Análise dialélica de linhagens de milho quanto à responsividade ao fósforo e à sua eficiência de uso

Meirelles, W. F.; Parentoni, S. N.; Guimarães, L. J. M.; Guimarães, P. E. de O.; Pacheco, C. A. P.; Oliveira, Antônio Carlos de; Mendes, F. F.; Scapim, Carlos Alberto

doi:10.1590/s0100-204x2016000300004

Cited by 6 publications

(6 citation statements)

References 16 publications

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“…The mean yields found by [9] for forty-two genotypes, and [10] for thirty-six other genotypes, were 3,941 and 6,125 kg ha -1 in low P, and 8,867 and 8,671 kg ha -1 in high P. These values are lower than the means of cultivars in this study. This may be due to the lower doses used by these authors.…”

Section: Resultscontrasting

confidence: 74%

“…Subsequently, they acquire a reddish-purplish color (anthocyanin accumulation) at the tips and margins of the leaf blade, which may extend to the culm. The plant also shows reduced growth [5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…And as the raw material for the manufacture of these fertilizers is finite, it is necessary to search for cultivars with efficient use and responsive application of phosphorus. Within this context, several researchers have sought to obtain these cultivars with greater efficiency and use of P for the cultivation of corn [4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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Efficiency and Response to Phosphorus Use of Corn Cultivars in the Tropical Climate

Santos

Maciel

Ferreira

et al. 2021

IJPSS

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Aims: The present study evaluated the efficiency and response to phosphorus (P) use of corn cultivars in the tropical climate in southern Para State, Brazil. Study Design: Two experiments were carried out, in low P (50 kg ha-1) and high P (200 kg ha-1) applications in Randomized block design (RBD), three replicates, and fourteen cultivars were used for the experiment. Place and Duration of Study: The experiment was carried out in the 2019-20 harvest at Sitio Vitoria (8º18'32" S, 50º36'58" W), located in the municipality of Santa Maria das Barreiras, a southern region of Para state, Brazil. Methodology: Phosphate fertilization was used in the sowing groove. In low P, 50 kg ha-1 of P2O5 were applied, and in high P were 200 kg ha-1 of P2O5. The source was simple superphosphate (18% P2O5). The dose in high P was defined to achieve high yields and considering the nutrient content in the soil, in low P the dose was well below. Nitrogen and potassium fertilization in cover were divided: 50% in V4 and 50% in V8. Doses of 150 kg ha-1 of N and 90 kg ha-1 of K2O were used, and fertilizers were used: urea (43% N) and potassium chloride (60% K2O). Results: The highest means were: 8,710 kg ha-1 efficiency and 29.78 kg kg-1 response. The efficient cultivars were: ORION, BR 2022, CR 120, AL BANDEIRANTE, M 274, BRS 3046, and AG 8088. And those considered responsive were: BM 3061, BR206, CATIVERDE 02, BR 205, ANHEMBI, BR 2022, and BRS 3046. Conclusion: The cultivar BR 2022 and BRS3046 showed high efficiency and also a response to phosphorus use.

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Section: Resultscontrasting

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Efficiency and Response to Phosphorus Use of Corn Cultivars in the Tropical Climate

Santos

Maciel

Ferreira

et al. 2021

IJPSS

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“…The mean grain yields found by Meirelles et al [40] for forty-two genotypes in two harvests and Colombo et al [41] for thirty-six other genotypes were 3,941 and 6,125 kg ha -1 for low P, and 8,867 and 8,671 kg ha -1 for high P. Values lower than those found in this study.…”

Section: Resultscontrasting

confidence: 72%

Agronomic Performance of Corn Cultivars as a Function of Phosphorus Use

Maciel

Santos

Pelúzio

et al. 2020

ARRB

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Aims: The research was carried out to evaluate the agronomic performance of corn cultivars in contrasting phosphorus environments in the state of Pará, Brazil. Study Design: The experimental design was randomized blocks with ten treatments and three replications. The treatments were composed of ten cultivars: AG 1051, AG 8088PRO2, BR 206, BRS 3046, PR 27D28, 2B655PW, AL BANDEIRANTE, ANHEMBI, CATIVERDE 02 and ORION Place and Duration of Study: In the 2017/18 crop, two competition trials of corn cultivars were carried out at Sítio Vitória, municipality of Santa Maria das Barreiras, state Pará, Brazil. Methodology: Two competition trials of corn (Zea mays L.) cultivars were carried out under contracting conditions of phosphorus: high P (100 kg ha-1 of P2O5) and low P (50 kg ha-1 of P2O5), using simple superphosphate (18% P2O5) as the source. The agronomic efficiency of phosphorus use was obtained by the difference between grain yield in both levels, divided by the difference between doses. The variables evaluated were: ear height, plant height, ear diameter, number of rows per year, number of grains per rows and grain yield. Results: The mean grain yield of the cultivars ranged from 5,446 kg ha-1 (low P) to 11,486 kg ha-1 (high P), and the means of all cultivars were higher in high P. The means agronomic efficiency ranged from 25.1 kg kg-1 (AL BANDEIRANTE) to 96.6 kg kg-1 (AG 1051). Conclusion: The highest phosphorus dose (100 kg ha-1 of P2O5) resulted in higher values in the variables studied. The cultivars that stood out the most, under high and low phosphorus, were AG 8088PRO2, AG 1051 and BRS 3046, the last two being agronomically efficient.

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“…Traits related to tissue P content (root and shoot) presented the lowest heritability at both P levels, as in the study developed by Van de Wiel et al (2016) under conditions of P stress, in which heritability was generally low. Furthermore, Fritsche- Neto et al (2010) and Meirelles et al (2016) reported that the experimental accuracy at the P-restricted environment was lower for most traits assessed in maize. The analytical measurement of P content in SPC and RPC was carried out by chemical protocols, being more complex the measurement in RPC since it is more susceptible to contamination with P present in soil remnants in the root.…”

Section: Discussionmentioning

confidence: 99%

Contrasting Phosphorus Environments as Indicators for Popcorn Breeding Lines

Silva¹,

Júnior²,

Filho³

et al. 2019

FPBJ

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Phosphorus (P) is one of the most limiting factors in low investment agricultural systems. The aim of this study was to evaluate a panel of 29 popcorn maize lines to identify potential genotypes to be developed under P restriction conditions for integration into a breeding program. For this, these lines were phenotyped for complex traits of the shoot, root, and phosphorus use efficiency (PUE) at contrasting and controlled P environments (standard and low P contents of 22 and 4 mg dm −3 , respectively) and genotyped with 15 SSR-EST markers. The results indicated that through selection in shoot traits it is possible to obtain indirect gains in traits related to root development that are difficult to measure. In addition, the selection based on traits of shoot and root development at an environment promotes indirect gains in another environment. In the environment supplied with low P, the P uptake were more important for PUE than internal utilization of P. Lines P2, P4, P7, and P9 presented a better development of shoot and root system at the Plow environment, in addition to showing P content above the average in root and shoot. Based on genetic diversity, complementary and inheritance crosses were identified.

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Análise dialélica de linhagens de milho quanto à responsividade ao fósforo e à sua eficiência de uso

Cited by 6 publications

References 16 publications

Efficiency and Response to Phosphorus Use of Corn Cultivars in the Tropical Climate

Efficiency and Response to Phosphorus Use of Corn Cultivars in the Tropical Climate

Agronomic Performance of Corn Cultivars as a Function of Phosphorus Use

Contrasting Phosphorus Environments as Indicators for Popcorn Breeding Lines

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