scholarly journals Determination of the Role of Berberis spp. in Wheat Stem Rust in China

Plant Disease ◽  
2015 ◽  
Vol 99 (8) ◽  
pp. 1113-1117 ◽  
Author(s):  
Jie Zhao ◽  
Shilei Zhao ◽  
Xianming Chen ◽  
Zhiyan Wang ◽  
Long Wang ◽  
...  

Previous studies on the relationship of barberry (Berberis spp.) and wheat stem rust suggested that, although some barberry species can serve as alternate hosts for the stem rust fungus Puccinia graminis f. sp. tritici, barberry plants play no role in wheat stem rust development and virulence variation of P. graminis f. sp. tritici in China. In the present study, severe rust infections on Berberis shensiana, B. brachypoda, B. potaninii, B. soulieana, and B. aggregata were observed during field surveys in 2011 and 2012. Through artificial inoculation of wheat seedlings (‘Mingxian 169’) under greenhouse conditions with aeciospores from naturally infected barberry plants, 185 isolates of P. graminis f. sp. tritici were obtained. From the 27 selected isolates that were tested on a set of wheat genotypes used to differentiate P. graminis f. sp. tritici races in China, 18 races were identified, of which 8 races were new and others were of Chinese 21 and 34 race groups. In addition to the information of virulence or avirulence patterns on the Chinese differentials, none of the races were virulent to resistance gene Sr31. The virulence frequencies based on individual Sr genes or differentials ranged from 0 to 96%. Using molecular markers for P. graminis f. sp. tritici, 75 of 4,036 samples of single aecia were identified as P. graminis f. sp. tritici. The low detectable rate of P. graminis f. sp. tritici was verified based on both infection and molecular marker tests. This observation may be correlated with the low levels of wheat stem rust in the surveyed regions. This study shows that P. graminis f. sp. tritici can produce new races through sexual reproduction on Berberis spp. in China.

2018 ◽  
Vol 35 (1) ◽  
Author(s):  
Susan Douglas

Revision of the National Mediator Accreditation System, effective from 1 July 2015, removes the requirement for mediators to demonstrate understanding of neutrality as an ethical competency. The principle of impartiality has been retained and the principle of self-determination has been newly included as an ethical competency. The self-determination of participants, recognised in the original version of the NMAS, has been more clearly articulated as the aim of mediation practice. Abandonment of the principle of neutrality signals a need to reconsider the role of the mediator, which was once identified with control of the process of mediation, though neutral as to its content and outcome. Abandonment of neutrality calls for an alternative frame of reference for ethical practice in mediation. In this paper, the relationship of trust between mediator and parties is proposed as a suitable and defensible alternative ethical framework. It is argued that this relationship can be constructed according to principles associated with fiduciary and therapeutic relationships, in recognition of the distinctive socio-legal context of practice. Abandonment of neutrality also raises issues as to the mediator’s role in achieving fairness for participants. It is argued that relationships of trust provide a convincing framework within which to consider issues of substantive fairness in mediation.


2019 ◽  
Vol 22 (8) ◽  
pp. 967-977 ◽  
Author(s):  
A. S. Rsaliyev ◽  
Sh. S. Rsaliyev

 Wheat stem rust caused by the biotrophic fungus Puccinia graminis f. sp. tritici is a dangerous disease that seriously damages the economics in many countries of the world. The review contains information about epidemics of wheat stem rust and causes of their emergence worldwide. Recently wheat stem rust epidemics have been recorded in the northern regions of Kazakhstan and on the territories adjacent to Omsk Region of Russia. It has been shown that severe wheat stem rust epidemics occur mainly due to the emergence of new virulent races of the disease agent and to growing susceptible wheat cultivars. New methods of studying the race composition of the fungus are described as well as the use of the previous and current differential sets for race determination of P. graminis f. sp. tritici. The results of developing molecular markers and assessing their effectiveness in studying stem rust races are presented. Wheat stem rust races dominant in major grain-growing countries of the globe and their typical peculiarities are described. The paper contains information on identifcation of race Ug99 and of its variations including data on areas of their dissemination and on their virulence to Sr-resistance genes. The existence and emergence of other races of the agent potentially dangerous for commercially important genes for stem rust resistance is also described. Currently in nature strongly virulent races of P. graminis f. sp. tritici are circulating with wide geographical coverage and their virulence is absolutely different from the virulence of race Ug99. Historical and modern data on studying the race composition of the pathogen in Kazakhstan are summarized. It is stated that the use of the old standard differential set and an incomplete North American system of race nomenclature in experiments prevents measuring similarity between Kazakhstani races and the worldwide known races of the pathogen. It has been shown that there is a need to continue studies on the intraspecies structure of the disease agent’s population in Kazakhstan with the use of the modern differential set, on determination of race composition and ways of emergence of new races potentially dangerous for commercial wheat varieties.


2020 ◽  
Vol 17 (6) ◽  
pp. 76-91
Author(s):  
E. D. Solozhentsev

The scientific problem of economics “Managing the quality of human life” is formulated on the basis of artificial intelligence, algebra of logic and logical-probabilistic calculus. Managing the quality of human life is represented by managing the processes of his treatment, training and decision making. Events in these processes and the corresponding logical variables relate to the behavior of a person, other persons and infrastructure. The processes of the quality of human life are modeled, analyzed and managed with the participation of the person himself. Scenarios and structural, logical and probabilistic models of managing the quality of human life are given. Special software for quality management is described. The relationship of human quality of life and the digital economy is examined. We consider the role of public opinion in the management of the “bottom” based on the synthesis of many studies on the management of the economics and the state. The bottom management is also feedback from the top management.


2019 ◽  
Vol 58 (2) ◽  
pp. 249-259
Author(s):  
Joseph Acquisto

This essay examines a polemic between two Baudelaire critics of the 1930s, Jean Cassou and Benjamin Fondane, which centered on the relationship of poetry to progressive politics and metaphysics. I argue that a return to Baudelaire's poetry can yield insight into what seems like an impasse in Cassou and Fondane. Baudelaire provides the possibility of realigning metaphysics and politics so that poetry has the potential to become the space in which we can begin to think the two of them together, as opposed to seeing them in unresolvable tension. Or rather, the tension that Baudelaire animates between the two allows us a new way of thinking about the role of esthetics in moments of political crisis. We can in some ways see Baudelaire as responding, avant la lettre, to two of his early twentieth-century readers who correctly perceived his work as the space that breathes a new urgency into the questions of how modern poetry relates to the world from which it springs and in which it intervenes.


2012 ◽  
Vol 34 (3) ◽  
pp. 169-184 ◽  
Author(s):  
Hoang Thi Bich Ngoc

Vertical axis wind turbine technology has been applied last years, very long after horizontal axis wind turbine technology. Aerodynamic problems of vertical axis wind machines are discussible. An important problem is the determination of the incidence law in the interaction between wind and rotor blades. The focus of the work is to establish equations of the incidence depending on the blade azimuth, and to solve them. From these results, aerodynamic torques and power can be calculated. The incidence angle is a parameter of velocity triangle, and both the factors depend not only on the blade azimuth but also on the ratio of rotational speed and horizontal speed. The built computational program allows theoretically selecting the relationship of geometric parameters of wind turbine in accordance with requirements on power, wind speed and installation conditions.


1986 ◽  
Vol 14 (4) ◽  
pp. 201-218 ◽  
Author(s):  
A. G. Veith

Abstract This four-part series of papers addresses the problem of systematic determination of the influence of several tire factors on tire treadwear. Both the main effect of each factor and some of their interactive effects are included. The program was also structured to evaluate the influence of some external-to-tire conditions on the relationship of tire factors to treadwear. Part I describes the experimental design used to evaluate the effects on treadwear of generic tire type, aspect ratio, tread pattern (groove or void level), type of pattern (straight rib or block), and tread compound. Construction procedures and precautions used to obtain a valid and functional test method are included. Two guiding principles to be used in the data analyses of Parts II and III are discussed. These are the fractional groove and void concept, to characterize tread pattern geometry, and a demonstration of the equivalence of wear rate for identical compounds on whole tread or multi-section tread tires.


Author(s):  
Pavel Agapov ◽  
Kirill Stepkin

The article considers the general theoretical foundations of the relationship of sectarianism and religious extremism in the Russian Federation. Practical examples of the role of destructive sects in modern religious extremism in the Russian Federation are given.


2020 ◽  
Vol 63 (4) ◽  
pp. 115-131
Author(s):  
Maria M. Kuznetsova

The article examines the philosophy of Henri Bergson and William James as independent doctrines aimed at rational comprehension of spiritual reality. The doctrines imply the paramount importance of consciousness, the need for continuous spiritual development, the expansion of experience and perception. The study highlights the fundamental role of spiritual energy for individual and universal evolution, which likens these doctrines to the ancient Eastern teaching as well as to Platonism in Western philosophy. The term “spiritual energy” is used by Bergson and James all the way through their creative career, and therefore this concept should considered in the examination of their solution to the most important philosophical and scientific issues, such as the relationship of matter and spirit, consciousness and brain, cognition, free will, etc. The “radical empiricism” of William James and the “creative evolution” of Henry Bergson should be viewed as conceptions that based on peacemaking goals, because they are aimed at reconciling faith and facts, science and religion through the organic synthesis of sensory and spiritual levels of experience. Although there is a number of modern scientific discoveries that were foreseen by philosophical ideas of Bergson and James, both philosophers advocate for the artificial limitation of the sphere of experimental methods in science. They call not to limit ourselves to the usual intellectual schemes of reality comprehension, but attempt to touch the “living” reality, which presupposes an increase in the intensity of attention and will, but finally brings us closer to freedom.


2020 ◽  
Author(s):  
Agnieszka Wykowska ◽  
Jairo Pérez-Osorio ◽  
Stefan Kopp

This booklet is a collection of the position statements accepted for the HRI’20 conference workshop “Social Cognition for HRI: Exploring the relationship between mindreading and social attunement in human-robot interaction” (Wykowska, Perez-Osorio & Kopp, 2020). Unfortunately, due to the rapid unfolding of the novel coronavirus at the beginning of the present year, the conference and consequently our workshop, were canceled. On the light of these events, we decided to put together the positions statements accepted for the workshop. The contributions collected in these pages highlight the role of attribution of mental states to artificial agents in human-robot interaction, and precisely the quality and presence of social attunement mechanisms that are known to make human interaction smooth, efficient, and robust. These papers also accentuate the importance of the multidisciplinary approach to advance the understanding of the factors and the consequences of social interactions with artificial agents.


2020 ◽  
Vol 2 (4) ◽  
pp. 126-130
Author(s):  
N. V. SHAMANIN ◽  

The article raises the issue of the relationship of parent-child relationships and professional preferences in pedagogical dynasties. Particular attention is paid to the role of the family in the professional development of the individual. It has been suggested that there is a relationship between parent-child relationships and professional preferences.


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