scholarly journals Calibration and validation of a node appearance model in soybean crop

2021 ◽  
Vol 25 (6) ◽  
pp. 361-371
Author(s):  
Kelin P. Bexaira ◽  
Nereu A. Streck ◽  
Alencar J. Zanon ◽  
Eduardo L. Tagliapietra ◽  
Gean L. Richter ◽  
...  
Keyword(s):  
Maximum Rate ◽  
Appearance Model ◽  
Southern Brazil ◽  
Maturity Group ◽  
Temperature Function ◽  
Calibration And Validation ◽  
Soybean Crop ◽  
Soybean Cultivars ◽  
Appearance Rate ◽  
Maximum Temperatures

HIGHLIGHTS Improvement of the simulation by calculating a temperature function with the daily minimum and maximum temperatures. Equation to determine the maximum rate of node appearance of soybean cultivars recommended for Southern Brazil. Maximum node appearance rate varies with the maturity group and not with the type of growth of soybean cultivars.

Assessment of MODIS LAI retrievals over soybean crop in Southern Brazil

2006 ◽  
Vol 27 (19) ◽  
pp. 4091-4100 ◽  
Author(s):  
R. Rizzi ◽  
B. F. T. Rudorff ◽  
Y. E. Shimabukuro ◽  
P. C. Doraiswamy
Keyword(s):  
Southern Brazil ◽  
Soybean Crop ◽  
Modis Lai

scholarly journals Genetic variation and environmental effects on beta-conglycinin and glycinin content in Brazilian soybean cultivars

2008 ◽  
Vol 43 (9) ◽  
pp. 1105-1114 ◽  
Author(s):  
Mercedes Concórdia Carrão-Panizzi ◽  
Prachuab Kwanyuen ◽  
Sevim Zeynep Erhan ◽  
Ivani de Oliveira Negrão Lopes
Keyword(s):  
Genetic Variation ◽  
Protein Content ◽  
Environmental Effects ◽  
Protein Fraction ◽  
Protein Fractions ◽  
Southern Brazil ◽  
Individual Protein ◽  
Central Brazil ◽  
Soybean Cultivars ◽  
Good Possibility

The objective of this work was to determine genetic and environmental effects on beta-conglycinin and glycinin content in Brazilian soybean cultivars. The concentrations of these protein fractions were analyzed by scanning densitometry after electrophoresis, in 90 Brazilian soybean cultivars sown in Ponta Grossa, PR, in 2001. The effects of the sowing location were determined in the cultivar MG/BR 46 (Conquista), sown in 16 locations of Goiás and Minas Gerais states (Central Brazil), and in the cultivar IAS 5, sown in 12 locations of Paraná and São Paulo states (Southern Brazil), in 2002 soybean season. A significant variability for beta-conglycinin (7S) and glycinin (11S) protein fractions ratio was observed among the 90 Brazilian soybean cultivars. 'MS/BRS 169' (Bacuri) and 'BR-8' (Pelotas) presented the highest and the lowest 11S/7S ratios (2.76 and 1.17, respectively). Beta-conglycinin protein fractions presented more variability than glycinin protein fractions. Grouping test classified 7S proteins in seven groups, 11S proteins in four groups, and protein fraction ratios (11S/7S) in nine groups. Significant effect of sowing locations was also observed on protein fractions contents. There is a good possibility of breeding for individual protein fractions, and their subunits, without affecting protein content.

scholarly journals Effects of maturity group and stem growth habit on the branching plasticity of soybean cultivars grown at various planting densities

2020 ◽  
Vol 23 (4) ◽  
pp. 385-396
Author(s):  
Taiki Yoshihira ◽  
Song Liang ◽  
Haruka Suzuki ◽  
Takuya Kitabatake ◽  
Tatsuhiko Shiraiwa
Keyword(s):  
Growth Habit ◽  
Stem Growth ◽  
Maturity Group ◽  
Soybean Cultivars

Within-field variability and spatial analysis of white mould and soybean crop attributes in southern Brazil

2019 ◽  
Vol 44 (1) ◽  
pp. 104-111 ◽  
Author(s):  
Carlos R. Wutzki ◽  
Ayrton Berger-Neto ◽  
Edilaine M. Grabicoski ◽  
Luciane Henneberg ◽  
Felipe F. Sartori ◽  
...  
Keyword(s):  
Spatial Analysis ◽  
Southern Brazil ◽  
Soybean Crop ◽  
White Mould ◽  
Field Variability

scholarly journals Methods of Soybean Genotypes Selection in Paraná State, Brazil

2019 ◽  
Vol 11 (2) ◽  
pp. 100
Author(s):  
Lorena M. Lara ◽  
Michel Esper Neto ◽  
Hugo Zeni Neto ◽  
Alessandro L. Braccini ◽  
Fernanda B. G. Anghinoni ◽  
...  
Keyword(s):  
Correlation Coefficients ◽  
Growing Season ◽  
Northern Region ◽  
Regression Method ◽  
Segmented Regression ◽  
Genetic Characteristics ◽  
Soybean Crop ◽  
Soybean Cultivars ◽  
Soybean Genotypes ◽  
Weight Number

The soybean crop presents several cultivars available. The performance of each cultivar in the field is associated with its genetic characteristics and the interaction of these with environment. Specific recommendations according to environment are made soybean cultivars release based on adaptability and stability analyzes. This research evaluated twelve soybean cultivars in the northern region of Paraná State Brazil, in order to recommend the most suitable and stable cultivar. The experiment was designed in complete randomized blocks four sites: Maringá, Floresta, Cambé and Apucarana, with four replications, in 2017/2018 growing season. Totaling 48 experimental units per site, that is, a total of 192 in the experiment. The variables evaluated were: one thousand grain mass, productivity, hectoliter weight, number of pods per plant and number of grains per plant. The cultivars were evaluated for adaptability and stability by the methodologies proposed by Lin and Binns (1988) and a bi-segmented regression method according to Cruz et al. (1989). The results indicated that the selection was more reliable when the two methodologies were used, due to their correlation coefficients. Soybean cultivar 3 presented promising behavior in regions studied.

scholarly journals Farklı Olgunlaşma Grubuna Giren Soya Çeşitlerinin Niğde Koşullarında Verim ve Kalite Özelliklerinin Belirlenmesi

2017 ◽  
Vol 5 (11) ◽  
pp. 1446
Author(s):  
Sevgi Çalışkan ◽  
Ramazan İlhan Aytekin
Keyword(s):  
Seed Yield ◽  
Crop Production ◽  
Field Experiments ◽  
Block Design ◽  
Quality Parameters ◽  
Central Anatolia ◽  
Maturity Group ◽  
Soybean Cultivars ◽  
Yield And Quality ◽  
Weight Protein

Yield and quality performances of 27 soybean cultivars were evaluated in two years field experiment between 2015 and 2016 at the Experimental Farm of Faculty of Agricultural Sciences and Technologies, Nigde Omer Halisdemir University, Nigde, located in the Central Anatolia Region. The field experiments were laid out in the randomized complete block design with three replications in each year. The main phenological stages of development such as time to emergence, flowering, time to pod formation and time to maturity were determined as calendar days. Plant height, the first pod height, numbers of branch, pod and seed per plant, number of seed per pod, 100-seed weight, protein content, oil content and seed yield per decar were determined as yield and quality parameters. The results of two-year study revealed that the soybean cultivars differed significantly for all characters studied under Nigde conditions. It was also observed that yield and quality performances of cultivars fluctuated in years. Average seed yield values of cultivars were ranged from 135.2 kg/da-1 (Inton-I. maturity group) to 295.8 kg/da-1 (Adasoy-IV maturity group) in 2015 and 2016. In two years mean, the cultivars Adasoy, Sa-88 and Nova were determined as the most promising genotypes for main crop production in Nigde conditions.

scholarly journals Insect damage and powdery mildew severity in soybean cultivars and lines

2004 ◽  
Vol 61 (6) ◽  
pp. 584-592 ◽  
Author(s):  
André Luiz Lourenção ◽  
Nelson Raimundo Braga ◽  
Manoel Albino Coelho de Miranda ◽  
Paulo César Reco ◽  
Giuliana Etore do Valle ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Good Yield ◽  
Production Costs ◽  
Stink Bug ◽  
Stink Bugs ◽  
Economic Injury Level ◽  
Maturity Group ◽  
Early Maturity ◽  
Soybean Cultivars ◽  
Growing Seasons

The use of soybean cultivars resistant to insects and diseases reduces the application of pesticides, decreasing production costs and promoting a sustainable agriculture. The damage of stink bugs and defoliators and the severity of powdery mildew (Microsphaera diffusa) in soybean of three maturity groups were evaluated under field conditions, at Tarumã and Ribeirão Preto, State of São Paulo, Brazil. Three experiments, one for each group, were carried out in the 1999/2000 and 2000/2001 growing seasons. In 1999/2000, the disease occurred in Tarumã; in that year, infestation of chrysomelids (Cerotoma sp. and Colaspis sp.) was observed in Ribeirão Preto. Low infestations of stink bugs occurred in both years and locations, but in Tarumã, at the stage of plant maturation, the insect population exceeded the economic injury level. The severity of powdery mildew was evaluated using a scale varying from 1 (no symptom) to 5 (more than 50% of leaves with symptoms). Chrysomelid injuries were estimated by the percentage of leaf area removed, and stink bug damage was evaluated by the percentage of leaf retention (LRP) and yield. Within the early maturity group (110 days), IAC 94-2675 showed good yield levels, low LRP, and resistance to powdery mildew. In the genotypes of the 120-day maturity group, IAC 94-5, IAC 94-1172, IAC 94-1017, IAC 94-133, and IAC 94-745 presented good yield; the last two behaved as resistant to the disease. With regard to the genotypes of the 135-day maturity group, IAC 93-1564 and IAC 94-2939 showed good yield, low LRP, and resistance to powdery mildew.

scholarly journals Evaluating Soybean Cultivars for Low- and High-Temperature Tolerance During the Seedling Growth Stage

Agronomy ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 13 ◽  
Author(s):  
Firas Ahmed Alsajri ◽  
Bhupinder Singh ◽  
Chathurika Wijewardana ◽  
J. Trenton Irby ◽  
Wei Gao ◽  
...  
Keyword(s):  
High Temperatures ◽  
Seedling Growth ◽  
Growth Stage ◽  
Principal Component ◽  
Temperature Tolerance ◽  
Physiological Parameters ◽  
Maturity Group ◽  
Soybean Cultivars ◽  
Wide Range ◽  
Specific Tolerance

Soybean (Glycine max L.) seedlings may be exposed to low or high temperatures under early or conventional soybean production systems practiced in the US Midsouth. However, a wide range of soybean cultivars commonly grown in the region may inherit diverse tolerance to degrees of temperatures. Therefore, a study was conducted in a controlled-environment facility to quantify 64 soybean cultivars from Maturity Group III to V, to low (LT; 20/12 °C), optimum (OT; 30/22 °C), and high (HT; 40/32 °C) temperature treatments during the seedling growth stage. Several shoot, root, and physiological parameters were assessed at 20 days after sowing. The study found a significant decline in the measured root, shoot, and physiological parameters at both low and high temperatures, except for root average diameter (RAD) and lateral root numbers under LT effects. Under HT, shoot growth was significantly increased, however, root growth showed a significant reduction. Maturity group (MG) III had significantly lower values for the measured root, shoot, and physiological traits across temperature treatments when compared with MG IV and V. Cultivar variability existed and reflected considerably through positive or negative responses in growth to LT and HT. Cumulative stress response indices and principal component analysis were used to identify cultivar-specific tolerance to temperatures. Based on the analysis, cultivars CZ 5225 LL and GS47R216 were identified as most sensitive and tolerant to LT, while, cultivars 45A-46 and 5115LL identified as most tolerant and sensitive to HT, respectively. The information on cultivar-specific tolerance to low or high temperatures obtained in this study would help in cultivar selection to minimize stand loss in present production areas.

Sign in / Sign up

Export Citation Format

Share Document