scholarly journals Effect of Seedborne Potato virus Y on Performance of Russet Burbank, Russet Norkotah, and Shepody Potato

Plant Disease ◽  
2004 ◽  
Vol 88 (3) ◽  
pp. 248-252 ◽  
Author(s):  
Phillip Nolte ◽  
Jonathan L. Whitworth ◽  
Michael K. Thornton ◽  
Christopher S. McIntosh
Keyword(s):  
Potato Virus ◽  
Potato Virus Y ◽  
Negative Impact ◽  
Regression Analyses ◽  
Russet Norkotah ◽  
The University ◽  
The Impact ◽  
University Of Idaho ◽  
Field Plots ◽  
Healthy Seed

Potato virus Y (PVY) is one of the most important of the potato viruses, but little is known about the impact on yield of seedborne infection levels below 100%. Blending infected and healthy seed from different seed lots introduces the variable of performance differences between the seed lots, which may obscure the effect of virus alone. Seed lots containing various levels of seedborne PVY (0, 2, 10, 20, and 50% incidence of infected tubers) were created by combining in different proportions seed pieces from healthy and infected tubers from the same seed source. These seed lots were planted in replicated field plots at the University of Idaho Parma R & E Center in Parma, ID from 1995 to 1997. Regression analyses on data from the three consecutive seasons indicate that seedborne PVY has virtually the same negative impact on yield for all three cultivars.

scholarly journals The impact of the COVID-19 outbreak on Chinese-listed tourism stocks

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Wenmin Wu ◽  
Chien-Chiang Lee ◽  
Wenwu Xing ◽  
Shan-Ju Ho
Keyword(s):  
Stock Returns ◽  
Cultural Differences ◽  
Stock Price ◽  
Negative Impact ◽  
Tourism Industry ◽  
Regression Analyses ◽  
Short Term ◽  
Tourism Sector ◽  
Event Study Method ◽  
The Impact

AbstractThis research explored the effects of the coronavirus disease (COVID-19) outbreak on stock price movements of China’s tourism industry by using an event study method. The results showed that the crisis negatively impacted tourism sector stocks. Further quantile regression analyses supported the non-linear relationship between the government’s responses and stock returns. The results present that the resurgence of the virus in Beijing did bring about a short-term negative impact on the tourism industry. The empirical results can be used for future researchers to conduct a comparative study of cultural differences concerning government responses to the COVID-19.

scholarly journals Arbuscular Mycorrhiza Changes the Impact of Potato Virus Y on Growth and Stress Tolerance of Solanum tuberosum L. in vitro

2020 ◽  
Vol 10 ◽  
Author(s):  
Edyta Deja-Sikora ◽  
Anita Kowalczyk ◽  
Alina Trejgell ◽  
Adriana Szmidt-Jaworska ◽  
Christel Baum ◽  
...  
Keyword(s):  
Solanum Tuberosum ◽  
Arbuscular Mycorrhiza ◽  
Stress Tolerance ◽  
Potato Virus ◽  
Potato Virus Y ◽  
Solanum Tuberosum L ◽  
The Impact

scholarly journals Analysis and Assessment of New Permanent Teacher Training Activities under the Erasmus+ Program from the Perspective of the Participants of Spain in Times of COVID-19

2021 ◽  
Vol 13 (20) ◽  
pp. 11222
Author(s):  
Daniel Salcedo-López ◽  
Mercedes Cuevas-López
Keyword(s):  
Teacher Training ◽  
Negative Impact ◽  
Positive Impact ◽  
Student Mobility ◽  
The European Union ◽  
International Mobility ◽  
Global Pandemic ◽  
Training Activities ◽  
The University ◽  
The Impact

The Erasmus+ program (2014–2020) is one of the main initiatives developed by the European Commission in the field of education and is the final joint evolution of other minor and prior actions that provide schools and teachers with funding to carry out international mobility projects with a variety of formative activities. The benefits of carrying out international mobility activities to strengthen student learning and teacher training are well known and have been researched or reported even from the early stages of a program that was born back in the 1980s but has always been focused on the university level. When considering teachers at early levels (schools and high schools), the 2014–2020 Erasmus+ program was the main source of funding to grant Spanish teachers permanent training activities abroad with a direct positive impact on their careers. The year 2020 is the last year of the first evolution of the Erasmus+ program, which has been renewed, extended, and strengthened for a new six-year term (2021–2027). However, 2020 has also been a significant year. The COVID-19 global pandemic continues to affect the mobility of citizens within the different territories of the union and, thus, have a direct negative impact on international teacher and student mobility. Being 2020 the end of a cycle and a critical moment, it is the perfect time to conduct an analysis of the data associated with the participation of teachers and schools in Spain, their perceptions of the program, the different activities carried out, and the impact of the pandemic. This research study is based on an analysis of an opinion survey through a nationwide sample of teachers participating in KA101 Erasmus+ projects. This paper gathers and presents data and conclusions using information previously not available that most of the time is published in official reports globally without considering the particularities of the different states of the European Union.

scholarly journals The use of social networking sites and their relation to the behavior of the university student: استخدام مواقع التواصل الاجتماعي وعلاقتها بالسلوك الانحرافي لدى الطالب الجامعي

2017 ◽  
Vol 1 (5) ◽  
Author(s):  
Djeboub Walid
Keyword(s):  
Adverse Effects ◽  
Social Networking ◽  
Social Networking Sites ◽  
Deviant Behavior ◽  
Negative Impact ◽  
Sampling Technique ◽  
Simple Random Sampling ◽  
The University ◽  
The Impact ◽  
University Community

This study aimed to show the extent of teenagers who represent students Tèbessa University contents of violence and crime that is seen or published or traded them through the media and communication affected, especially through social networking sites and networks, such as Facebook and stringing YouTube and Skype, etc., which may contribute to the formation and strengthening of behaviors negative in these through the following problem: Do you contribute to social networking sites through the implications of violence and crime in a negative impact on the behaviors of the students within the university community ?, also deliberately researcher to sample the estimated inventory of 50 students schooled at the Faculty of Economics and Commercial Sciences and Management Sciences of each section by an estimated 10% of the study population as a whole's (2000) the adoption of simple random sampling technique, the results have also been addressing the adoption system (SPSS) , Which resulted in the results: the presence of a statistically significant correlation between the students' use of social networking sites and the spread of deviant behavior within the university community?, And no statistically significant differences in the adverse effects of the use of social networking sites on the behavior of students depending on the sex variable, the largest of any female average for the benefit of, No statistically significant differences in the adverse effects of the use of social networking sites on the behavior of students depending on the variable physical level ?,No statistically significant differences in the adverse effects of the use of social networking sites on the behavior of the students due to the level of scientific student ?,The study also called attention to the recent media study the impact of the implications of violence and crime across social networking on the behavior of young people and adolescents sites, spreading awareness programs to help solve the problems of this phenomenon.

Effect of Potato virus Y on Yield of Three Potato Cultivars Grown Under Different Nitrogen Levels

Plant Disease ◽  
2006 ◽  
Vol 90 (1) ◽  
pp. 73-76 ◽  
Author(s):  
Jonathan L. Whitworth ◽  
Phil Nolte ◽  
Chris McIntosh ◽  
Robert Davidson
Keyword(s):  
Potato Virus ◽  
Potato Virus Y ◽  
Total Yield ◽  
Russet Burbank ◽  
Yield Reduction ◽  
Symptom Expression ◽  
Russet Norkotah ◽  
Nitrogen Levels ◽  
Foliar Symptoms ◽  
Significant Yield

Previous studies have shown that Potato virus Y (PVY) reduces yield in many cultivars. Typical foliar symptoms can include veinal necrosis, leaf drop, and a mosaic pattern sometimes accompanied by leaf roughness. Infection by PVY in Russet Burbank produces identifiable PVY symptoms, whereas cv. Russet Norkotah expresses mild, almost latent symptoms. Yield also is influenced by nitrogen fertilizer levels. This research was conducted to determine whether increased nitrogen mitigates yield reduction caused by PVY. Russet Norkotah, CO80011-5, and Russet Burbank were used in replicated plots of non-PVY-infected and PVY-infected plants at three nitrogen levels in 1995 and 1996. There was a significant yield reduction between PVY-negative and PVY-positive plots in all cultivars, at most nitrogen levels. PVY yield reduction was similar (approximately 38%) in the mild symptom expression clones of Russet Norkotah and CO80011-5, whereas the yield reduction in Russet Burbank, which exhibits typical symptom expression, was 63.5%. We conclude that increased nitrogen can influence total yield, but does not significantly mitigate the yield reduction due to PVY infection.

Effect of Potato Virus Y on Yield of a Clonal Selection of Russet Norkotah

2010 ◽  
Vol 87 (3) ◽  
pp. 310-314 ◽  
Author(s):  
Jonathan L. Whitworth ◽  
Phillip B. Hamm ◽  
Chris S. McIntosh
Keyword(s):  
Potato Virus ◽  
Potato Virus Y ◽  
Clonal Selection ◽  
Russet Norkotah ◽  
Selection Of

scholarly journals Strain-Specific Hypersensitive and Extreme Resistance Phenotypes Elicited by Potato virus Y Among 39 Potato Cultivars Released in Three World Regions Over a 117-Year Period

Plant Disease ◽  
2018 ◽  
Vol 102 (1) ◽  
pp. 185-196 ◽  
Author(s):  
Roger A. C. Jones ◽  
Stuart J. Vincent
Keyword(s):  
Potato Virus ◽  
Potato Virus Y ◽  
Secondary Infection ◽  
Potato Cultivars ◽  
Symptom Expression ◽  
Extreme Resistance ◽  
Potato Plants ◽  
Pvy Resistance ◽  
World Regions ◽  
Healthy Seed

Strain-specific hypersensitive (HR) and extreme resistance (ER) phenotypes elicited in potato plants by three Potato virus Y (PVY) isolates in strain groups PVYO (BL and DEL3) and PVYD (KIP1) were studied. PVYO and PVYD isolates elicit HR genes Ny or putative Nd, respectively, and all three isolates elicit ER gene Ry. They were inoculated to 39 Australasian, European, or North American potato cultivars released over a 117-year period and harvested tubers were replanted. Both primary and secondary symptoms were recorded. Two European cultivars always developed ER following sap and graft inoculation and, thus, carried comprehensive PVY resistance gene Ry. One Australasian and two European cultivars always developed susceptible phenotypes and, thus, lacked genes Ry, Ny, and putative Nd. Sap inoculation with isolate KIP1 elicited localized HR (LHR) in 31 cultivars and both LHR and systemic HR (SHR) in three others; thus, all carried putative Nd. Isolates BL and DEL3 both elicited susceptible phenotypes in 11 of these 34 cultivars but LHR alone, SHR alone, or both LHR and SHR in the other 23 which, therefore, all carry Ny. With these two isolates, SHR expression ranged from very severe to very weak, with the greatest numbers of isolate–cultivar combinations occurring in the severe category with BL (n = 11) and moderate category (n = 12) with DEL3. Within the same isolate–cultivar combination, overall, SHR symptom expression was weaker with secondary than primary infection. With both primary and secondary infection, SHR expression was most severe with KIP1 and weakest with DEL3. Genes Ny and putative Nd were present in cultivars released between 1939 and 2010 or 1893 and 2010, respectively, occurring in cultivars from all three world regions. These findings have important implications concerning breeding new PVY-resistant potato cultivars, especially for countries lacking healthy seed potato stocks, or where subsistence farmers cannot afford them. An alternative to including gene Ry is incorporating as many strain-specific PVY resistance genes as possible.

scholarly journals Negative Social Interaction and Psychological Well-Being on Female Basketball Athletes

2021 ◽  
Vol 10 (2) ◽  
pp. 61-65
Author(s):  
Zulfa Nur Umniyah ◽  
Berliana Berliana ◽  
Boyke Mulyana ◽  
Geraldi Novian
Keyword(s):  
Social Interaction ◽  
Social Interactions ◽  
Social Exchange ◽  
Negative Impact ◽  
Well Being ◽  
Psychological Well Being ◽  
Negative Effect ◽  
Negative Social Interactions ◽  
The University ◽  
The Impact

Exercise can maintain a person's level of psychological well-being or also known as Psychological well-being (PWB), but on the other hand, it can also have a negative effect. Negative Social Interaction is one of the factors that have a negative effect on individuals from their environment during exercise. In terms of gender, women and sports are interrelated even though women have long been underestimated in sports, especially in sports that are considered masculine sports. This study examines the negative social interactions experienced by athletes in basketball. In basketball, negative social interactions can occur due to the assumption that basketball is a masculine sport, besides, that women are considered weaker than men. So this study aims to analyze the impact of Negative Social Interaction obtained by female basketball athletes on the Psychological well-being (PWB) of athletes. The instruments used were Negative Social Exchange (NSE) and Psychological Well-being Scale questionnaires as well as short interviews given to 24 female basketball athletes at the University of Indonesia Education. The results showed that NSI had a significant relationship with the PWB of female basketball athletes. The coach is one individual who plays a very important role in the condition of the athlete's PWB. Not only can it have a negative impact, but NSI can also be turned into a motivation that can encourage athletes to fight harder in the future. The author provides suggestions for coaches who handle female basketball athletes to be more careful when interacting with athletes and for basketball connoisseurs to better organize themselves in expression when enjoying this sport.

scholarly journals The Impact of COVID-19 Pandemic on Higher Education and Research: Learning from Experience and the Way Forward

2021 ◽  
Vol 1 (2) ◽  
Author(s):  
Ahmad Bashawir Abdul Ghani ◽  
Nor Idayu Mahat ◽  
Mohd Faizal Omar ◽  
Shahbani Abu Bakar
Keyword(s):  
Negative Impact ◽  
Movement Control ◽  
Holistic Approach ◽  
Learning And Teaching ◽  
Work From Home ◽  
First Case ◽  
Face To Face Learning ◽  
The Government ◽  
The University ◽  
The Impact

The COVID-19 pandemic took its toll on many countries in early 2020 after the first case was reported in China at the end of 2019. Malaysia was not spared either and the Government was forced to take a bold yet drastic measure in implementing the Movement Control Order (MCO) in earnest on 18 March 2020. The measure, akin to a lockdown, practically forced all forms of socio-economics and socio-educational activities to come to an abrupt stop. Schools, institutions of higher learning and training centers were directed to close its doors to students. Universiti Utara Malaysia (UUM) had to abruptly implement contingency plans in the wake of the negative impact brought about by the pandemic. Almost all academic activities had to be reorganized when majority of the students opted to return to the safety of their home environment, and the staff were required to work from home in compliant with the MCO. This development necessitated the University to introduce the remote learning mode in place of the traditional face to face learning and teaching (T&L). Various other strategies and measures were also introduced by the University which required reprioritization of tasks and determining possible risks that could impede normal daily operations. UUM opted for a holistic approach to address the impending concerns and to ensure the continuity of the education process and to address the wellbeing of its staff who are forced to work from home.

scholarly journals How far is too far? An analysis of students’ perceptions of the impact of distance between university and family home on academic performance

2017 ◽  
Vol 10 (15) ◽  
pp. 28-40
Author(s):  
Rosalina Pisco Costa ◽  
Carlos Vieira ◽  
Isabel Vieira
Keyword(s):  
Academic Performance ◽  
Undergraduate Students ◽  
Online Survey ◽  
Negative Impact ◽  
Two Dimensions ◽  
Family Home ◽  
Socially Relevant ◽  
The University ◽  
Work Done ◽  
The Impact

AbstractTransition to university is a challenging phase in youngsters’ lives. The literature indicates that geographical distance separating the places of study and of family residence adds to the difficulties of transition and adjustment to university. Recent evidence suggests that it also negatively impacts students’ grades. Despite important work done by economists, geographers and psychologists, sociology has devoted scarce interest in understanding this topic. This article seeks to bridge this gap, specifically exploring the reasons justifying the largely ignored effect of distance between the university and family home in academic performance. The study draws on data on undergraduate students of a Portuguese public university, collected through an online survey. Two dimensions, one more related to practical life occupations and another more linked to personal feelings and activities, are examined. It is argued that the negative impact of distance is mainly due to homesickness and to the time spent traveling home. Results from such analysis are twofold socially relevant: of the utmost importance for families, academics and students’ support services, deserve to be seriously considered by policy makers deciding on the territorial distribution of higher-education institutions.

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