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Silva WJDS, de Alcântara Neto F, Al-Qahtani WH, Okla MK, Al-Hashimi A, Vieira PFDMJ, Gravina GDA, Zuffo AM, Dutra AF, Carvalho LCB, de Sousa RS, Pereira APDA, Leite WDS, da Silva Júnior GB, da Silva AC, Leite MRL, Lustosa Sobrinho R, AbdElgawad H. Yield of soybean genotypes identified through GGE biplot and path analysis. PLoS One 2022; 17:e0274726. [PMID: 36223386 PMCID: PMC9555624 DOI: 10.1371/journal.pone.0274726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 09/04/2022] [Indexed: 11/19/2022] Open
Abstract
Genotype × environment (G×E) interaction is an important source of variation in soybean yield, which can significantly influence selection in breeding programs. This study aimed to select superior soybean genotypes for performance and yield stability, from data from multi-environment trials (METs), through GGE biplot analysis that combines the main effects of the genotype (G) plus the genotype-by-environment (G×E) interaction. As well as, through path analysis, determine the direct and indirect influences of yield components on soybean grain yield, as a genotype selection strategy. Eight soybean genotypes from the breeding program of Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) were evaluated in field trials using a randomized block experimental design, in an 8 x 8 factorial scheme with four replications in eight different environments of the Cerrado of Northeastern Brazil during two crop seasons. Phenotypic performance data were measured for the number of days to flowering (NDF), height of first pod insertion (HPI), final plant height (FPH), number of days to maturity (NDM), mass of 100 grains (M100) and grain yield (GY). The results revealed that the variance due to genotype, environment, and G×E interaction was highly significant (P < 0.001) for all traits. The ST820RR, BRS 333RR, BRS SambaíbaRR, M9144RR and M9056RR genotypes exhibited the greatest GY stability in the environments studied. However, only the BRS 333RR genotype, followed by the M9144RR, was able to combine good productive performance with high yield stability. The study also revealed that the HPI and the NDM are traits that should be prioritized in the selection of soybean genotypes due to the direct and indirect effects on the GY.
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Affiliation(s)
| | | | - Wahidah H. Al-Qahtani
- Department of Food Sciences & Nutrition, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Mohammad K. Okla
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Abdulrahman Al-Hashimi
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | | | | | | | | | | | - Ricardo Silva de Sousa
- Department of Agricultural and Soil Engineering, Federal University of Piauí, Teresina, Piauí, Brazil
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Viana JBV, Querino RB, Carvalho LCB, Lima PSC. Sequence analysis of the internal transcribed spacer 2 (ITS2) region of rDNA for identifying Trichogramma species and evaluating genetic diversity. BRAZ J BIOL 2021; 81:928-933. [PMID: 33053130 DOI: 10.1590/1519-6984.232362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 05/06/2020] [Indexed: 11/21/2022] Open
Abstract
Species of Trichogramma Westwood, 1833 (Hymenoptera: Trichogrammtidae) are frequently used as biological control agents against Lepidoptera, but practical application of these egg endoparasitoids are complicated because of their complex taxonomy. This study aimed to compare sequences of internal transcribed spacer regions of ribosomal DNA (ITS2-rDNA) of Trichogramma accessions with those deposited in GenBank in order to access the reliability of the ITS2 as a barcode for discriminating species and evaluating the genetic diversity. ITS2-rDNA sequences obtained from seventeen specimens of Trichogramma confirmed previous identifications based on morphological characteristics. Multiple sequence alignment revealed the existence of highly conserved regions in ITS2 sequences while the neighbour-joining dendrogram indicated that the specimens formed three clusters comprising T. manicobai and T. marandobai (group I), T. galloi (group II) and T. pretiosum (group III). The ITS2 marker was shown to be a powerful DNA barcode for discriminating Trichogramma species and could be used to complement the morphological approach.
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Affiliation(s)
- J B V Viana
- Universidade Federal do Piauí - UFPI, Centro de Ciências Agrárias - CCA, Programa de Pós-graduação em Genética e Melhoramento, Teresina, PI, Brasil
| | | | - L C B Carvalho
- Universidade Federal do Piauí - UFPI, Centro de Ciências Agrárias - CCA, Programa de Pós-graduação em Genética e Melhoramento, Teresina, PI, Brasil
| | - P S C Lima
- Embrapa Meio Norte, Teresina, PI, Brasil
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