scholarly journals Strengths and Weaknesses of National Variety Trial Data for Multi-Environment Analysis: A Case Study on Grain Yield and Protein Content

Agronomy ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 753 ◽  
Author(s):  
Vahid Rahimi Eichi ◽  
Mamoru Okamoto ◽  
Trevor Garnett ◽  
Paul Eckermann ◽  
Benoit Darrier ◽  
...  

Multi-environment trial studies provide an opportunity for the detailed analysis of complex traits. However, conducting trials across a large number of regions can be costly and labor intensive. The Australian National Variety Trials (NVT) provide grain yield and protein content (GPC) data of over 200 wheat varieties in many and varied environments across the Australian wheat-belt and is representative of similar trials conducted in other countries. Through our analysis of the NVT dataset, we highlight the advantages and limitations in using these data to explore the relationship between grain yield and GPC in the low yielding environments of Australia. Eight environment types (ETs), categorized in a previous study based on the time and intensity of drought stress, were used to analyze the impact of drought on the relationship between grain yield and protein content. The study illustrates the value of comprehensive multi-environment analysis to explore the complex relationship between yield and GPC, and to identify the most appropriate environments to select for a favorable relationship. However, the NVT trial design does not follow the rigor associated with a normal genotype × environment study and this limits the accuracy of the interpretation.

2020 ◽  
Vol 15 (2) ◽  
pp. 95-109
Author(s):  
Heba Aziz ◽  
Osman El-Said ◽  
Marike Bontenbal

The objective of this study was to measure the level of cruise tourists' satisfaction as well as the relationship between satisfaction, recommendation, return intention, and expenditure. Also, the impact of factors such as nationality, length of the visit, and age on the level of expenditure was measured. An empirical approach for data collection was followed and a total of 152 questionnaires were collected from cruise tourists visiting the capital city of Oman, Muscat, as cruise liners anchor at Sultan Qaboos Port. Results of the regression analysis supported the existence of a causal relationship between satisfaction with destination attributes, overall satisfaction, recommendation, return intention, and expenditure. It was found that the average expenditure varies according to age and length of the visit. Recommendations for policy makers were suggested on how to increase the role of cruise tourism in strengthening the economy.


Author(s):  
Seydi Aydoğan ◽  
Mehmet Şahin ◽  
Aysun Göçmen Akçacık ◽  
Seyfi Taner

This research was conducted to determine grain yield and some quality traits of 18 bread wheat varieties in dry conditions and location in the center of Konya in 2009-2010 growing seasons. Grain yield and some quality characteristics (protein content, zeleny sedimentation, gluten index, alveograph energy value, alveograph P/L, mixograph development time, mixograph peak height, and mixograph softening value and mixograph total area) were examined. According to the results including means ranged between; grain yield 331.85-749.05 kg/da, Protein content 12.62-15.23%, gluten index value of 41.81-98.19%, zeleny sedimentation value 27.00-51.50 ml, alveograph energy 59.70-235.43 10-4 Joules alveograph P/L 0.38 to 1.29, micsograph development time 1.44-4.95 min., mixograph peak height, 42.46-60.67%, mixograph right peak slope 10.13-45.52%, mixograph total area 239.12-322.28% Tq*dak, was found. The experiment has been found significant correlations between traits.


2021 ◽  
Author(s):  
SANGHAMITRA CHOUDHURY ◽  
Shailendra Kumar

<p>The relationship between women, technology manifestation, and likely prospects in the developing world is discussed in this manuscript. Using India as a case study, the paper goes on to discuss how ontology and epistemology views utilised in AI (Artificial Intelligence) and robotics will affect women's prospects in developing countries. Women in developing countries, notably in South Asia, are perceived as doing domestic work and are underrepresented in high-level professions. They are disproportionately underemployed and face prejudice in the workplace. The purpose of this study is to determine if the introduction of AI would exacerbate the already precarious situation of women in the developing world or if it would serve as a liberating force. While studies on the impact of AI on women have been undertaken in developed countries, there has been less research in developing countries. This manuscript attempts to fill that need.</p>


10.28945/3041 ◽  
2006 ◽  
Author(s):  
Karlheinz Kautz ◽  
Bjarke Nielsen

Information systems development takes place within an economical context. However, the economical conditions, which shape systems development in practice, are hardly researched. In this paper we are investigating the question how a given price structure influences systems development projects. Our analysis is based on a multi case study and a Grounded Theory inspired research approach. Our work is informed by economic theories, which deal with the relationship of suppliers and customers and their mutual dependency. We thus apply principal-agent theory and economic game theory in form of the prisoner’s dilemma. As a result we provide three interlinked models for understanding the impact of pricing structure on systems development practice. The main elements of these models are pricing structure, risk distribution and price level, and opportunistic behavior. We discuss how these elements are interrelated and examine their impact on information systems development in practice.


2019 ◽  
Vol IV (I) ◽  
pp. 108-119
Author(s):  
Mujib Ur Rahman ◽  
Muhammad Faizan Malik ◽  
Wisal Ahmad

The paper examined the impact of relational capitals on community economic development. For this purpose, the handloom business community was taken as a case study from Peshawar Valley. Data was collected through purposive sampling from169 handlooms firms. The results concluded that the impact of relational capital is significant, and the relationship is positive. This study hereby suggests that government and policymakers should invest in making ties and a strong network of firms within and outside of the community; hence with high investment in making strong social-relational capital can develop the entire entrepreneurial communities.


Author(s):  
Edy Effendi ◽  
Muhammad Imron

Research on the role of the APIP review of the Ministry/agency Work Plan and Budget document to determine the impact on the efficiency of ministry/agency spending (case study at the Ministry of Religion). The method used in this study uses simple linear regression with dummy. The use of linear regression is used to examine the relationship between independent variables (certain types of expenditure) and dependent variables (total expenditure). Whereas, dummy is used to find out before and after the APIP review is done. Throughout the author's search, this research has never been done. Based on the results of linear regression obtained, the APIP review significantly had a positive effect on official travel expenditure and honorarium but did not significantly affect building spending and equipment. Abstrak   Penelitian atas peran reviu APIP atas dokumen Rencana Kerja dan Anggaran Kementerian Negara/Lembaga untuk mengetahui dampaknya terhadap efisiensi belanja kementerian/lembaga (studi kasus pada Kementerian Agama). Metode yang digunakan dalam penelitian ini menggunakan regresi linier sederhana dengan dummy. Penggunaan regresi liner digunakan untuk meneliti hubungan antara variable independen (jenis belanja tertentu) dan variable dependen (total belanja). Sedangkan, dummy digunakan untuk mengetahui sebelum dan setelah reviu APIP dilakukan. Sepanjang penelusuran penulis, penelitian ini belum pernah dilakukan. Berdasarkan hasil regresi linier diperoleh, reviu APIP signifikan berpengaruh positif terhadap  belanja perjalanan dinas dan honorarium tetapi tidak signifikan berbengaruh terhadap belanja gedung dan alat.


Author(s):  
Najmudin Najmudin

The results shows that there are changes of social capital of dairy farmers groups in the process of institutionalization of SAMESTA cooperatives. The change is the impact of the conditions of Indonesian dairy. These changes occur in several elements of social capital, as follows: (1) Value, as a guide and reinforcement of farmers’ positive behavior. The existing values among farmers are klangenan (like), titen (scrutinize deeply), honesty, and togetherness. These values ​​become the fuel that forces the farmers to relate each other and realize the more transparent and fairer cooperative. This case shows the influence of cultural values ​​on the farmers’ economic behavior. They calculate inputs and outputs, and make some adjustments to prevent them from losing and calculate the standard number of cows that they have. (2) Trust changes positively, especially by raising the milk price from farmers, although it gives a risk to the cooperative income. This decision is expected to increase the farmers' ethos, thus impacts on the increase of milk production. (3) Networks, in which the relationship between farmers firstly occurs in hamlet area, then it extends the network beyond those limits. Farmers from different villages are connected naturally. This inter-subject's relationship occurs due to the same goals, which are wishes to be more dignified, prosperous, and get fair treatment.


Author(s):  
N. Kosyachenko ◽  
Marina Abramova ◽  
M. Lapina

Abstract. Aim. The study of the influence of crossbriding on the growth and development of heifers and subsequent productive and reproductive qualities of cows on the first lactation. Methods. Using statistical methods, correlation analysis and ANOVA for evaluated genetic indicators of economic-valuable traits of dairy cattle. In particular was studied live weight of heifers from birth to 18 months, first insemination age and first fecundation age, live weight at fecundation, frequency of insemination, first calving age, days open, live weight at first lactation, milk yield for 305 days (kg), fat (%, kg) and protein (%, kg) in milk. Results. Relationship between productive indicators and the genotype of the animal is established. When assessing the strength of the influence of the factor «blood on the Holstein breed» it was found that the greatest impact can be traced at the age of 6 and 18 months, and is respectively 12.7 % and 17.1 %.The reproductive qualities of the first-calf cows decreased with the increase percent of blood in the Holstein breed. Evaluation of the impact of crossbreeding on milk production at first lactation has revealed significant strong influence on milk yield for 305 days of first lactation, and related signs the amount of milk fat and protein. According to qualitative indicators, the low influence of the Holstein blood fraction was found, while to a greater extent on the fat content than on the protein content in milk. Evaluation of phenotypic and genotypic correlations of milk yield and quality components of milk revealed average negative phenotypic and low negative genotypic correlation in all groups. The exception was in heifers of Yaroslavl breed with percent of Holstein blood less than 50 %, in which the relationship of yield x protein was positive. The relationship between milk yield and fat and protein content in milk has the opposite moderate character and strength. Practical significance. Studies was established that breeding of animals of Holstein and Yaroslavl breeds in one herd allows to receive an optimum ratio of milk production with optimal percentage fat and protein. For this herd among animals of the improved genotypes of the Yaroslavl breed, the use of genotypes with a percent of blood in the Holstein breed from 75.1 % to 87.6 % is optimal, which should be taken into account when selecting bulls to the breeding program.


2017 ◽  
Vol 39 (3) ◽  
pp. 5
Author(s):  
Solano Dos Santos Nascimento

ResumoO artigo apresenta o resultado de um estudo de casos múltiplos a respeito da relação entre três reportagens que trataram de problemas sociais – publicadas pela revista Época e pelos jornais O Globo e Correio Braziliense - e mudanças na legislação que teoricamente buscaram resolver os problemas apontados pelas reportagens. O estudo concluiu que houve influência das reportagens nas mudanças em leis, mas que esse impacto teve nuanças bastante distintas.AbstractThis report presents the results of a multiple case study about the relationship between three stories  that dealt with social problems - published by Época magazine and O Globo and Correio Braziliense newspapers  - and changes in legislation that theoretically sought to solve the problems pointed out by the stories . The study conclusion was that there was influence of the stories in laws  changes, the impact had quite different shades. ResumenEl artículo presenta el resultado de un estudio de casos múltiples acerca de la relación entre tres reportajes sobre problemas sociales-publicados por la revista Época y por los periódicos O Globo y Correio Braziliense - y cambios en la legislación que teóricamente buscaron resolver los problemas señalados por los reportajes . El estudio concluyó que hubo influencia de los reportajes en los cambios de leyes, pero que ese impacto tuvo matices muy distintos.


Author(s):  
Jindřiška Kučerová

The results of three-year trials (1999 to 2001) conducted with six winter wheat varieties in which was studied the grain yield and parameters of technological quality. Varieties of wheat come from four different localities of the Czech Republic. The most favourable weather conditions, a lot of precipitation and high temperature in the course of ripening from three years were proved in the year 2000. The best grain yield were in 2001 (average of sites 8.84 t/ha) and variety Semper, worst quality, had the highest grain yield of 9.17 t/ha, the least grain yield had Sulamit, best quality (7.94 t/ha). The laboratory analysis revealed negative correlation between grain yield and baking quality. The number of statistically highly significant correlations among bread-making quality parameters too.The negative correlation was of grain yield and grain volume mass (P < 0.05), Zeleny test and protein content taken as a whole for three years (P < 0.01). The correlation of loaf volume, which is the traits of baking quality and Zeleny test (r = 0.6016**), protein content (r = 0.5932**), dough stability (r = 0.2898**) and flour water absorption (r = 0.3632**) was positive (P < 0.01).


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