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Author: Tesfay Gebrekirstos Gebremariam Publisher: LAP Lambert Academic Publishing ISBN: 9783659664250 Category : Languages : en Pages : 84
Book Description
Leaf rust (Puccinia triticina Eriks and Henn.) is one of the most important diseases of wheat in Tigray region. Regular surveying, race analysis and searching resistant genes plays significant role to develop resistant varieties against leaf rust. Hence, this study was carried out to determine the distribution and intensity leaf rust, identify physiologic races and evaluate the reaction of commonly growing wheat varieties to virulent races of leaf rust. During the survey,108 farmers' wheat fields and experimental plots were assessed in five districts of Southeastern Tigray, of which 95 (88%) of the fields were affected with leaf rust. The overall mean incidence and severity of the disease were 48.4 and 18.2%, respectively. According to the North American system of nomenclature for P.triticina, characterization of 40 mono pustules resulted in the identification of 22 races. The broadest virulence spectrum was recorded from TKTT race, making all Lr genes except Lr9 ineffective. The variety evaluation revealed that, Mekelle-3, Mekelle-4, Picaflor, Dashin and local showed susceptible reaction to TKTT, THTT and PHTT races
Author: Tesfay Gebrekirstos Gebremariam Publisher: LAP Lambert Academic Publishing ISBN: 9783659664250 Category : Languages : en Pages : 84
Book Description
Leaf rust (Puccinia triticina Eriks and Henn.) is one of the most important diseases of wheat in Tigray region. Regular surveying, race analysis and searching resistant genes plays significant role to develop resistant varieties against leaf rust. Hence, this study was carried out to determine the distribution and intensity leaf rust, identify physiologic races and evaluate the reaction of commonly growing wheat varieties to virulent races of leaf rust. During the survey,108 farmers' wheat fields and experimental plots were assessed in five districts of Southeastern Tigray, of which 95 (88%) of the fields were affected with leaf rust. The overall mean incidence and severity of the disease were 48.4 and 18.2%, respectively. According to the North American system of nomenclature for P.triticina, characterization of 40 mono pustules resulted in the identification of 22 races. The broadest virulence spectrum was recorded from TKTT race, making all Lr genes except Lr9 ineffective. The variety evaluation revealed that, Mekelle-3, Mekelle-4, Picaflor, Dashin and local showed susceptible reaction to TKTT, THTT and PHTT races
Author: Teklay Abebe Publisher: LAP Lambert Academic Publishing ISBN: 9783659153204 Category : Languages : en Pages : 72
Book Description
Wheat stem rust also called black stem rust caused by Puccinia graminis f. sp. tritici is amongst the biotic catastrophic diseases because of its ability to cause complete annihilation of wheat crops over wide areas during epidemic years. The East African highlands in general and Ethiopia in particular is considered as a hot spot area for the development of stem rust complex. The high virulence diversity and evolution rate of the pathogen (like race Ug99) makes a considerable proportion wheat germplasm at risk. This book provides an overview of the significance of wheat stem rust, the virulence diversity and race distribution of the pathogen and its methodological race analysis. Moreover, it entails which resistance genes are effective against the identified races and potential varieties for their current level of resistance to the prevalent and virulent P. graminis f. sp. tritici races. This book is intended for use by field worker engaged in agriculture, plant pathologist, plant breeders, genetics or biotechnology, agricultural research institutions, higher learning institutions (like Universities and colleges) and others engaged in agricultural development.
Author: International Maize and Wheat Improvement Center Publisher: CIMMYT ISBN: 9789686127232 Category : Technology & Engineering Languages : en Pages : 164
Author: RA McIntosh Publisher: CSIRO PUBLISHING ISBN: 0643103023 Category : Technology & Engineering Languages : en Pages : 308
Book Description
Although stem rust has been controlled by means of resistant cultivars, leaf and stripe rust continue as problems for many growing areas of the world. Wheat Rusts: An Atlas of Resistance Genes has been prepared by specialists from one of the leading international laboratories, and illustrates with colour photographs typical resistance phenotypes associated with most known genes for resistance to the three rust diseases of wheat. Relevant details for each gene include chromosome location, aspects of genetics and pathogen variation, the effects of environment on expression, origin, availability in genetic and breeding stocks, and use in agriculture. This atlas includes an introduction to host:pathogen genetics, methodologies for wheat rust research and breeding for resistance.
Author: Stephan Haggard Publisher: Columbia University Press ISBN: 0231140002 Category : Business & Economics Languages : en Pages : 337
Book Description
"In their carefully researched book, Stephan Haggard and Marcus Noland present the most comprehensive account of the famine to date, examining not only the origins and aftermath of the crisis but also the regime's response to outside aid and the effect of its current policies on the country's economic future. Their study begins by considering the root causes of the famine, weighing the effects of the decline in the availability of food against its poor distribution. Then it takes a close look at the aid effort, addressing the difficulty of monitoring assistance within the country, and concludes with an analysis of current economic reforms and strategies of engagement."--BOOK JACKET.
Author: Christopher Wanjek Publisher: International Labour Organization ISBN: 9789221170150 Category : Law Languages : en Pages : 478
Book Description
This volume establishes a clear link between good nutrition and high productivity. It demonstrates that ensuring that workers have access to nutritious, safe and affordable food, an adequate meal break, and decent conditions for eating is not only socially important and economically viable but a profitable business practice, too. Food at Work sets out key points for designing a meal program, presenting a multitude of "food solutions" including canteens, meal or food vouchers, mess rooms and kitchenettes, and partnerships with local vendors. Through case studies from a variety of enterprises in twenty-eight industrialized and developing countries, the book offers valuable practical food solutions that can be adapted to workplaces of different sizes and with different budgets.
Author: Tesfay Gebrekirstos Gebremariam
Author: Tesfay Gebrekirstos Gebremariam
Author: Teklay Abebe
Author: International Maize and Wheat Improvement Center
Author: RA McIntosh
Author: Ashenafi Gedamu-Gobena
Author: Hailu Gebre-Mariam
Author: Alan P. Roelfs
Author: Stephan Haggard
Author: Christopher Wanjek
Author: Amanda Carroll Waterhouse