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Agronomic responses of grapevine ‘Chenin Blanc’ as a function of training systems and rootstocks 63
Leão,Patrícia Coelho de Souza; Chaves,Agnaldo Rodrigues de Melo.
ABSTRACT The aim of this research was to study the influence of training system and rootstock on the yield, vigor and physiology of the ‘Chenin Blanc’ grapevine at São Francisco Valley, northeastern Brazil. An experiment was carried out on eight harvests, from 2013 to 2017, in Petrolina, in the state of Pernambuco. Grapevines were grown under two training systems, lyre and espalier, and five rootstocks: ‘IAC 572’, ‘IAC 313’, ‘IAC 766’, ‘Paulsen 1103’ and ‘SO4’, using a split-plot randomized block design, with training systems assigned to the main plot and the rootstock assigned to the subplot. Lyre favored an increase in the number of bunches, branches and leaf mass in the harvest of the first semester of the year, while in the second semester there were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vitis vinifera; Tropical viticulture; Yield; Vigor.
Ano: 2021 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000100601
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Genetic parameters for drought-tolerance in cassava 86
Oliveira,Eder Jorge de; Aidar,Saulo de Tarso; Morgante,Carolina Viana; Chaves,Agnaldo Rodrigues de Melo; Cruz,Jailson Lopez; Coelho Filho,Maurício Antônio.
The objective of this work was to evaluate the effect of drought on genetic parameters and breeding values of cassava. The experiments were carried out in a completely randomized block design with three replicates, under field conditions with (WD) or without (FI) water deficit. Yield of storage roots (RoY), shoot (ShY), and starch (StY), as well as the number of roots (NR), and root dry matter content (DMC) were evaluated in 47 cassava accessions. Significant differences were observed among accessions; according to heritability, these differences had mostly a genetic nature. Heritability estimates for genotypic effects () ranged from 0.25±0.12 (NR) to 0.60±0.18 (DMC), and from 0.51±0.17 (NR) to 0.80±0.21 (RoY and StY) for WD and FI, respectively, as a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Manihot esculenta; Breeding; Drought stress; Germplasm..
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015000300233
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Productive and morphogenetic responses of buffel grass at different air temperatures and CO2 concentrations 96
Santos,Roberta Machado; Voltolini,Tadeu Vinhas; Angelotti,Francislene; Aidar,Saulo de Tarso; Chaves,Agnaldo Rodrigues de Melo.
The objective of the present trial was to evaluate the productive and morphogenetic characteristics of buffel grass subjected to different air temperatures and CO2 concentrations. Three cultivars of buffel grass (Biloela, Aridus and West Australian) were compared. Cultivars were grown in growth chambers at three temperatures (day/night): 26/20, 29/23, and 32/26 °C, combined with two concentrations of CO2: 370 and 550 µmol mol-1. The experimental design was completely randomized, in a 3 × 3 × 2 factorial arrangement with three replications. There were interactions between buffel grass cultivars and air temperatures on leaf elongation rate (LER), leaf appearance rate (LAR), leaf lifespan (LL) and senescence rate (SR), whereas cultivars vs. carbon dioxide...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carbon dioxide; Cenchrus ciliaris; Climate change.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000800404
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Training systems and rootstocks on yield and agronomic performance of ‘Syrah’ grapevine in the Brazilian semiarid 64
Leão,Patrícia Coelho de Souza; Chaves,Agnaldo Rodrigues de Melo.
ABSTRACT The Vale do São Francisco stands out among the main Brazilian wine regions, and ‘Syrah’ is a grape cultivar very important to produce red wines. The objective of this study was to evaluate the influence of training systems and rootstocks on the yield and other agronomic variables of ‘Syrah’ grapevines during eight consecutive harvests in the tropical semiarid environment in the Vale do São Francisco. An experiment was carried out in Petrolina, state of Pernambuco, with ‘Syrah’ trained to lyre and espalier systems and grafted on IAC 572, IAC 766, IAC 313, SO4, 1103 Paulsen and Harmony rootstocks. A randomized block design with four replicates and split plots was used. There was a significant interaction between the training system and rootstock for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Winegrape; Tropical viticulture; Vitis vinifera..
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100219
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