Resistance Allele Movement between Imazamox-Resistant Wheat and Jointed Goatgrass (Aegilops cylindrica) in Eastern Oregon Wheat Fields

Weed Science ◽  
2015 ◽  
Vol 63 (4) ◽  
pp. 855-863 ◽  
Author(s):  
Bianca A. B. Martins ◽  
Luna Sun ◽  
Carol Mallory-Smith
Keyword(s):  
Management Practices ◽  
Management Practice ◽  
Natural Occurrence ◽  
Resistance Allele ◽  
Wheat Varieties ◽  
Aegilops Cylindrica ◽  
Wheat Field ◽  
Jointed Goatgrass ◽  
Two Factors ◽  
Resistance Trait

Imazamox-resistant wheat varieties carry theImi1allele, which confers resistance to the imidazolinone (IMI) herbicide imazamox. This resistance trait allows the selective control of jointed goatgrass, a difficult-to-control winter annual grass weed. Allele movement between IMI-resistant wheat and jointed goatgrass may occur via hybridization and backcross events. Hybrids (F1) of IMI-resistant wheat and jointed goatgrass were identified in 2008 in a commercial wheat field in Eastern Oregon. In 2009 and 2010, surveys were conducted in Eastern Oregon to determine the prevalence of theImi1allele in wheat × jointed goatgrass hybrids. Using polymerase chain reaction assays we detected the presence of theImi1allele. A total of 128 sites were surveyed over the 2 yr. Of 1,548 plants sampled, 1,100 were positive for theImi1alelle and of those, 1,087 were heterozygous and 13 were homozygous for the allele. We assessed hybrid yield components and how these components varied across the sampled sites. The association between the proportion of IMI-resistant hybrids and the area or management practice in the commercial fields was determined. Nonagricultural sites or production of IMI-resistant wheat in consecutive years were two factors associated with a greater proportion of IMI-resistant hybrids. Our results demonstrate that theImi1allele is moving from IMI-resistant wheat to jointed goatgrass, producing resistant hybrids and backcross plants. This is the first report of natural occurrence of IMI-resistant backcross plants in commercial wheat fields. Therefore, it is important to implement field management practices that reduce IMI-resistant hybrid production and to effectively manage nonagricultural areas with jointed goatgrass infestations to prevent introgression of the IMI-resistance allele.

Production of herbicide-resistant jointed goatgrass (Aegilops cylindrica) × wheat (Triticum aestivum) hybrids in the field by natural hybridization

Weed Science ◽  
1998 ◽  
Vol 46 (6) ◽  
pp. 632-634 ◽  
Author(s):  
Steven S. Seefeldt ◽  
Robert Zemetra ◽  
Frank L. Young ◽  
Stephen S. Jones
Keyword(s):  
Management Strategies ◽  
Natural Hybridization ◽  
Efficacy Study ◽  
Wheat Seed ◽  
Aegilops Cylindrica ◽  
Herbicide Resistant ◽  
Jointed Goatgrass ◽  
Hybrid Plants ◽  
Resistance Trait ◽  
Viable Seeds

Imazamox-resistant hybrids resulted from a cross between jointed goatgrass and an imazamox-resistant wheat (cv. FS-4 IR wheat). Two imazamox-resistant hybrids were discovered in a research plot where FS-4 IR wheat seed had been replanted from the harvest of an imazamox efficacy study conducted the year before at a different location. These hybrid plants survived imazamox applied at 0.053 and 0.069 kg ai ha−1in the field and produced seven viable seeds (BC1). This seed germinated, and chromosomes were counted from the roots (2N number ranged from 39 to 54). In the greenhouse, six of the seven plants survived an application of 0.072 kg ai ha−1imazamox, which confirmed that the resistance trait had been passed to these progeny. A large amount of phenotypic variation was observed in the mature BC1plants. A genetic description of the movement of the resistant gene is proposed based on the case of the gene being located on the D and the A or B genomes. Management strategies to reduce the occurrence of herbicide-resistant hybrids are presented.

Jointed goatgrass (Aegilops cylindrica): A Review

Weed Science ◽  
2018 ◽  
Vol 66 (5) ◽  
pp. 562-573 ◽  
Author(s):  
Carol Mallory-Smith ◽  
Andrew R. Kniss ◽  
Drew J. Lyon ◽  
Robert S. Zemetra
Keyword(s):  
Gene Flow ◽  
Research Program ◽  
Management Practices ◽  
Production Systems ◽  
Integrated Management ◽  
Crop Rotations ◽  
Seeding Density ◽  
Wheat Cultivars ◽  
Aegilops Cylindrica ◽  
Jointed Goatgrass

AbstractIn 1994, the National Jointed Goatgrass Research Program was initiated with funding from a special USDA grant. The 15-yr program provided $4.1 million to support jointed goatgrass (Aegilops cylindricaHost.) research and technology transfer projects in 10 western states. These projects resulted in approximately 80 refereed manuscripts, including journal articles and extension publications. The research covered various topics related to the biology and ecology of jointed goatgrass as well as its management and control in wheat (Triticum aestivumL.) production systems. This review summarizes the research on jointed goatgrass published after Donald and Ogg’s 1991 review, most of which was conducted as part of the USDA-funded National Jointed Goatgrass Research Program. Specific topics that were studied and reviewed here includeA. cylindricagenetics, especially as it relates to gene flow and hybridization rates with wheat and fertility of the resulting hybrids; vernalization requirements; seed dormancy, longevity, and germination requirements; competitiveness with wheat; and herbicide resistance acquired through evolution or gene flow from wheat. With respect to management, a wide variety of practices were evaluated, including various tillage types and frequencies; crop rotations, especially diversified wheat production systems that include spring-seeded annual crops; competitive wheat cultivars, seeding dates, seeding density, and row spacing; fertility management, including nitrogen application timing and placement; and field burning. Finally, many studies evaluated the use of herbicides, especially the introduction of imazamox in imidazolinone-resistant wheat cultivars, as well as comparison of adjuvant systems and application timings. In addition to the many management practices that were studied individually, several integrated management systems were evaluated that combined crop rotations, tillage, and herbicide programs. Between 1993 and 2013, weed scientists in 14 western states estimated that jointed goatgrass infestations decreased by 45% to 55% and attributed the reduction to the implementation of more diverse crop rotations, improved cultural practices, and use of imazamox-resistant wheat technology. This is evidence that the practical implications of the National Jointed Goatgrass Research Program have been successfully implemented by growers throughout the western United States.

Talented Employees in Russian and Foreign Companies

2013 ◽  
pp. 147-156 ◽  
Author(s):  
M. Latukha ◽  
T. Tsukanova
Keyword(s):  
Management Practices ◽  
Management Practice ◽  
Talent Management ◽  
Foreign Companies ◽  
Study Results ◽  
Practice Development

The study investigates talent management practices in Russian and foreign companies. The inquiry of Russian and foreign companies (working in Russia) showed that perceived and dedicated talent management practices contribute to better companies performance. The study results can be used in talent management practice development.

The inseparable nature of working and learning: peripheral management practice that facilitates employee learning

2014 ◽  
Vol 28 (5) ◽  
pp. 10-12 ◽  
Author(s):  
Jay Andrew Cohen
Keyword(s):  
Management Practices ◽  
Management Practice ◽  
Point Of View ◽  
Management Activity ◽  
Content Type ◽  
Employee Learning ◽  
Frontline Managers ◽  
Social Act ◽  
Practical Implications ◽  
Good Manager

Purpose – This paper aims to look at the peripheral management practice that facilitates employee learning. Such management practices are embedded or inseparable to working and being a good manager. Design/methodology/approach – Point of view. Findings – For many frontline managers and their employees, the separation between working and learning is often not apparent. There appears to be no clear distinction between when they are working and when they are learning. Practical implications – Better development of organizational managers. Originality/value – This paper highlights the informal nature of learning and working and builds on the understanding that much of the learning that occurs at work occurs as part of a social act, often involving managers and their employees. In this way, employee learning that is identified and facilitated by frontline managers is so often entwined in other management activity. Furthermore, this paper outlines some practical actions that organizations can undertake to aid greater frontline management involvement in employee learning.

A snapshot of general practitioner attitudes, levels of confidence and self-reported paediatric asthma management practice

2011 ◽  
Vol 17 (3) ◽  
pp. 288 ◽  
Author(s):  
Jessica A. Roydhouse ◽  
Smita Shah ◽  
Brett G. Toelle ◽  
Susan M. Sawyer ◽  
Craig M. Mellis ◽  
...  
Keyword(s):  
General Practitioners ◽  
Management Practices ◽  
Inhaled Corticosteroids ◽  
Management Practice ◽  
Controlled Trial ◽  
Asthma Management ◽  
Convenience Sample ◽  
Paediatric Asthma ◽  
Baseline Questionnaire ◽  
Practitioner Attitudes

The prevalence of asthma in Australia is high. Previous findings have suggested that asthma management, particularly in primary care, remains suboptimal and recent government initiatives to improve asthma management and encourage the use of written asthma action plans (WAAPs) in general practice have been implemented. We aimed to assess the attitudes, confidence and self-reported paediatric asthma management practices of a convenience sample of Australian general practitioners (GPs). A baseline questionnaire was administered to GPs as part of a randomised controlled trial. General practitioners (GPs) were recruited from two areas of greater metropolitan Sydney, NSW between 2006 and 2008. Invitations were sent to an estimated 1200 potentially eligible GPs. Of 150 (12.5%) GPs that enrolled, 122 (10.2%) completed the baseline questionnaire. Though 89% were aware of the Australian National Asthma Guidelines, less than 40% were familiar with guideline recommendations. While 85.2% had positive attitudes towards WAAPs, only 45.1% reported providing them frequently. For children with frequent symptoms, 90% agreed they should prescribe daily, inhaled corticosteroids (ICS), and 83% reported currently prescribing ICS to such patients. These findings indicate gaps between GP attitudes and behaviours and highlights opportunities for interventions to improve paediatric asthma management.

Survey on weedy rice (Oryza spp.) management practice and adoption of Clearfield® rice technology in Peninsular Malaysia

Weed Science ◽  
2021 ◽  
pp. 1-7
Author(s):  
Masilamany Dilipkumar ◽  
Muhammad Saiful Ahmad-Hamdani ◽  
Hairazi Rahim ◽  
Tse Seng Chuah ◽  
Nilda Roma Burgos
Keyword(s):  
Agricultural Development ◽  
Management Practices ◽  
Management Practice ◽  
Educational Programs ◽  
Peninsular Malaysia ◽  
Weedy Rice ◽  
Rice Farmers ◽  
Development Area ◽  
Adoption Level ◽  
Main Factor

Abstract A total of 452 rice farmers from three main granary areas of Muda Agricultural Development Authority (MADA), Kemubu Agricultural Development Authority (KADA), and Integrated Agricultural Development Area Barat Laut Selangor (IADA BLS) were surveyed in 2019. The goal was to determine farmers’ knowledge of and management practices for weedy rice (Oryza spp.) as well as the adoption level of Clearfield® rice technology (CRT) in Malaysia. Most farmers (74%) were adept at recognizing weedy rice. The majority of farmers (77%) perceived transplanting and water seeding rice systems as the best options to manage weedy rice, while only 10% of the farmers adopted CRT. The low level of adoption of this technology was due to several constraints, including the high cost of the CRT package and occurrence of imidazolinone (IMI)-resistant weedy rice in their farms. Farmers from MADA and IADA BLS reported the occurrence of IMI weedy rice in their farms for more than nine planting seasons, whereas those from KADA reported having resistant weedy rice for five to six planting seasons. The main factor contributing to the evolution of IMI-resistant weedy rice was ignorance about the technology and deliberate disregard of stewardship guidelines. The survey revealed that there is a need to increase awareness about CRT through training and educational programs for proper adoption of this technology.

ASSESSMENT OF SOIL MANAGEMENT PRACTICES OF FARMERS IN ZARIA LOCAL GOVERNMENT AREA, KADUNA STATE, NIGERIA

2021 ◽  
Vol 5 (1) ◽  
pp. 411-417
Author(s):  
Salamatu Suleiman ◽  
Usman Kibbon Adamu ◽  
Jibril Abdullahi
Keyword(s):  
Local Government ◽  
Management Practices ◽  
Management Practice ◽  
Soil Management ◽  
Sampling Technique ◽  
Animal Manure ◽  
Local Government Area ◽  
Extension Agents ◽  
Soil Management Practice ◽  
Set Up

This study examined the soil management practices of farmers in Zaria Local Government Area, Kaduna state, Nigeria. Both primary and secondary means of data collection were employed in the study. Purposive sampling technique was used to select both the study locations and the respondents based on the characteristics of the population and the objectives of the study. The sample size of 384 copies of questionnaire was purposively used to acquire data from the selected respondents. This was analyzed in SPSS 2.0 version, using simple descriptive statistics such as frequencies, percentages and mean derived from 4-point Likert scale. The study indicated that the most adopted soil management practice by the respondents was the use of animal manure with 28.1%. This is followed by Mixed Cropping (26.3%). while shifting cultivation is the least practice (1.7%). The results also revealed that manure application is the most effective soil management practice with a mean score of ( = 4.21). while the lowest mean score is zero tilling with a value of ( = 1.51). Findings also showed that Soil fertility depletion is the strongest challenge to soil management practices with 32.9%.  The paper concludes that farmers in the study area can adopt many soil management practices. The paper recommends that there is need for mobile advisory teams of agricultural extension agents and the N-power agro unit to be set up, equipped, mobilized to reach out farmers to increase their awareness on adoption of improved agro soil management practices through training and consultation with farmers.

An Investigation of Credit Risk Management Strategies of Private Commercial Banks of Bangladesh

2014 ◽  
Vol 2 (2) ◽  
pp. 77-87
Author(s):  
Abu Hanifa Md. Noman ◽  
Md. Amzad Hossain ◽  
Sajeda Pervin
Keyword(s):  
Risk Management ◽  
Credit Risk ◽  
Commercial Banks ◽  
Management Practices ◽  
Management Practice ◽  
Management Strategies ◽  
Third Party ◽  
Primary Data ◽  
Credit Risk Management ◽  
Risk Management Strategies

Objective - The study aims to investigate credit risk management practices and credit risk management strategies of the local private commercial banks in Bangladesh. Methodology -The investigation is conducted based on primary data collected from a set of both closed end and open end questionnaire from 23 out of 39 local private commercial banks in Bangladesh. Descriptive statistics has been used in processing the data and interpreting the results. Findings - The results reveal that credit risk management practice of the sample banks is sound which is attributed to the appropriate implementation of Basel II and credit risk management guidelines the country's central bank. The findings further show that use of Credit risk grading is most popular and effective criteria for measuring the borrowing capacity of the borrowers. In order to control credit risk and preventing losses from credit exposure banks give more focus on collateralization, accurate loan pricing and third party guarantee. Loan is monitored properly and credit reminder is given to the client if principal and interest remain outstanding for three months. The study further reveals that lack of experienced and trained credit officers, lack of genuine market information and Lack of awareness regarding non-genuine borrower are the most important problems of current credit risk management practices in Bangladesh. Novelty - To the best of the knowledge of the authors the study is the first that investigates credit risk management strategies of private commercial banks, especially on Bangladesh. Type of Paper - Empirical Keyword : Bangladesh; Commercial Bank; Credit risk; Credit risk management; Credit risk management strategies.

scholarly journals The Relationship between Sport Organizational Management Practices and Coaching Leadership Style of Primer League Football Clubs in Ethiopian

2018 ◽  
Vol 7 (1) ◽  
pp. 25-31
Author(s):  
Biruk Hundito ◽  
N Vijay Mohan
Keyword(s):  
Data Analysis ◽  
Leadership Style ◽  
Management Practices ◽  
Management Practice ◽  
Organizational Management ◽  
Football Clubs ◽  
Leadership Behaviour ◽  
Significant Difference ◽  
Coaching Leadership ◽  
The Relationship

The major purpose of this study was to investigate the relationship between sport organizational management practices and coaching leadership style of Ethiopian primer league football clubs. To this end descriptive survey method were employed. The data collected by two Questionnaires the first one from sport organizational management practices and the second one Leadership Scale for Sport (LSS) from selected football club players. Assess the validity and reliability of the questionnaires by areas of professional expertise. The target population of this study were all 14 Ethiopian primer league football club players. Based on Ethiopian football federation rules and regulations 25 players registered for one year computation 25x14(N=350).The researcher selected only 4(28.57%) top two and bottom tow clubs from 2015/2016 computation year by using purposive sampling techniques. The total number of participants in this study was 4x25(N=100). The research approach applied for this study were quantitative approach in nature. The Statistical Package for Social Science (SPSS) version 20 used for data analysis Depending on the nature of the basic questions, appropriate statistical techniques such as mean, standard deviation, ANOVA (analysis of variance) ,and Pearson correlation were used for data analysis. The level of significance is set at 0.05. The researcher assumption/hypothesis was: - There is no significant difference in sport organizational management practices, Perceive and Prefer of coaching leadership behaviour of player’s indices in Ethiopian premier league football clubs. The study findings indicated that, there is significant difference between clubs and sport organizational management practice, there is significant difference between clubs and perceive coaching leadership style and there is no significant difference between clubs and prefer coaching leadership style. Finally there was positive relationship in sport organizational management practice, perceive and prefer of coaching leadership behaviour.

scholarly journals BUSINESS RISK MANAGEMENT PRACTICES ADOPTED BY ENTREPRENEURS FOR BUSINESS SUCCESS IN DELTA STATE

2021 ◽  
pp. 1-7
Author(s):  
Samuel Ikelegbe ◽  
Romanus Udeh
Keyword(s):  
Risk Management ◽  
State Government ◽  
Management Practices ◽  
Management Practice ◽  
Business Management ◽  
Business Owners ◽  
Business Success ◽  
Business Risk ◽  
Level Of Significance ◽  
Structured Questionnaire

The study was a survey research; it focused on determining the extent entrepreneurs adopt risk management practices for business management practice in Delta State. The population of the study comprises of 860 business owners who are registered with the Ministry of Commerce and Industries in Delta State. The instrument for data collection was a structured questionnaire with 16 items. Data collected were analyzed using mean and Standard deviation. The null hypothesis was tested using ANOVA statistics at 0.05 level of significance. Findings from the investigation revealed that entrepreneurs in Delta State do not adopt business risk management practices in managing their businesses. It was recommended among others that the Delta State Government and Ministry of Commerce and Industries should sensitize business owners on business risk management practice to enhance business success.

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