Virus Diseases of Cereal Crops in South Dakota

Virus diseases of wheat, oats and barley have been reported from various parts of the world during the last three decades. In some instances viruses have proven be the real causes diseases formerly attributed to other agents. The earliest reports of a virus disease of wheat concerned a mosaicrosette disease first observed in southeastern Illinois in 1919. The disease caused by a soil-borne virus was later found in a number of localities in the eastern half of the United States, but to date it has not been reported west of the Missouri River. However, other mosaic disease of wheat have been observed on wheat in California. Reports from foreign countries indicate the occurrence of soil-borne mosaics in Japan and Egypt, and a leafhopper-transmitted virus causing a mosaic of wheat in western Russia. The virus diseases reported on oats include a soil-borne mosaic of winter oats in Alabama and Carolinas, and a leafhopper-transmitted virus in Siberia. Barley has also been infected with certain viruses. False stripe, which has long been considered a non-parasitic disease of barley, was recently shown to be caused by a virus which is seedborne. In 1951 an aphid-transmitted disease of barley named “yellow dwarf” was discovered in California. In the fall of 1949 experimental work was begun on virus diseases affecting cereal crops in South Dakota. The diseases that have been studied so far include wheat streak mosaic , wheat striate mosaic, barley false stripe, and Agropyron streak mosaic. The results of investigations on the distribution, transmission and host range of these diseases are presented

La danse des fantômes à la cour Suprême du Canada: les droits autochtones pendant le premier quart de siècle de l'article 35 de la loi constitutionnelle, 1982

Titre de la page de titre additionnel: Ghost dancing at the Supreme Court of Canada : indigenous rights during the First quarter century of s.35.of Canada's Constitution Act, 1982.Certains supposent que la Loi constitutionnelle de 1982, donc la section 35(1) reconnait les droits existants des peuples autochtones, a complété la décolonisation du Canada. Par contre, malgré le passage d'un quart de siècle, plusieurs Autochtones estiment que la Cour suprême continue à nier l'existence de leurs droits. Cette étude examine cette problématique en formulant des définitions juridiques du « colonialisme » et du « post colonialisme ». Vu le remplacement de l'idéal de «la loi» comme «commande », promu par le juriste anglais John Austin au dernier siècle, par l'idéal du consensus populaire et démocratique, nous avons vécu une changement important dans le droit euro-canadien. Mais, selon la théorie des paradigmes de Thomas Kuhn, la continuation des anciennes habitudes est une partie normale du processus de changement, qui n'est jamais complète sans l'émergence de nouveaux modèles et procédures. Pour déterminer la situation de la Cour suprême du Canada par rapport au processus de décolonisation, la Partie I de cette étude examine le fonctionnement paradigmatique autant que le phénomène colonial, la décolonisation en droit international et le postcolonialisme pour identifier les indicateurs du paradigme colonial autant que le paradigme postcolonial. La Partie II adapte ce cadre analytique aux raisonnements de la Cour suprême du Canada concernant les droits autochtones protégés par l’article 35 (1) de la Loi constitutionnelle de 1982. Cette double analyse coloniale/postcoloniale démontre la persistance des anciennes habitudes malgré la reconnaissance des idéaux postcoloniaux par la Cour. Les juges sont conscients des limites institutionnelles qui restreignent leur capacité de protéger les droits autochtones, mais plusieurs concepts qui structurent leur raisonnement perpétuent la dynamique coloniale. Une réflexion approfondie des juges, des praticiens et des peuples autochtones sur les problèmes qui découlent des changements paradigmatiques doit faciliter la tolérance mutuelle qui est un préalable aux ententes qui sont nécessaires selon les idéaux égalitaires qui sont partages par tous.Many people believe that Canada became fully decolonized in 1982 with the "patriation" instituted by the Constitution Act, 1982, whose s.35 (1) explicitly recognized and affirmed "existing Aboriginal and treaty rights". Yet, a quarter century later, Indigenous critics continue to complain that their rights are being denied by the Supreme Court of Canada. This study has approached such questions by drawing on international law to establish legal definitions for "colonialism" and "postcolonialism". In this optic, it becomes clear that there has been a significant change in Euro-Canadian norms during the past century. Colonial concepts, like the English jurist John Austin's definition of "law" as "command" have been superseded by the ideal of informed, popular consent, yet modes of conduct that are consistent with the colonial paradigm persist. According to Kuhn's theory of scientific revolutions this is predictable because changes from one paradigm to another are normally characterized by intensified assertions of the impugned orthodoxy and no change is complete until new models and procedures have emerged to replace established habits. In order to determine where the Supreme Court of Canada actually stands in relation to the decolonization process, Part I of this study examines the nature of paradigmatic function, including the metaphoric construction of language. It then reviews the colonial phenomenon, the emergence of decolonization in international law and postcolonialism to define the colonial and postcolonial paradigms in terms of specific indicia that can be used to classify institutional performance. Part II adapts this analytical framework to the specific circumstances of judicial decision making and applies it to the reasoning of over 60 Supreme Court of Canada cases concerned with section 35 (1) of the Constitution Act, 1982. This dual colonial/postcolonial analysis makes it possible to identify some of the ways in which colonial metaphors and modes of thought have persisted during the past quarter century despite the Court's firm commitment to postcolonial ideals. Though the judges themselves are aware of some of the institutional limitations that constrict their ability to validate Indigenous rights, many of the concepts that structure their reasoning induce them to perpetuate the colonial paradigm. Further reflection on the structure of our rational processes and on the problems predictably associated with paradigm change might make it easier for judges, practitioners and Indigenous peoples to develop the agreements that are necessary to implement the egalitarian ideals ascribed to by all

Resistance to Wheat streak mosaic virus identified in synthetic wheat lines

Citation: Shoup Rupp, J. L., Simon, Z. G., Gillett-Walker, B., & Fellers, J. P. (2014). Resistance to Wheat streak mosaic virus identified in synthetic wheat lines. Retrieved from http://krex.ksu.eduWheat streak mosaic virus (WSMV) is an important pathogen in wheat that causes significant yield losses each year. WSMV is typically controlled using cultural practices such as the removal of volunteer wheat. Genetic resistance is limited. Until recently, no varieties have been available with major resistance genes to WSMV. Two resistance genes have been derived from Thinopyrum intermedium through chromosome engineering, while a third gene was transferred from bread wheat through classical breeding. New sources of resistance are needed and synthetic wheat lines provide a means of accessing genetic variability in wheat progenitors. A collection of wheat synthetic lines was screened for WSMV resistance. Four lines, 07-SYN-27, -106, -164, and -383 had significant levels of resistance. Resistance was effective at 18 °C and virus accumulation was similar to the resistant control, WGGRC50 containing Wsm1. At 25 °C, resistance was no longer effective and virus accumulation was similar to the susceptible control, Tomahawk

Practitioner\u27s Guide to Technology, Pedagogy, and Content Knowledge (TPACK): Rich Media Cases of Teacher Knowledge

The goal of the TPACK Practitioners Guide is simple--to offer exemplary cases of technology integration efforts that result in curriculum-based student learning in each of the following nine content areas and grade level contexts: Elementary Science, Elementary Math, Elementary Social Studies, Elementary Reading, Middle School Language Arts, Secondary Science, Secondary Math, Secondary Social Studies, and, Secondary English.https://scholarworks.wm.edu/book/1000/thumbnail.jp

Editorial: Implementing the Teacher Education Initiative

Representatives from ten specialty professional associations affiliated with the National Technology Leadership Coalition (NTLC) are collaborating with Microsoft Corporation to develop an innovative professional development opportunity for teacher educators—the Teacher Education Initiative (TEI). The goal of the initiative is to enhance preparation of future teachers to use technology in effective ways to teach students across grades and academic disciplines. This effort builds upon initiatives such as Preparing Tomorrow’s Teachers to Use Technology (PT3) and Microsoft’s Partners in Learning (PIL) program. The goals of TEI are described in more detail in a previously published overview, “Preparing Teachers for Tomorrow’s Technologies” (Dilworth et al., 2012). The current article describes planned implementation strategies designed to advance more effective integration of technology in teacher preparation. TEI is grounded in the framework of technology, pedagogy, and content knowledge (TPACK; referred to as technological pedagogical content knowledge in Mishra & Koehler, 2006). Representatives of teacher education associations from a number of academic disciplines have assumed responsibility for the development of teacher education resources for each discipline. Representatives from associations related to special education, instructional technology, and teacher education at large are developing resources for non-discipline-specific teacher educators. In order to facilitate a systematic, coordinated approach within each TEI college or university representatives from the American Association of Colleges for Teacher Education (AACTE) are developing related materials for the leaders of schools, colleges and departments of teacher education