Adaptability and stability study of soybean lines developed for high yield in Paraná State using four methodologies

Abstract

An adaptability and stability study was carried out using soybean yield data from several locations in Paraná State, obtained from 1990 to 1999. The main objectives were: a) to check the efficiency of the Embrapa Soja breeding program for selecting the highest yielding lines with specific (regional) or broad adaptation; b) to analyze the performance of the control cultivars under favorable and unfavorable conditions; c) to identify the best stability methodology for inbred line evaluation. The evaluated lines were classified into early (L), semiearly (M) and medium (N) maturity groups. A randomized complete block design with four replications was used in each location and all analyses were carried out by maturity group. The number of M maturity lines that scored higher than the controls BR-16 and Embrapa 4 increased along the years, especially in unfavorable environments. On the other hand, the number of L and N maturity groups scoring higher than the controls either remained constant or fluctuated (increasing or decreasing) with time. The controls FT-Guaíra, Embrapa 4, BR-16 and FT-10 and the great majority of the tested lines showed broad adaptation. IAS 5 and FT-Abyara showed adaptation to poor environments and also broad adaptation. The analysis of the means in favorable and unfavorable environments was the most efficient method for soybean line evaluation. A methodology to classify soybean genotypes was proposed, based on these means.

Stability Analysis of Some Soybean Genotypes Using Parametric and Nonparametric Methods in Multi-Environments

“…Also, genotypes KASM 02, KASM 03 and KANA having seed yields near to average yield and regression coefficients near to 1.0 were moderately adapted to all environments, whereas standard cultivars (ARISOY, ATAEM 07, BRAVO and NOVA) having lower seed yields than average and regression coefficients near to 1.0 were poorly adapted to all environments. Our findings correspond to that of Tadesse et al (1997), Carvalho et al (2002), Hossain et al (2003), Oliveira et al (2012), El-Refaey et al ( 2013) and Morsy et al (2015), who reported that some cultivars had high yields under favourable environments, while others adapted to poor environments. In addition, the current results are supported the conclusion of Yothasiri and Somwang (2000), Primomo et al (2002) and Olievira et al (2012) who reported that genotypes with higher stability or good adaptability in a wide range of environment were found for seed yield.…”

“…The coefficient of variation (CV) determined as 9.89% in the combined variance analysis for seed yield. Carvalho et al (2002) reported that a maximum variation coefficient of 16.0% can be proposed for seed yield under field conditions. Our findings on the coefficient of variation correspond to that of Cucolotto et al (2007).…”

Investigation of yield and yield components in main crop soybean genotypes in Adana conditions

“…Therefore, while the average seed yield of the variyeties was 6316 kg ha -1 in 2015, the average of the varieties remained at 3994 kg ha (2015) seed yields vary between 4288-5377 kg ha -1 and Ozkan et al, (2019) 1330-4010 kg ha -1 and Ahmadi and Arien (2022) 1046-1212 kg ha -1 and they reported that the seed yield was more affected by the environment and agricultural practices. Mebrahtu and Elmi (1997), Carvalho et al (2002), Hossain et al (2003), Oliveira et al (2012), El-Refaey et al (2013, and Morsy et al (2015) reported that some varieties have high yields in suitable environments, while others are adapted to bad environments. In addition, Yothasiri and Somwang (2000), Primomo et al, Sudaric et al, (2006), in their study on soybean, reported that the interaction of environment, genotype, and GE is important in terms of seed yield.…”