scholarly journals Adaptability and stability of common bean genotypes in family farming systems

2018 ◽  
Vol 53 (2) ◽  
pp. 189-196 ◽  
Author(s):  
Patrícia Guimarães Santos Melo ◽  
Renata Cristina Alvares ◽  
Helton Santos Pereira ◽  
Antônio Joaquim Braga Pereira Braz ◽  
Luis Claudio Faria ◽  
...  
Keyword(s):  
Common Bean ◽  
Interaction Model ◽  
Weighted Average ◽  
Farming Systems ◽  
Farming System ◽  
Graphical Analysis ◽  
Environment Interaction ◽  
Family Farming ◽  
The Stability ◽  
The One

Abstract: The objective of this work was to evaluate the interaction between genotypes and environments for grain yield of common bean (Phaseolus vulgaris) lines and cultivars with potential for use in family farming systems. Data from value for cultivation and use tests, carried out in 20 environments in the state of Goiás, Brazil, were analyzed in two cycles (2007/2008 and 2009/2010) in the dry, rainy, and winter crop seasons. Each test consisted of 15 genotypes from the carioca, purple, and rosinha common bean commercial groups. The experimental design was randomized complete block, with three replicates. The methodologies used to test the stability and adaptability of the genotypes were the one of Lin & Binns, of Cruz, the additive main effects and multiplicative interaction model (AMMI) to calculate the weighted average of absolute scores and productivity (WAASP), and the GGE biplot graphical analysis. The productive performance of the common bean lines and cultivars is affected by genotype x environment interaction. The methodologies adopted allow the selection of cultivars for cropping, and of cultivars and lines for use as parents in order to obtain segregating populations for selection in a family farming system.

scholarly journals Yield Components Stability Assessment of Peas in Conventional and Low-Input Cultivation Systems

Agriculture ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 805
Author(s):  
Vasileios Greveniotis ◽  
Elisavet Bouloumpasi ◽  
Stylianos Zotis ◽  
Athanasios Korkovelos ◽  
Constantinos G. Ipsilandis
Keyword(s):  
Seed Yield ◽  
Stability Index ◽  
Farming Systems ◽  
Farming System ◽  
Genotype By Environment Interaction ◽  
Environment Interaction ◽  
Low Input ◽  
Cultivation Systems ◽  
Biplot Analysis ◽  
Stable Performance

The primary purpose of this study was to explore yield stability of pea (Pisum sativum L.) cultivars based on stability index, with specific aim at studying cultivar behavior regarding yield of peas under both conventional and low-input cultivation systems. Five cultivars of peas were used in a strip-plot design. Correlations showed a significant positive relation between seed yield and some other traits. Indirect seed yield improvement may be implemented by improving pod length, which generally showed high stability indices in Greek mega-environment. Comparisons between conventional and low-input farming systems generally did not affect stability estimations, but revealed cultivars that exhibited stable performance, even in low-input farming systems. The additive main effects and multiplicative interaction (AMMI) biplot analysis, genotype by environment interaction (GGE) biplot analysis and analysis of variance (ANOVA) showed statistically significant differences between genotypes and environments, and also the farming system. This way, we have certain cultivars of peas to recommend for specific areas and farming system, in order to achieve the most stable performance. Vermio proved to be a stable cultivar for seed yield performance, in Giannitsa, Trikala and Kalambaka area, in low-inputs farming systems, while Olympos was the best in Florina area and low-input farming.

Stability and Dynamical Analysis of Generalized Tumor-Immune Interaction Model with Conformable Fractional Derivative

2021 ◽  
Author(s):  
Rimpi Pal ◽  
Afroz ◽  
Ayub Khan ◽  
MOHMAD AUSIF PADDER
Keyword(s):  
Stability Analysis ◽  
Fixed Points ◽  
Fractional Order ◽  
Interaction Model ◽  
Tumor Model ◽  
Graphical Analysis ◽  
Dynamical Analysis ◽  
Complex Behaviour ◽  
The Stability ◽  
Two Parameters

Abstract Fractional order tumor-immune interaction models are being frequently used for understanding the complex behaviour of immune system and tumor growth. In this paper, a generalized fractional order tumor-immune interaction model has been developed by introducing immunotherapy (IL2) as third variable in the model. The study of generalized model is done by using conformable fractional order derivative. The stability analysis is done for both fractional order tumor model and its conformable fractional order version. By considering some biological fixed points for both versions of the model, the stability analysis around these fixed points shows that both the systems are stable at some fixed point under some stability conditions, which are defined in the model analysis. The numerical and graphical analysis is also done for both the systems by varying two parameters and keeping other parameters fixed for better understanding the dynamics of proposed model.

YIELD STABILITY IN INTERCROPPING STUDIES OF SORGHUM OR MAIZE WITH COWPEA OR COMMON BEAN UNDER DIFFERENT FERTILITY LEVELS IN NORTHEASTERN BRAZIL

1983 ◽  
Vol 63 (4) ◽  
pp. 789-799 ◽  
Author(s):  
M. A. FARIS ◽  
M. R. A. de ARAÚJO ◽  
M. de A. LIRA ◽  
A. S. S. ARCOVERE
Keyword(s):  
Common Bean ◽  
Total Yield ◽  
Relative Yield ◽  
Yield Stability ◽  
Northeastern Brazil ◽  
Environment Interaction ◽  
Land Equivalent Ratio ◽  
The Mean ◽  
The Stability ◽  
Sorghum Bicolor L

Experimental evidence on yield stability of intercropping is sparse. This work was carried out to examine the stability of four intercrop patterns: maize (Zea mays L.)/cowpea (Vigna unguiculata (L.) Walp); maize/common bean (Phaseolus vulgaris L.); sorghum (Sorghum bicolor (L.) Moench)/cowpea; and, sorghum/common bean against their component crops. Twenty-one trials were established from 1974 to 1978. The mean relative yield advantage of intercropping patterns as indicated by the land equivalent ratio (LER) was 32%. The combined analysis of variance for the absolute total yields revealed that most of the pattern × environment interaction is accounted for by the heterogeneity of regressions. Pulses were less responsive to environmental change. However, cereals were more responsive to improvement in the environment resulting in increased yield. The regression lines of the intercropping patterns and sole cereals were closer to each other, due to the low yield contribution of the pulses to the intercropping total yield. However, the slopes of the intercropping pattern lines were closer to b = 1.0. On the basis of mean yield and regression slope, it was demonstrated that sole cereals or intercropping have better performance stability than sole pulses in northeastern Brazil.Key words: Stability, intercropping, sorghum, maize, cowpea, common bean

Stability and inheritance of storage-induced hardening in 20 common bean cultivars

1991 ◽  
Vol 71 (3) ◽  
pp. 641-647 ◽  
Author(s):  
T. E. Michaels ◽  
D. W. Stanley
Keyword(s):  
Phaseolus Vulgaris ◽  
Common Bean ◽  
Coefficient Of Variation ◽  
High Standard ◽  
Phenotypic Variance ◽  
Environment Interaction ◽  
Phaseolus Vulgaris L ◽  
Mean Values ◽  
Coefficients Of Variation ◽  
The Stability

Storage of common bean (Phaseolus vulgaris L.) in elevated temperature and/or humidity conditions leads to a textural defect where the beans harden and fail to soften upon soaking and cooking. The objectives of this study were to determine the stability of 20 common bean cultivars grown in three environments for initial hardness, final hardness following storage and hardening ratio, and to estimate the heritability of these hardening parameters. Cultivar × environment interaction was highly significant for the hardening parameters. When stability was examined by plotting hardness against coefficient of variation across environments, three cultivars, GN-77135B, ICA Pijao and T39 Black Turtle, were marginally below the mean for both final hardness and coefficient of variation. While the coefficients of variation for the red kidney bean cultivars Redkloud and Montcalm were high, the maximum compression forces were only slightly (< 20%) greater than the maximum acceptable hardness level as determined by a sensory panel. Fiesta Pinto had the lowest coefficient of variation and near mean values for both final hardness and hardening ratio making it arguably the cultivar with best combination of texture and stability. Heritability estimates were low (0–0.24) with high standard error and estimates of the proportion of phenotypic variance due to G × E were moderate to high (0.29–0.69). Initial cultivar improvement efforts should focus on developing cultivars with greater stability across environments for the hardening parameters. Key words: Phaseolus vulgaris L., storage-induced hardening, stability, broad sense heritability, bean (common)

scholarly journals Sustainability Matters: Consumer Acceptance of Different Vertical Farming Systems

2019 ◽  
Vol 11 (15) ◽  
pp. 4052 ◽  
Author(s):  
Kristin Jürkenbeck ◽  
Andreas Heumann ◽  
Achim Spiller
Keyword(s):  
Structural Equation ◽  
Online Survey ◽  
Farming Systems ◽  
Farming System ◽  
Growth Conditions ◽  
Consumer Acceptance ◽  
Conventional Farming ◽  
Vertical Farming ◽  
The One ◽  
Global Population

Fresh produce within vertical farming systems grows vertically in different layers stacked atop each other, thus allowing for the efficient use of space. As the environment in vertical farming systems is completely controlled, neither sunlight nor soil is necessary. On the one hand, vertical farming may help to provide a healthy diet for the growing global population because it has a greater crop yield per square meter used than conventional farming; moreover, it can offer the opportunity to grow food in climatically disadvantaged areas. On the other hand, growth conditions may be perceived as unnatural and the entire vertical farming system as unsustainable. Therefore, understanding the consumers’ acceptance of vertical farming systems is important. This study is the first work to provide insights into consumers’ acceptance of three different vertical farming systems. Data are collected through an online survey of 482 consumers in Germany in February 2018. Drivers of consumer acceptance of vertical farming systems are identified through structural equation modelling. The results indicate that perceived sustainability is the major driver of consumer acceptance of vertical farming systems. The larger the system, the higher the likelihood that it will be considered as sustainable. Obviously, consumers perceive something like ecologies of scale.

scholarly journals Assessment of Interactions between Yield Components of Common Vetch Cultivars in Both Conventional and Low-Input Cultivation Systems

Agriculture ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 369
Author(s):  
Vasileios Greveniotis ◽  
Elisavet Bouloumpasi ◽  
Stylianos Zotis ◽  
Athanasios Korkovelos ◽  
Constantinos Ipsilandis
Keyword(s):  
Seed Yield ◽  
Genetic Material ◽  
Stability Index ◽  
Farming Systems ◽  
Farming System ◽  
Common Vetch ◽  
Low Input ◽  
Cultivation Systems ◽  
Stable Performance ◽  
The Stability

The primary purpose of this study was to explore yield stability of common vetch varieties based on the stability index, with a specific aim of exploring common vetch variety behavior regarding the yield of legumes under both conventional and low-input cultivation systems. Six varieties of common vetch (Vicia sativa L.), namely, cv. Filippos, cv. Omiros, cv. Alexandros, cv. Tempi, cv. Zefyros and cv. Pigasos, were used. The cultivation was conducted using a strip-plot design with the six varieties randomized within each plot in two farming systems (conventional and low-input). Filippos was the best variety in conventional farming for seed yield, followed by Omiros. Omiros was the best variety in the low-input farming system for seed yield. Comparisons between conventional and low-input farming systems generally did not display any effect on stability estimations, but revealed the varieties that exhibit stable performance even in low-input farming systems. Stability analysis via the AMMI1 and GxE biplot analysis for one main factor showed two groups of varieties for seed yield with similar behavior. Genotype and environment distribution were used to group varieties that showed better performance in certain environments for seed yield but with differences in comparison to other traits. Correlations between traits showed the positive relation of seed yield to the number of pods per plant, the number of seeds per pod, the pod length, the mean weight of pods and, especially, the hay weight (r = 0.771), a useful finding for indirect selection for breeders. The results provide valuable data regarding the genetic material, its adaptability and stability in varied environments and suitability for low-input cultivation systems.

scholarly journals Performance and Stability of Different Monoecious Hemp Cultivars in a Multi-Environments Trial in North-Eastern Italy

Agronomy ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1424
Author(s):  
Claudio Ferfuia ◽  
Fabio Zuliani ◽  
Francesco Danuso ◽  
Barbara Piani ◽  
Costantino Cattivello ◽  
...  
Keyword(s):  
Seed Yield ◽  
Cannabis Sativa ◽  
Weighted Average ◽  
Stability Index ◽  
Grain Filling ◽  
Mediterranean Area ◽  
Environment Interaction ◽  
North Eastern ◽  
Grain Filling Period ◽  
The Stability

The seed yield in hemp (Cannabis sativa L.) is strongly influenced, besides by genotype, by environment and the genotype x environment interaction, so establishing the fitness and stability of hemp cultivars in multiple environments is necessary. The purpose of this study was to investigate the performance and degree of stability and variance of seed yield, the main related traits, and the correlation among the traits in five hemp monoecious cultivars cultivated in six different environments. The environments resulted from the combination of four locations, two years, and two delayed sowings in a Mediterranean area of north-eastern Italy, and the stability index of the weighted average of absolute scores (WAAS) was used in order to identify the most productive and stable genotypes on the basis of their deviation from the average performance across environments. In this studied area, early varieties, such as Fedora and Felina, proved to be the best performing and stable for seed yield and both increased their yield in correspondence to delayed sowing times, opening up the possibility of cultivating hemp as a second crop. Among the climate parameters, high temperatures during the early grain filling period led to a progressive decrease in seed yield. For a dual-purpose crop, a good compromise could be a late monoecious cultivar (like Futura, in the present experiment), which, if sown early, could certainly provide notable biomass production and acceptable seed yield.

Appraisal of common bean farming systems under angular leaf spot disease prone environments of the Southern Highlands of Tanzania

2016 ◽  
Vol 50 (5) ◽  
Author(s):  
Rose Mongi ◽  
Pangirayi Tongoona ◽  
Hussein Shimelis ◽  
Julia Sibiya
Keyword(s):  
Common Bean ◽  
Leaf Spot ◽  
Durable Resistance ◽  
Farming Systems ◽  
Farming System ◽  
Angular Leaf Spot ◽  
Leaf Spot Disease ◽  
Production Constraints ◽  
Pseudocercospora Griseola ◽  
Structured Questionnaire

Angular leaf spot caused by Pseudocercospora griseola is the most destructive disease of common bean (Phaseolus vulgaris L) in the Southern Highlands of Tanzania (SHT). The objectives of this study were to assess the farming system and farmers awareness in the ALS disease prone environments of the SHT. A structured questionnaire was designed to collect information from 238 respondents sampled from Mbeya, Njombe, Iringa and Rukwa regions. Data collected included population demography, production constraints, and indicators of poverty. The results showed that ALS widely occurred in the SHT but farmers were not aware of the disease and sources of inocula. Most of the respondents were poor with average yields of less than 500 kg ha-1. Lack of knowledge on ALS disease and the presence of favorable environmental conditions increased chances of P. griseola proliferation. Therefore, trainings on awareness and intensification of extension services is important. Breeding for durable resistance is an overriding consideration towards increasing bean productivity in the SHT.

scholarly journals Domination and Power Relations in Brazilian Agriculture: A Gender Analysis of the Concept of Adequate Food

2018 ◽  
Vol 17 (2) ◽  
pp. 259-289
Author(s):  
Tânia Aparecida Kuhnen ◽  
Daniela Rosendo
Keyword(s):  
Large Scale ◽  
Farming System ◽  
Dietary Guidelines ◽  
Agricultural System ◽  
Gender Analysis ◽  
Family Farming ◽  
Right To Food ◽  
Adequate Food ◽  
The One ◽  
The Right

The main subject of this paper is the concept of adequate food defined by the Brazilian Law No 11.346/06, whose implications are discussed through a gender – especially ecofeminist – lens. The Law defines the right to food that is also considered a fundamental right in the Brazilian Constitution. At the same time, the Brazilian economy is centered on crops production in a large-scale farming system for exportation. Based on that, the following question is addressed: is the concept of adequate food compatible with the economic privilege attributed to the massive agricultural system and to factory farms? The aim is to show that they are incompatible and the alternative is a defense of organic family farming and a plant-based diet, as it is presented in the  “Dietary Guidelines for the Brazilian Population” (2014). Another problem that arises from this issue is that agriculture in this large-scale dimension reflects structures of power and domination (Karen J. Warren) and animals used for corpse eating disappears, becoming absent referents (Carol J. Adams). It reflects the structure of a patriarchal society, where men have power over women, animals, and plants. The hypothesis is that in family farming women can participate more in the decision-making process, reflecting equality and justice in the private sphere. For that, the Special Reports on adequate food will be considered, mainly the one related to the mission of the Special Rapporteur to Brazil, whose analysis brings information on the gender category. This analysis draws attention to the situation of women in their struggles to fulfill the right to adequate food.

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