Grain yield, adaptability and stability of soybean genotypes in different Cerrado environments of Piauí, Brazil

Abstract

The objective of the present study was to evaluate the grain yield and the phenotypic adaptability and stability of soybean genotypes in different Cerrado environments of Piauí, Brazil, to provide indications for cultivation in the region. Therefore, we evaluated 23 soybean genotypes and three checks in three different site (Bom Jesus-PI, Monte Alegre-PI and Currais-PI) and environments (crop year 2010/11, 2011/12 and 2012/13). Experiments were carried out in a randomized complete block design with four replications. The behavior for the average grain yield of genotypes within and among environments was verified using the Scott Knott’s method of clustering of means (P <0.05). For the study of adaptability and stability, the methods of analysis of Eberhart and Russell and AMMI were used. Genotypes had the best performance of genetic potential in 2010/11 crop year. The best group in Bom Jesus-PI consisted of 16 genotypes and had an average grain yield higher than 3181.61 kg ha-1, what is well above the global average grain yield (2108.26 kg ha-1). G5 and G9 genotypes were the ones with greater adaptability and stability in the three environments with high average grain yield (2362.5 kg ha-1). Therefore, the identification of genotypes presenting such behavior is important for recommending cultivation in the studied environments or in similar areas. It was possible to identify genotypes that have high grain yield and that are stable and adapted for cultivation in the Cerrado at Piauí state.

Performance, Adaptability and Stability of Soybean Cultivars Submitted to Different Environments Conditions

“…IPCA 2 explained 21.26% of the interaction, while IPCA 3 explained 21.17%. In this analysis, the ideal that the first two main components explain 70% or more of the total accumulated and explained variation of all components (Alcâ ntara Neto et al, 2018). In the present study, it was 81.01% ISSN 2166-0379 2020 for IPCA1 and IPCA2, in agreement with Silveira et al (2018).…”

Bradyrhizobium brasilense as an efficient soybean microsymbiont in two contrasting soils of the southwestern region of Piauí (Cerrado biome)

“…Soybean production in Piauí State (2,447.620 tons) represents only 2% of the Brazilian crop production (IBGE, 2020). However, in this state, especially in the southwestern mesoregion, which is considered one of the last agricultural frontiers in the country, there has been an extensive increase in soybean production and yield over the last few years (Alcântara Neto et al, 2018).…”