Divergência genética de feijão-caupi (Vigna unguiculata) no sul do Tocantins

Sousa, Sérgio Alves de; Tavares, Taynar Coelho de Oliveira; Barros, Hélio Bandeira; Nascimento, Ildon Rodrigues do; Santos, Vanessa Batista dos; Fidélis, Rodrigo Ribeiro

doi:10.19084/rca16069

Cited by 4 publications

(13 citation statements)

References 16 publications

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“…The values found here were higher than the averages reported by Sousa et al (2017), who obtained values from 5.93 to 14 for pods per plant and 12.51 to 14.56 for grains per pod, in a study with genotypes and lines of cowpea.…”

Section: Resultscontrasting

confidence: 87%

“…Despite the importance, cowpea has its genetic potential underexplored in the state, given that genotypes that are either traditional or from breeding programs conducted in other regions, with different soil and climatic conditions, are used in most plantations, and its cultivation is carried out mostly by small farmers with little technical knowledge and little knowledge of the environment, as well as limited economic power (Silva et al, 2014;Sousa et al, 2017;Silva et al, 2018).…”

Section: _______________________________________________mentioning

confidence: 99%

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Genetic diversity and importance of agronomic traits in cowpea genotypes in conditions of low technological level in Piaui

Santos,

Leite,

Sousa

et al. 2023

Rev. Ceres

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Section: Resultscontrasting

confidence: 87%

Section: _______________________________________________mentioning

confidence: 99%

Genetic diversity and importance of agronomic traits in cowpea genotypes in conditions of low technological level in Piaui

Santos,

Leite,

Sousa

et al. 2023

Rev. Ceres

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“…Kappa indexes higher than 0.75 validated the supervised classifications, with accuracy above 96% for all classes, and excellent concordance for the forest class 27 . The low confusion between pasture and exposed soil is related to the similarities of the spectral responses that these classes have with each other 28 .…”

Section: Discussionmentioning

confidence: 76%

Geotechnology in the analysis of forest fragments in northern Mato Grosso, Brazil

Barbosa

Spletozer

Roque

et al. 2018

Sci Rep

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Pasture implantation fragments and reduces the Amazonian forest area. The objective was to quantify landscape changes in 1985, 2000 and 2015 in northern Mato Grosso, Brazil. The study was carried out in three scenes obtained by the LANDSAT satellite of a microbasin (2742.33 ha) in the municipality of Alta Floresta. Forest, water bodies, pasture and exposed soil were the thematic classes determined to e mapping the land use evolution. The edge, density and shape indexes of the fragments were measured. Normalized vegetation difference (NDVI) values were high in 1985. Land use and occupation over 15 years (1985–2000) reduced forest cover by 69.8%, but it increased by 1.7% over the next 15 years (2000–2015). The number of exposed soil patches increased between the periods, but the total area and number of the patches of the forest fragments decreased. The high values of NDVI in 1985 showed vegetated areas with high density. Reducing forest cover decreases the size of the fragments, increases the isolation and the number of soil patches exposed. The mapping of land use showed a reduction of the Amazon forest in the microbasin in the north of Mato Grosso, in the years 2000 and 2015 compared to 1985.

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“…Genetic divergence among 30 cowpea genotypes were observed based on the formation of three different groups by the Tocher's optimization method (SANTANA et al, 2019). Dissimilar genotypes from different groups are recommended for selection in order to generate promising populations (SOUSA et al, 2017). Thus, a greater potential for selection should be attributed to genotypes 986, 244, 1002, 165, 02, 172, 151, and 189 in order to develop cowpea cultivars aimed at green-grain production.…”

Section: Groupsmentioning

confidence: 99%

“…Several studies have been performed on the genetic divergence of cowpea aiming at genotype selection. Barroso Neto et al (2017), Santana et al (2019) and Sousa et al (2017) assessed the genetic divergence of cowpea genotypes and suggested combinations to obtain promising populations. The present study aimed to identify phenotypically divergent genotypes of V. unguiculata, from this perspective concerning agronomic and physiological variables aiming at green grain production.…”

Section: Introductionmentioning

confidence: 99%

Prospection of cowpea genotypes for green-grain production

Pessoa

Bertini

Costa

et al. 2022

RCA

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Cowpea is a nutritious species cultivated worldwide whose high genetic variability can be exploited in breeding programs. The present study aimed to identify phenotypically divergent genotypes of Vigna unguiculata (L.) Walp., from this perspective concerning agronomic and physiological variables aiming at green grain production. An experiment was conducted in Fortaleza -CE, to analyse 13 variables in 44 genotypes from the Active Germplasm Bank of the Federal University of Ceará. The experiment was set up in an augmented block design with four additional controls (commercial cultivars). The genetic and environmental variance components were estimated by restricted maximum likelihood, after which the intraclass correlation coeffi cient (ICC) was calculated. Principal components analysis, Tocher's clustering and correlation analysis were used in the study. The variables most infl uenced by genetic variance were production per plant, green pod length, green grain length, grain mass per pod, and total yield, with ICC > 0.5. Principal components analysis signalled the physiological variables gs, ci, and ci.ca and the agronomic variables of green pod length, green grain mass, number of grains per pod, and earliness of production as important for differentiating between cowpea genotypes. CE genotypes 02, 151, 165, 172, 189, 244, 986, and 1002 show genetic variability, and their use is recommended in cowpea breeding programs aimed at green-grain production.

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Divergência genética de feijão-caupi (Vigna unguiculata) no sul do Tocantins

Cited by 4 publications

References 16 publications

Genetic diversity and importance of agronomic traits in cowpea genotypes in conditions of low technological level in Piaui

Genetic diversity and importance of agronomic traits in cowpea genotypes in conditions of low technological level in Piaui

Geotechnology in the analysis of forest fragments in northern Mato Grosso, Brazil

Prospection of cowpea genotypes for green-grain production

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