Western Amazon Research Articles

Simulated isotopic fingerprint of the Atlantic Multidecadal Oscillation over South America and its relation to the Little Ice Age

Linkages have been established between the Atlantic Multidecadal Oscillation (AMO) and surface air temperature variations, low-level jet streams, and precipitation trends in both northeastern Brazil and southeastern South America. Previous studies have discerned distinct wet-season (March–May) precipitation responses in northeastern Brazil, with cold (warm) AMO phases triggering increased (decreased) precipitation. Findings from various records indicate that the AMO's variability extends for thousands of years. A recent reconstruction suggests a significant AMO role in the shift from the Medieval Climate Anomaly (MCA) to the Little Ice Age (LIA) and reveals the LIA as the longest period with a persistent cold anomaly in the North Atlantic over the past ∼3 millennia. Stable oxygen isotope records from South America show typical AMO periodicities (~65 years), however, despite increased paleo precipitation data, the AMO's role in South American precipitation during the LIA and MCA remains unclear. In this study, the influence of AMO phases on atmospheric dynamics, precipitation patterns, and stable oxygen isotope composition (δ18O) of precipitation over South America is assessed using the water isotope-enabled version of the Community Earth System Model version 1.2 (iCESM1.2). This research sheds light on the connection between AMO-induced precipitation anomalies and isotopic signals observed in paleoclimate records and emphasizes the significance of isotope-enabled climate models in unraveling the mechanisms behind past variations. The analysis involves comparing δ18O simulations with published reconstructions from South America. By utilizing climate models that incorporate isotopes, we can delve deeper into understanding the impact of the AMO on precipitation patterns and isotopic ratios. Contrary to expectations, the simulated δ18Op signal differ from speleothem records over the western Amazon and Andes during the LIA. That is, the simulated significant total precipitation amounts change over the western Amazon and Andes are not reflected in δ18Op depletion.

Development and cultural adaptation of text messages for promoting healthy eating among Amazonian schoolchildren.

To develop text messages for a mHealth intervention promoting healthy eating among Amazonian schoolchildren. Two rounds of expert panel analysis and formative research interviews. Western Brazilian Amazon, Cruzeiro do Sul, Acre, Brazil. Included 17 healthcare professionals and 40 caregivers of school-aged children enrolled in the Maternal and Child Health and Nutrition in Acre birth cohort study. Evaluation focused on messages' cultural appropriateness, comprehensibility, and relevance, along with caregivers' understanding and intention to adhere to the recommendations. Quantitative analysis employed the modified Cohen Kappa, the Scale-Content Validity Index Average (S-CVI-Ave), frequency calculations, and a ranking system. Fifty-five text messages were drafted. In the initial stage, eight messages did not achieve a sufficient score and were subsequently revised and reevaluated, ultimately gaining approval. The S-CVI-Ave for each domain was as follows: cultural appropriateness=0.97, comprehensibility=0.96, and relevance=0.97. Formative research indicated a 92% understanding rate and a 70% intention rate to adhere to the proposed suggestions. The final set of messages was successfully culturally adapted and will contribute to the translation and dissemination of Dietary Guidelines for Brazilian Population recommendations to Western Amazon families.

The Combined and Isolated Impacts of El Niño and Positive Indian Ocean Dipole Events on South American Precipitation During Austral Winter and Spring Depending on the Atlantic Multidecadal Oscillation Phases

ABSTRACTThe isolated/combined impacts of the positive Indian Ocean Dipole (pIOD) and El Niño (EN) events on precipitation in South America (SA) were investigated during austral winter and spring for the 1901–2012 period, considering both Atlantic Multidecadal Oscillation (AMO) phases. Under the warm phase (WAMO), EN events are well characterised in winter and, in spring, are accompanied by anomalous warming of the Tropical North Atlantic (TNA); thus, variations in the Walker circulation and the northward shifted Intertropical Convergence Zone (ITCZ) reduce precipitation over northern SA. In the cold AMO phase (CAMO), EN events are weak in winter. At the same time, an intense cooling in the equatorial North Atlantic, favoured by the CAMO, enhances moisture transport from the Amazon to central and southeastern Brazil, increasing precipitation in the South Atlantic Convergence Zone region. As EN develops in spring, the anticyclone off the east coast of SA associated with the Pacific‐South American (PSA) pattern decreases (increases) precipitation in central (southeastern) SA. The pIOD events predominantly occur during WAMO phase, when warming in the TNA is favoured by AMO. In winter, the moisture transport to northern SA is weakened, and the ITCZ remains northward shifted, inhibiting the precipitation over northeastern Brazil and southeastern Amazon. In spring, pIOD intensified ascending motions in equatorial Atlantic, increasing precipitation over northeastern Brazil. A wave train from the Indian Ocean strengthens the South Atlantic subtropical high, suppressing precipitation in central and eastern SA. EN‐pIOD events are well established in both AMO phases, though the sea surface temperature anomalies in the TNA depend on the AMO. During WAMO, reduced precipitation in western Amazon and northeastern SA is influenced by the Walker circulation, while in CAMO, TNA cooling enhances moisture transport from the Amazon into southeastern SA, where the PSA pattern and wave train from the Indian Ocean increase precipitation.

Comparative analysis of EPIK, DRASTIC, and DRASTIC-LUC methods for groundwater vulnerability assessment in karst aquifers of the Western Amazon Basin

Comparative analysis of EPIK, DRASTIC, and DRASTIC-LUC methods for groundwater vulnerability assessment in karst aquifers of the Western Amazon Basin

Ciclo de maturação e relações entre grãos processados e frutos de café robustas amazônicos

ABSTRACT This study aimed to characterize the outturn index, field outturn index, uniformity of maturity, and maturation cycle of fifteen Coffea canephora genotypes grown in different environments of the Western Amazon. Conducted in Amazonas (Itacoatiara and Manaus) and Rondônia (Porto Velho), the research evaluated the performance of ten cultivars and five promising genotypes from Embrapa. The genotype × environment interaction was significant, indicating different performance of clones across environments. Genotypic coefficients surpassed environmental ones, indicating a genetic influence on outturn indices and uniformity of maturity. The mean outturn index was 24.68%, and the field outturn index was 22.57%, with Itacoatiara having the highest mean values. The overall mean fruit uniformity of maturity was 63.02%, with Porto Velho achieving the highest mean uniformity value (71.78%). The cultivar BRS1216 exhibited the best performance for outturn indices and provided the highest gain from selection across environments, showing wide adaptability for the outturn index and adaptability to environments favorable for field outturn. Cultivars BRS3210 and BRS3220 achieved more than 82% uniformity of maturity across locations, with BRS3210 adapting to favorable environments and BRS3220 adapting to unfavorable ones. Additionally, BRS3220 had a high mean field outturn index, indicating wide adaptability and high phenotypic stability. The evaluated Amazon Robusta clones and cultivars displayed the expected maturation cycles.

Pacific decadal oscillation and ENSO forcings of northerly low-level jets in South America

The hydrological cycle in South America during austral summer, including extreme precipitation and floods, is significantly influenced by northerly low-level jets (LLJs) along the eastern Andes. These synoptic weather events have been associated with three different types of LLJs (Central, Northern, and Andes) and are sensitive to remote large-scale forcings. This study investigates how tropical forcings related to El Niño/Southern Oscillation (ENSO) and Pacific Decadal Oscillation (PDO) regulate the duration and frequency of each LLJ type and their impacts on extreme precipitation. Our analysis reveals that ENSO and PDO are important in driving the variability of LLJs over the past 65 years. Specifically, the Central LLJ type is more prevalent during El Niño and Warm/Neutral PDO phases, leading to heightened extreme precipitation in southern South America. Conversely, La Niña years during Cold PDO phases tend to favor the Northern and Andes LLJs, which are associated with increased precipitation extremes in the western Amazon and southeastern South America. Central and Andes LLJs tend to persist longer during these favored conditions, causing more pronounced precipitation events in the areas under their influence. This study enhances our understanding of the influence of large-scale atmospheric forcings on the regional precipitation dynamics in South America.

Sand Fly Fauna in Urban Parks in the Brazilian Western Amazon: Potential Areas for American Cutaneous Leishmaniasis Transmission.

Sand flies are a group of insects (Diptera, Psychodidae, Phlebotominae) in which some species may transmit agents of leishmaniasis. This study aimed to analyze the sand fly fauna in urban parks in Rio Branco, capital of Acre state, addressing its diversity, infection by Leishmania, and food sources in sand fly females. The sand flies were collected with CDC-type automatic light traps installed in three urban parks in Rio Branco: Captain Ciríaco, Horto Florestal and Chico Mendes. For comparison analysis of species richness and diversity between the parks, we analyzed rarefaction and prediction curves. For detection of Leishmania spp., molecular tests were performed by polymerase chain reaction (PCR) using ITS1 as a marker, followed by genetic sequencing. Identification of the blood meal source in engorged females was performed by PCR using a fragment of the cytochrome b gene (cyt b), followed by sequencing and phylogenetic analysis. A total of 2,672 specimens were collected, distributed in 14 genera and 35 species. Of these, Nyssomyia antunesi and Evandromyia walkeri predominated, and important proven and suspected vectors were also found. Horto Florestal was the park with the greatest diversity, richness, and evenness of species, while the Captain Ciríaco presented the lowest diversity and richness. A female of Ny. antunesi was PCR-positive for Leishmania guyanensis. Human blood was the most frequent food source detected, mainly in Ev. walkeri and Ny. antunesi. This research showed that the studied parks of Rio Branco can act as foci for the maintenance of Leishmania, and people who frequent these urban areas may be in risk for contracting leishmaniasis.

Three new species of Scottmoria (Lecythidaceae) from northwestern South America

Three new species of Neotropical Lecythidaceae are formally described: Scottmoria albomarginata from western Ecuador, S. decurrens from northwestern Ecuador to western Colombia, and S. spiralocucullata from western Amazonia in eastern Ecuador to the westernmost state of Acre in Brazil. The new species are illustrated and the relationships with related species are discussed.

Insectos visitantes florales de Phytelephas macrocarpa (Arecaceae), una palma dioica al noroeste de la Amazonia peruana

Phytelephas macrocarpa is a dioecious palm that lacks studies on the entomofauna that visit its flowers in western Amazonia. In this study we identified the insect visitors and their interaction with the inflorescences of P. macrocarpa in two localities in northwestern Peruvian Amazonia. Additionally, the richness and abundance of these insects was determined. For this purpose, six inflorescences were collected per locality (three male and three female). During field trips, the interactions of the insects on the inflorescences were observed. A total of 28 106 insects distributed in 27 species were recorded, where Amazoncharis sp., Aleochara sp. and Anchylorhynchus sp. were the most abundant. Twelve species were also recognized as pollinators, 10 as pollinivores and 5 as saprophagous. The floral visitor community is mainly composed of insects of the orders Coleoptera, Hymenoptera and Diptera. The families Staphylinidae, Curculionidae and Nitidulidae are the main pollination-related visitors, which help in the reproductive biology of the palm and, therefore, contribute to the conservation of the species.

Can we wash away love with bleach? Affect, gender, and agency in Western Amazonia

Can we wash away love with bleach? Affect, gender, and agency in Western Amazonia

Geographical variation in Tachycineta Swallows (Aves: Passeriformes: Hirundinidae), with description of a new subspecies from Colombia

Dark-winged Tachycineta swallows occurring west of the Andes in Colombia have confounded observers for decades. With a view to assessing their taxonomic rank, geographical variations in voice, plumage and biometrics were studied as between western Colombian birds ("Magdalena Swallows") and all members of subgenus Leucochelidon, i.e. Mangrove Swallow T. albilinea of Central America, White-winged Swallow T. albiventer of East of the Andes, Chilean Swallow T. meyeni and White-rumped Swallow T. leucorrhoa of southern South America and Tumbes Swallow T. stolzmanni of western Ecuador and Peru. A 'yardstick' methodology was applied, measuring and comparing differentiation between species using up to 18 vocal variables across 4 vocalization types as well as 9 biometric characters. Chilean versus White-rumped Swallow are a closely-related pair of valid, sympatric species, whose measured differentiation was compared to that between Magdalena and other swallows to assess their taxonomic rank. Vocal and morphological characters gave conflicting results. The rising calls of Magdalena Swallow are diagnosable in multidimensional space from White-winged Swallow, with slower pace, less change in frequency and overall lower frequency. Also, vocal repertoire differed, with 'buzz' calls predominating in Magdalena Swallow but 'rising' calls being more common in White-winged. Measured vocal differentiation exceeded that between Chilean and White-rumped Swallows and differences in repertoire were consistent. In contrast, Magdalena Swallow was non-diagnosably differentiated in plumage and biometrics from White-winged Swallow. Magdalena Swallows usually have a darker, navy-blue mantle (this usually being aquamarine or green-blue in White-winged Swallow but variable), and reduced white markings on the secondaries and wing coverts (which are typically extensive in White-winged Swallow but variable in both, with overlap). Biometrics largely overlap but Magdalena Swallows have an average shorter tarsus and bill. The molecular biology of Magdalena Swallow is unknown. Reported pairwise molecular differentiations between other species in the genus in previous published studies were tested for correlations against measured differentiation in all vocal and biometric variables. Magdalena Swallow achieved higher differentiation in vocal variables which correlated with molecular differentiation but low differentiation in biometric variables which also correlated with molecular differentiation, again a conflicting outcome. Considering differences in voice, plumage and biometrics, the Magdalena Swallow is here described as a new subspecies. The occurrence of dark-winged White-winged Swallows in western Colombia has led to dubious claims of both Mangrove Swallow and Bahama Swallow T. cyaneoviridis in this region, based on sight records. A 'Colombia' specimen of Mangrove Swallow was found in this study. Together with an intermediate specimen (showing a pale lore), there is evidence of occasional vagrancy of Mangrove Swallow to northern Colombia. There is some geographical variation in biometrics and plumage among Eastern populations of T. albiventer, but vocal differentiation is weak. The type locality of T. albiventer is in Cayenne, French Guyana, whilst western Amazonian birds were once named as aequatorialis due to their paler blue dorsal and more extensive white wing markings, but these variations are non-diagnostic. Populations of White-winged Swallow in the Atlantic and Cerrado regions of Brazil are taxonomically undescribed. These have a greenish mantle coloration (a rare morphotype in Amazonia) and often have a longer tail and white tail tips or remiges. Measured biometric and vocal differentiation of this population closely misses requirements for subspecies rank, but study of a larger sample of Brazilian specimens should be considered.

The judicialization of medicines in a Western Amazon State: a patient and state relationship

Introduction: during the process of becoming ill, users of the Unified Health System may need to access health technologies, including medication, to regain their health. Given the diversity of technologies used in health care and their constantly growing arsenal, it is difficult to make them viable for public health agencies. However, given the limitation of the public power in providing medication, the judicialization of medication materializes, since Brazilians, protected by the Federal Constitution of Brazil, are assured the right to health, established in Art. 196, as a right of all and a duty of the State, including pharmaceutical assistance. Objective: analyze the Unified Health System users’ access to medication, through the intervention of the Judiciary. Methods: this is a qualitative study conducted with two focus groups, divided into two consecutive days, in Rio Branco/Acre, in November 2017. Ten users of the Unified Health System who resorted to the Judiciary to obtain medication, five prescribing physicians working in the Unified Health System and three employees of the Judiciary participated, totaling a sample of eighteen participants. The users were randomly selected from among those patients existing in the State Department of Health of Acre judicialization database. The data obtained in the focus groups were treated according to the content analysis proposed by Bardin. Results: the majority of users demonstrate a clear perception of their constitutionally established right to access medication, regardless of the purchase price, although they feel of lesser value, since it is necessary to face an arduous battle until reaching the Judiciary. Prescribing physicians understand that some medications, in some situations, may be prescribed in disagreement with their indication/protocols/lists of the Unified Health System, in the search for the recovery of the citizen’s health. The employees of the Judiciary recognize the issue of the citizen’s constitutional right to health, refer to the difficulty of the State in enforcing health rights and the possible disorganization of management, including the inadequate management of public resources, and consider compliance with current health policies, although, in most cases, they tend to be favorable to the users demanding the medication. Conclusion: in the process of accessing necessary health treatments, Unified Health System users occasionally seek the prescribed medication, included (30%) or not (70%) in the Unified Health System protocols, from the state/municipal health management (health care networks), and, when denied, they resort to the Judiciary via the judicialization of health. Financial vulnerability of users, non-inclusion of medications requested in court in the Unified Health System medication lists, administrative denial of the medication and high financial cost of the medications were pointed out by users as determining factors for the judicialization of health. There is a clear perception of the fundamental right to prescribed medication, and that the judicial system is the decision-making and resolution body when they are denied access to necessary health treatments by the State’s administrative bodies.

Indicators in groundwater in a rural region of Igarapé-Açu Municipality, northeastern Pará State, western Amazon, Brazil

Indicators in groundwater in a rural region of Igarapé-Açu Municipality, northeastern Pará State, western Amazon, Brazil

Hematological profile and erythrocyte osmotic fragility of free-living yellow-footed tortoise Chelonoidis denticulatus (Linnaeus, 1766).

The yellow-footed tortoise (Chelonoidis denticulatus, Linnaeus, 1766) is among the most consumed chelonian species in the Amazon region, raising concerns about its conservation status. Furthermore, few studies have been carried out on the parameters of physiological normality of this species in free-living conditions, making it difficult to assess the impact of environmental changes on the physiology of the group. The erythrocyte osmotic fragility (EOF) test is a biomarker of environmental changes that cause membrane damage, decreasing erythrocyte resistance to osmotic stress. However, the physiology of the species is still poorly understood, and the reference ranges for hematological parameters and EOF is unknown for most species in natural conditions. Understanding the reference intervals of the physiological parameters of these animals have fundamental importance to assess when a population is under the effect of environmental stressors, such as xenobiotics, as well as to provide comparative parameters in clinical analyzes for the species. The lack of information on normal EOF values ​​makes it difficult to assess the effects of environmental and clinical changes on the physiology of the species. This study aimed to establish reference intervals for hematological parameters and EOF analysis for C. denticulatus, using thirty tortoises (n = 15 males and n = 15 females). The t-test and Mann-Whitney test were used to compare the hematological parameters between sexes, while the Kruskal-Wallis test was used in the EOF analysis, and the reference range was calculated for males and females together. No statistical differences were found in hematological values between sexes, nor in the hemolysis profile in the EOF analysis, demonstrating that in this population, these parameters of C. denticulatus are similar between sexes during the sampling period. According to the results of this study, we can consider the erythrocytes of these animals osmotically resistant, reflecting the stability of the cell membrane. This study reports for the first time hematological values and EOF analysis for the species C. denticulatus in the wild in a region of the far western Brazilian Amazon.

New record of Youngomyia pouteriae Maia, 2001 (Diptera, Cecidomyiidae) in Pouteria caimito (Ruiz & Pav.) Radlk. (Sapotaceae) in the Peruvian Amazon

We report for the first time cylindrical galls of Youngomyia pouteriae Maia, 2001 (Diptera, Cecidomyiidae) on Pouteria caimito (Ruiz & Pav.) Radlk. (Sapotaceae) in Peru. Youngomyia pouteriae were exclusively found in the Atlantic Forest biome, in restinga areas of Rio de Janeiro state, Brazil. In this study, the geographic distribution of this galling species is extended to the western Amazon lowland rainforest in Peru.

The role of climate on the emergence of giant caimanines (Crocodylia, Alligatoroidea) from the Miocene western Amazonian region

Extant caimanines include the six modern species of caimans, which occur predominantly in South and Central America and are mostly medium-sized crocodylians. Nevertheless, the fossil record of the group reveals a significantly higher diversity, with remarkable body size variation. In particular, the giants Purussaurus and Mourasuchus, from the Miocene western Amazonian region, are two of the most prominent representatives. Previous work has demonstrated a correlation between the body size of crocodylians and abiotic factors throughout the Cenozoic; however, this relationship is poorly understood, particularly within the Caimaninae lineage. Here, we explore evolutionary body size patterns within Caimaninae, investigating the potential influence of climatic factors. Using a phylogenetically-informed method, we estimated the body size of 33 caimanine specimens, coupled with climatic variables from a General Circulation Model to reconstruct deep-time patterns. Our results indicate that giant Miocene caimanines are restricted to warmer conditions, with significantly less seasonal temperature variation. This suggests that the unmatching climatic conditions of the Miocene western Amazonian region possibly allowed the emergence of unique palaeoecosystems, favouring the sustenance of these very large crocodylians.

Increased Occurrence of Large‐Scale Windthrows Across the Amazon Basin

AbstractConvective storms with strong downdrafts create windthrows: snapped and uprooted trees that locally alter the structure, composition, and carbon balance of forests. Comparing Landsat imagery from subsequent years, we documented temporal and spatial variation in the occurrence of large (≥30 ha) windthrows across the Amazon basin from 1985 to 2020. Over 33 individual years, we detected 3179 large windthrows. Windthrow density was greatest in the central and western Amazon regions, with ∼33% of all events occurring in ∼3% of the monitored area. Return intervals for large windthrows in the same location of these “hotspot” regions are centuries to millennia, while over the rest of the Amazon they are >10,000 years. Our data demonstrate a nearly 4‐fold increase in windthrow number and affected area between 1985 (78 windthrows and 6,900 ha) and 2020 (264 events and 32,170 ha), with more events of >500 ha size since 1990. Such extremely large events (>500 ha up to 2,543 ha) are responsible for interannual variation in the overall median (84 ± 5.2 ha; ±95% CI) and mean (147 ± 13 ha) windthrow area, but we did not find significant temporal trends in the size distribution of windthrows with time. Our results document increased damage from convective storms over the past 40 years in the Amazon, filling a gap in temporal records for tropical regions. Our publicly accessible large windthrow database provides a valuable tool for exploring dynamic conditions leading to damaging storms and their ecological impact on Amazon forests.

Non-destructive and rapid identification of yeasts by nearinfrared spectroscopy and machine learning

This study aimed to apply near-infrared (NIR) spectroscopy combined with machine learning techniques to identify yeast strains rapidly and practically, comparing the results with traditional molecular identification methods. Yeasts were isolated from the digestive tracts of aquatic mining insects collected in the extreme north of the Western Amazon (Roraima), Brazil, and preserved through cryopreservation and mineral oil methods. Molecular identification involved PCR amplification and sequencing of ribosomal DNA regions. NIR spectroscopy, coupled with multivariate analysis and machine learning algorithms such as principal component analysis (PCA), hierarchical cluster analysis (HCA), k-nearest neighbor (KNN), and soft independent modeling by class analogy (SIMCA), was used to analyze and classify the yeast samples, accurately identified yeast strains at the genus and species levels, achieving 100% accuracy in both the calibration and validation sets. The results indicate that this method provides a rapid, non-destructive, and environmentally friendly alternative to traditional molecular techniques, making it suitable for real-time, in situ analysis with minimal sample manipulation.

Continued Breastfeeding in a Birth Cohort in the Western Amazon of Brazil: Risk of Interruption and Associated Factors

Background: Continued breastfeeding reduces infant mortality and provides nutritional, immunological, and developmental benefits for the child. Objectives: A prospective cohort study conducted in 2015 followed 608 children who were breastfed between 6 and 24 months. The study assessed the risk of breastfeeding interruption at 12, 18, and 24 months, as well as the factors associated with this outcome, in a cohort of newborns in Rio Branco, using the life table method. Methods: The factors associated with breastfeeding cessation and their 95% confidence intervals (CI95%) were analyzed using both crude and adjusted Cox proportional hazards regression in a hierarchical model. The risks of breastfeeding cessation at 12, 18, and 24 months were 19%, 65%, and 71%, respectively. Results: Factors positively associated with the risk of breastfeeding cessation include the use of a pacifier before 6 weeks of age (HR = 1.62; CI: 95% 1.24–2.11) and the use of a bottle during the first year of life (HR = 1.41; CI: 95% 1.11–1.78). Maternal return to work after the birth of the baby (HR = 0.78; CI: 95% 0.62–0.97) was found to be negatively associated with the risk of breastfeeding interruption. Conclusions: Early pacifier use before 6 weeks and the introduction of a bottle in the first year affect continued breastfeeding. Maternal employment was associated with reduced risk of breastfeeding cessation, contrary to most studies.

Genetic Variability in the Physicochemical Characteristics of Cultivated Coffea canephora Genotypes.

The objective of this study was to characterize the genetic divergence and selection gains of the physicochemical grains traits of 68 genotypes of C. canephora most cultivated in the Western Amazon. For this purpose, the following characteristics were evaluated over two harvests: aqueous extract, ash, acidity, pH, protein, ether extract, soluble solids, phenolic compounds, soluble sugars, reducing sugars, and non-reducing sugars. The genotype × measurement interaction effect was significant for all characteristics, with a predominant simple interaction, resulting in smaller changes in the ranking of genotypes. Out of a total of 45 genotypic correlation estimates, 8 were significant, of which 5 were related to acidity. The dispersion of the first two components associated with reference points shows that the genotypes BRS3193, AS1, AS2, AS3, N16, CA1, and AS7 were closest to the ideal type of higher performance. Selection for the main characteristic of soluble sugars resulted in estimates of genetic progress lower than those observed using selection indices. The genetic materials present high genetic diversity, allowing the selection of reference plants with high levels of sugars (BRS3193, AS3, GJ25, and LB30), proteins (BRS2357), lipids (GJ30), and phenolic compounds in their green beans (BRS3193) and high water solubility (AS2).