplementary genotypes

“…Significant interactions between environment and cassava cultivars have been reported by different authors (Rimoldi et al 2003, Kvitschal et al 2007, Kvitschal et al 2009, Costa et al 2013, Santiago et al 2015. The GxE interaction was decomposed by the AMMI into two principal components, but only de first axis was significant based on the F R test (Cornelius et al 1992).…”

“…Comparison of AMMI analysis applied to several different cultures indicates that this analysis typically explains 60% of the total variation by the SSGE interaction (Carbonell et al 2004, Kvitschal et al 2007, Gonçalves et al 2010, Barros et al 2013, Costa et al 2013, Mattos et al 2013, Oliveira et al 2014). …”

“…Limoeiro de Anadia (E1), Arapiraca (E2) and Lagoa da Canoa (E3) have mean root yield of 35.58 ton ha -1 , 20.14 ton ha -1 , and 35 ton ha -1 , respectively (Tables 1 and 2). Kvitschal et al (2007) evaluated the adaptability and yield stability of cassava in the state of Paraná, and concluded that the analysis was efficient in evaluating yield stability and adaptability, indicating the clone IAC 190 as the most promising variety.…”

“…Therefore, the study on both adaptability and stability of genotypes is desirable in order to identify those with the most predictable responses to diverse environments. Among the several methodologies to analyze adaptability and stability (Eberhart and Russel 1966, Lin and Binns 1988, Gauch and Zobel 1996, Toler and Burrows 1998, the multivariate AMMI or Additive Main Effects and Multiplicative Interaction Analysis is the most widely used in Brazil (Carbonell et al 2004, Pacheco et al 2005, Kvitschal et al 2007, Kvitschal et al 2009, Gonçalves et al 2010, Oliveira et al 2010, Mattos et al 2013, Barros et al 2013, Oliveira et al 2014. This method combines analysis of variance and principal components to adjust the main effects (genotypes and environments) and the effects of G×E interactions Vencovsky 2001, Zobel et al 1988).…”

Comparison of methods for phenotypic stability analysis of cassava (Manihot esculenta Crantz) genotypes for yield and storage root dry matter content

“…As a consequence of its diverse cropping conditions, cassava shows a strong and significant genotype x environment (G x E) interaction effect (Fukuda, 1996;Kvitschal et al, 2007), which makes selection difficult. The cassava breeding selection for superior genotypes should be performed taking G x E interaction effect in consideration.…”