scholarly journals AFLP Comparisons Among Claviceps africana Isolates from the United States, Mexico, Africa, Australia, India, and Japan

Plant Disease ◽  
2002 ◽  
Vol 86 (11) ◽  
pp. 1247-1252 ◽  
Author(s):  
Paul W. Tooley ◽  
Erin D. Goley ◽  
Marie M. Carras ◽  
Nichole R. O'Neill
Keyword(s):  
United States ◽  
Genetic Diversity ◽  
Fragment Length Polymorphism ◽  
Genetic Relationships ◽  
The United States ◽  
The Other ◽  
Population Subdivision ◽  
Future Studies ◽  
Claviceps Africana ◽  
United States Mexico

Eighty-seven isolates of the sorghum ergot pathogen, Claviceps africana, from diverse geographic locations were analyzed using four different amplified fragment length polymorphism (AFLP) primer combinations to determine genetic relationships among isolates. Most isolates showed unique AFLP haplotypes, indicating that substantial genetic variation is present within C. africana populations. Two major groupings of isolates were observable, with ca. 70% similarity between the two groups. One group consisted of Australian, Indian, and Japanese isolates and the other of U.S., Mexican, and African isolates. In spite of overall high levels of genetic diversity observed in C. africana, isolates within the two major groups were between 75 and 100% similar. The observed associations of C. africana isolates from worldwide sources could be the result of intercontinental trade and/or movement of seed. The data indicate that Africa was the likely source of C. africana that has become established in the Americas since 1996. Analysis of additional isolates in future studies will reveal whether these groupings are being maintained or whether population subdivision or reshuffling may occur.

scholarly journals Assessment of Diversity in Claviceps africana and Other Claviceps Species by RAM and AFLP Analyses

2000 ◽  
Vol 90 (10) ◽  
pp. 1126-1130 ◽  
Author(s):  
Paul W. Tooley ◽  
Nichole R. O'Neill ◽  
Erin D. Goley ◽  
Marie M. Carras
Keyword(s):  
United States ◽  
South Africa ◽  
Genetic Diversity ◽  
Puerto Rico ◽  
Fragment Length Polymorphism ◽  
The United States ◽  
Aflp Analysis ◽  
Indian Isolates ◽  
Claviceps Africana ◽  
Primer Sets

Genetic diversity among isolates of Claviceps africana, the sorghum ergot pathogen, and isolates of other Claviceps spp. causing ergot on sorghum or other hosts, was analyzed by random amplified microsatellite (RAM) and amplified fragment length polymorphism (AFLP) analyses. Of the RAM primer sets tested, one revealed polymorphism in C. africana isolates, with Australian and Indian isolates possessing a unique fragment. AFLP analysis, in addition to clearly distinguishing Claviceps spp., revealed polymorphisms in C. africana. A group of isolates from the United States, Puerto Rico, and South Africa exhibited 95 to 100% similarity with one another. Several isolates from Isabela, Puerto Rico were 100% similar to an isolate from Texas, and another isolate from Puerto Rico was identical with one from Nebraska. Australian and Indian isolates showed greater than 90% similarity with isolates from the United States., Puerto Rico, and South Africa. A number of polymorphisms existed in the United States group, indicating that the recently introduced population contains multiple genotypes. Isolates of C. sorghicola, a newly described sorghum pathogen from Japan, were very distinct from other species via RAM and AFLP analyses, as were isolates from outgroups C. purpurea and C. fusiformis. Both RAM and AFLP analysis will be useful in determining future patterns of intercontinental migration of the sorghum ergot pathogen, with the AFLP method showing greater ability to characterize levels of intraspecific variation.

Genetic Diversity of Wild Oat (Avena fatua)Populations from China and the United States

Weed Science ◽  
2007 ◽  
Vol 55 (2) ◽  
pp. 95-101 ◽  
Author(s):  
Runzhi Li ◽  
Shiwen Wang ◽  
Liusheng Duan ◽  
Zhaohu Li ◽  
Michael J. Christoffers ◽  
...  
Keyword(s):  
United States ◽  
Genetic Diversity ◽  
Gene Diversity ◽  
Genetic Relationships ◽  
The United States ◽  
Mantel Test ◽  
Wild Oat ◽  
Chinese Populations ◽  
Nei's Distance ◽  
The Impact

Weed genetic diversity is important for understanding the ability of weeds to adapt to different environments and the impact of herbicide selection on weed populations. Genetic diversity within and among six wild oat populations in China varying in herbicide selection pressure and one population in North Dakota were surveyed using 64 polymorphic alleles resulting from 25 microsatellite loci. Mean Nei's gene diversity (h) for six wild oat populations from China was between 0.17 and 0.21, and total diversity (HT) was 0.23. A greater proportion of this diversity, however, was within (Hs= 0.19) rather than among (Gst= 0.15) populations. For the wild oat population from the United States,h= 0.24 andHT= 0.24 were comparable to the values for the six populations from China. Cluster analysis divided the seven populations into two groups, where one group was the United States population and the other group included the six Chinese populations. The genetic relationships among six populations from China were weakly correlated with their geographic distribution (r= 0.22) using the Mantel test. Minimal difference in gene diversity and small genetic distance (Nei's distance 0.07 or less) among six populations from China are consistent with wide dispersal of wild oat in the 1980s. Our results indicate that the wild oat populations in China are genetically diverse at a level similar to North America, and the genetic diversity of wild oat in the broad spatial scale is not substantially changed by environment, agronomic practices, or herbicide usage.

scholarly journals Genetic diversity among proso millet (Panicum miliaceum) biotypes assessed by AFLP technique

2004 ◽  
Vol 22 (2) ◽  
pp. 167-174 ◽  
Author(s):  
D. Karam ◽  
P. Westra ◽  
S.J. Nissen ◽  
S.M. Ward ◽  
J.E.F. Figueiredo
Keyword(s):  
United States ◽  
Genetic Diversity ◽  
Cluster Analysis ◽  
Fragment Length Polymorphism ◽  
The United States ◽  
Cultivated Plants ◽  
Panicum Miliaceum ◽  
Proso Millet ◽  
Upgma Cluster Analysis ◽  
Aflp Technique

The Amplified Fragment Length Polymorphism (AFLP) technique was used to access genetic diversity between three domestic and nine wild proso millet biotypes from the United States and Canada. Eight primer combinations detected 39 polymorphic DNA fragments, with the genetic distance estimates among biotypes ranging from 0.02 to 0.04. Colorado-Weld County black seeded and Wyoming-Platte County were the most distinct biotypes according to the dissimilarity level. A UPGMA cluster analysis revealed two distinct groups of proso millet without any geographic association. Six weed biotypes exhibiting some characters of cultivated plants were grouped together with domesticated biotypes of proso millet while the three typical wild phenotypes were clearly clustered into another group according to AFLP markers.

Introduction

2019 ◽  
pp. 1-26
Author(s):  
Frances R. Aparicio
Keyword(s):  
United States ◽  
Latin American ◽  
Sense Of Belonging ◽  
Personal Narrative ◽  
The United States ◽  
The Other ◽  
Urban Centers ◽  
Future Studies ◽  
Heterogeneous Processes ◽  
The One

I begin by identifying Intralatino/a writers and characters nationwide whose voices claim the need for their public acknowledgement and recognition. I define Intralatino/as as embodying multiple Latin American nationalities and ethnicities, and anticipate for the reader the heterogeneous processes through which they negotiate their nationalities and reaffirm a sense of belonging and non-belonging within their family lives. By unveiling the temporality of Intralatino/a identities—that they are not new nor exceptional, but hidden in histories marked by segmented national frameworks—I argue for the need to render these subjectivities visible and public, and worthy of academic analysis. In terms of methodology, I highlight the tensions between, on the one hand, personal narrative, the anecdote, and poetry, which frame my reading of the twenty interviews that inform the book, and, on the other, the sociological impetus for categorizing and for identifying patterns and structures. I locate this book project centrally within the field of Latinx Studies amid questions of culture, identity, hybridity, and transnationalism. I also discuss Chicago as a city of Latinidad and highlight the ways in which the analysis paves the way for future studies about Intralatino/as in other Latino urban centers in the United States.

scholarly journals Cicinnus chambersi: a new species of sack-bearer moth (Lepidoptera, Mimallonidae, Cicinninae) from southeastern Arizona, USA

ZooKeys ◽  
2020 ◽  
Vol 931 ◽  
pp. 49-71
Author(s):  
Ryan A. St Laurent ◽  
Lawrence E. Reeves ◽  
Akito Y. Kawahara
Keyword(s):  
United States ◽  
New Species ◽  
The United States ◽  
The Other ◽  
Type Locality ◽  
Sky Islands ◽  
Future Studies ◽  
History Of ◽  
The Common ◽  
A New Species

A new species of cicinnine Mimallonidae, Cicinnus chambersisp. nov., is described from the Sky Islands Region of southern Arizona, USA. The new species is closely related to C. mexicana (Druce), type locality Veracruz, Mexico, based on morphology and genetics. The other Cicinnus species known from the United States, the common C. melsheimeri (type locality Pennsylvania, USA) is morphologically and genetically distinct from both C. chambersi and C. mexicana. The new species is compared to C. mexicana and C. melsheimeri, as well as other Mexican Cicinnus. The life history of C. chambersi is unknown, but its description should facilitate future studies on this rarely reported North American mimallonid, a species which may have only recently become established in the United States. Cicinnus chambersi is the fifth known Mimallonidae species from the United States, and the first described from the country in nearly half a century.

Working With Interpreters to Support Students Who Are English Language Learners

2016 ◽  
Vol 1 (16) ◽  
pp. 15-27 ◽  
Author(s):  
Henriette W. Langdon ◽  
Terry Irvine Saenz
Keyword(s):  
United States ◽  
English Language Learners ◽  
Language Learners ◽  
English Language ◽  
First Language ◽  
The United States ◽  
The Other ◽  
Primary Language ◽  
Second Best ◽  
Support Students

The number of English Language Learners (ELL) is increasing in all regions of the United States. Although the majority (71%) speak Spanish as their first language, the other 29% may speak one of as many as 100 or more different languages. In spite of an increasing number of speech-language pathologists (SLPs) who can provide bilingual services, the likelihood of a match between a given student's primary language and an SLP's is rather minimal. The second best option is to work with a trained language interpreter in the student's language. However, very frequently, this interpreter may be bilingual but not trained to do the job.

Armed Violence in the Ideology of Contemporary Islamic Fundamentalism - Study models

2019 ◽  
Vol 2 (4) ◽  
pp. 237
Author(s):  
Laith Mzahim Khudair Kazem
Keyword(s):  
United States ◽  
United States Of America ◽  
The United States ◽  
The Other ◽  
Islamic Fundamentalism ◽  
Islamic Movements ◽  
Important Means ◽  
Armed Violence ◽  
Goals And Objectives ◽  
At Home

The armed violence of many radical Islamic movements is one of the most important means to achieve the goals and objectives of these movements. These movements have legitimized and legitimized these violent practices and constructed justification ideologies in order to justify their use for them both at home against governments or against the other Religiously, intellectually and even culturally, or abroad against countries that call them the term "unbelievers", especially the United States of America.

Can India Balance China in Asia?

2017 ◽  
Author(s):  
Jonathan Holslag
Keyword(s):  
United States ◽  
Central Asia ◽  
Economic Reforms ◽  
The United States ◽  
The Other ◽  
Military Power ◽  
Regional Power ◽  
Political Fragmentation ◽  
Strong Interest ◽  
The One

The chapter argues that India has a strong interest to balance China and that the two Asian giants will not be able grow together without conflict. However, India will not be able to balance China’s rise. The chapter argues that India remains stuck between nonalignment and nonperformance. On the one hand, it resists the prospect of a new coalition that balances China from the maritime fringes of Eurasia, especially if that coalition is led by the United States. On the other hand, it has failed to strengthen its own capabilities. Its military power lags behind China’s, its efforts to reach out to both East and Central Asia have ended in disappointment, and its economic reforms have gone nowhere. As a result of that economic underachievement, India finds itself also torn between emotional nationalism and paralyzing political fragmentation, which, in turn, will further complicate its role as a regional power.

The Proximity of Other Skins

2019 ◽  
Author(s):  
Celine Parreñas Shimizu
Keyword(s):  
United States ◽  
South Korea ◽  
The United States ◽  
The Philippines ◽  
The Other ◽  
The West ◽  
Pain And Suffering ◽  
The Spectator ◽  
Existing Frames ◽  
The Voice

Transnational films representing intimacy and inequality disrupt and disgust Western spectators. When wounded bodies within poverty entangle with healthy wealthy bodies in sex, romance and care, fear and hatred combine with desire and fetishism. Works from the Philippines, South Korea, and independents from the United States and France may not be made for the West and may not make use of Hollywood traditions. Rather, they demand recognition for the knowledge they produce beyond our existing frames. They challenge us to go beyond passive consumption, or introspection of ourselves as spectators, for they represent new ways of world-making we cannot unsee, unhear, or unfeel. The spectator is redirected to go beyond the rapture of consuming the other to the rupture that arises from witnessing pain and suffering. Self-displacement is what proximity to intimate inequality in cinema ultimately compels and demands so as to establish an ethical way of relating to others. In undoing the spectator, the voice of the transnational filmmaker emerges. Not only do we need to listen to filmmakers from outside Hollywood who unflinchingly engage the inexpressibility of difference, we need to make room for critics and theorists who prioritize the subjectivities of others. When the demographics of filmmakers and film scholars are not as diverse as its spectators, films narrow our worldviews. To recognize our culpability in the denigration of others unleashes the power of cinema. The unbearability of stories we don’t want to watch and don’t want to feel must be borne.

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