Genetic diversity in maize under nitrogen restriction conditions

Santos, Weder Ferreira dos; Afférri, Flávio Sérgio; Pelúzio, Joênes Mucci; Sodré, Layanni Ferreira; Rotili, Eliane Aparecida; Cerqueira, Fernando Barnabé; Ferreira, Talita Pereira de Souza

doi:10.18067/jbfs.v5i2.190

Cited by 7 publications

(15 citation statements)

References 9 publications

(13 reference statements)

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“…And genetic divergence also [1,5,[17][18][19], however, there are few studies developed in the northern region of the country, more specifically in the Cerrado-Amazon transitional zone. In view of the above, the present work aims to study the agronomic performance and genetic divergence in maize in the Cerrado-Amazon Ecotone.…”

Section: Introductionmentioning

confidence: 99%

Agronomic Performance and Genetic Divergence in Corn (Zea mays) in the Cerrado-Amazon Ecotone

Silva¹,

Santos

Andrade

et al. 2019

IJPSS

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The objective of this work is to study the agronomic performance and genetic divergence in corn in the Cerrado-Amazon ecotone. The trials were conducted in the 2017/18 harvest at a property in the state of Pará. The experimental design was a randomized block with nine treatments and three replications, where the treatments are represented by nine cultivars of corn. The characteristics to evaluate agronomic performance and genetic divergence were: ear height (cm), plant height (cm), ear length (cm), ear diameter (mm), number of rows, number of grains per row and grain yield (kg ha−1). The cultivars were separated into a multivariate model in five groups using the Tocher optimization method. The cultivar AG 1051 showed the best agronomic performance. The results of genetic divergence were according to the generalized distance of Mahalanobis (D2), with the commences AG 8088 x CATIVERDE and AG 1051 x AL BANDEIRANTE, the most promising for future crosses.

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Section: Introductionmentioning

confidence: 99%

Agronomic Performance and Genetic Divergence in Corn (Zea mays) in the Cerrado-Amazon Ecotone

Silva¹,

Santos

Andrade

et al. 2019

IJPSS

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“…Genetic dissimilarity measurements, estimated from Mahalanobis distance, at each dose of P (Table 3), showed a high magnitude (9.72 a 1484.87), indicating the presence of genetic variability among genotypes. Similar approach was adopted by Jumaa and Madab [20], Santos et al [24], Coelho et al [25], Silva et al [17] and Silva et al [18]. The analysis of genetic distance can help in the choice of parents for future crossings, enabling time savings, labor and financial resources in future studies [17,18].…”

Section: Resultsmentioning

confidence: 99%

Genetic Divergence in Corn Genotypes for High and Low Phosphorus in Pará, Brazil

Santos

Maciel

Júnior

et al. 2020

ARRB

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Aims: The objective of this study was to estimate the genetic divergence between ten corn genotypes in the 2017/18 crop, under high and low phosphorus. Study Design: The experimental design used in each test was randomized blocks, the treatments were: ten genotypes in two levels of phosphorus and three replications. Place and Duration of Study: Sítio Vitória, municipality of Santa Maria das Barreiras, state of Pará, Brazil, in the 2017/18 crop. Methodology: The experimental plot consisted of four lines five meters long, spaced with 0.90 m between the lines, with approximately 55,000 plants per hectare in the harvest. The genotypes used: 2B655, AG 1051, AG 8088, AL BANDEIRANTE, ANHEMBI, BR 206, BRS 3046, CATIVERDE, ORION e PR 27D28. The following agronomic characteristics were evaluated: plant height, ear height, ear diameter, ear length, number of grains per row, yield per plant and grain yield. Genetic divergence was estimated from Mahalanobis distances and genotypes were grouped by Tocher optimization methods. Results: Genetic dissimilarity measurements, at each dose of phosphorus, showed a high magnitude (D2= 9.72 to 1484.87). Cluster analysis separated the genotypes into four groups at low phosphorus and two groups at high phosphorus. The characteristics that most contributed to genetic divergence, in the two levels of phosphorus, were yield per plant and grain yield. Conclusion: There was a higher genetic divergence between genotypes AG 1051 and BANDEIRANTE in the low phosphorus assay and between the genotypes ANHEMBI and AL BANDEIRANTE in the high phosphorus assay. With this, these crosses are promising to obtain lineages in both tests.

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“…Several researchers have sought to obtain genotypes with higher EUN for corn ( [12], [13], [14], [15], [16], [17]. However, there are few studies involving corn genotypes, responsive and efficient to nitrogen use, after inoculation of seeds with Azospirillum brasilense, as well as comparations involving EUN in cultivars with seeds inoculated and not inoculated with Azospirillum.…”

Section: Introductionmentioning

confidence: 99%

Efficiency and response of corn cultivars to nitrogen, associated or not with Azospirillum brasilense

Dias¹,

Pelúzio²,

Afférri³

et al. 2021

IJAERS

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Green corn is an economic and social alternative for small and medium-sized farmers. However, the high cost of the insums, especially in relation to the use of nitrogen, has advanced studies with nitrogen-fixing bacteria. This study evaluated commercial maize cultivars for the production of green ears, responsive and efficient to nitrogen use, with and without application in Azospirillum brasilense seeds. Two trials were installed in the agricultural years 2019/20 and 2020/21 in soweds carried out on 12/04/2019 and 10/12/2020 in this order, at the Federal University of Tocantins, Palmas-TO. In each trial, the experimental design was randomized blocks, with three replications, being the treatments arranged in subdivided plots, where the treatments involving the processes with inoculation of seeds with the bacterium Azospirillum (C Az) and without inoculation of seeds (S Az) were allocated in the plots, two doses of nitrogen (30 and 120 kg ha-1 N, considered as low and high N, respectively) and in the subplots eight corn cultivars were allocated in the subplots. Joint variance analysis was performed for each of the seed inoculation processes (C Az and S Az) and then the efficiency and response of corn cultivars were studied for the use of N for each process. The inoculation of seeds with the bacterium promoted changes in the efficiency and response of cultivars regarding the use of nitrogen. The cultivar BRS-3046 was the most important for the cultivation of green ears, since it was efficient and responsive to the use of nitrogen with Azospirillum brasilense.

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Genetic diversity in maize under nitrogen restriction conditions

Cited by 7 publications

References 9 publications

Agronomic Performance and Genetic Divergence in Corn (Zea mays) in the Cerrado-Amazon Ecotone

Agronomic Performance and Genetic Divergence in Corn (Zea mays) in the Cerrado-Amazon Ecotone

Genetic Divergence in Corn Genotypes for High and Low Phosphorus in Pará, Brazil

Efficiency and response of corn cultivars to nitrogen, associated or not with Azospirillum brasilense

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