2,169 research outputs found

    Registration of N614, A3N615, N616, and N617 Shattercane Genetic Stocks with Cytoplasmic or Nuclear Male Sterility and Juicy or Dry Midribs

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    Four shattercane [Sorghum bicolor subsp. drummondii (Nees ex Steud.) de Wet ex Davidse] genetic stocks—N614 (Reg. No. GS-652, PI 665684), A3N615 (Reg. No. GS-651, PI 665683), N616 (Reg. No. GS-653, PI 665685), and N617 (Reg. No. GS-654, PI 665686)—with A3 cytoplasmic male sterility or the nuclear male sterility gene ms3 containing either juicy (dd) or dry (DD) culms were developed jointly by the USDA-ARS; the Iowa Agricultural and Home Economics Experiment Station, College of Agriculture and Life Sciences, Iowa State University; and the Agricultural Research Division, Institute of Agriculture and Natural Resources, University of Nebraska. The stocks were released in July 2011. The source material for these genetic stocks was isolated from an archetypical shattercane population found near Lincoln, NE. Release of these genetic stocks makes available shattercane lines with both A3 cytoplasmic male sterility, and ms3 genetic (nuclear) male sterility to facilitate crossing. These genetic stocks also contain juicy (dd) or dry (DD) culms, a visible genetic marker to facilitate screening progeny resulting from crosses. The genetic stocks have immediate application for basic research involving gene flow from cultivated sorghum [Sorghum bicolor (L.) Moench] to shattercane and on the fitness of offspring resulting from such crosses

    Are Australian pre-service physical education teachers prepared to teach inclusive physical education?

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    Abstract: Australian pre-service physical education (PE) teachers must be prepared for the reality of teaching in inclusive classrooms. Past studies have indicated that the amount of academic preparedness can affect pre-service PE teachers’ intentions to successfully teach in inclusive settings. The current study measured these intentions in a sample of pre-service PE teachers from two different universities. This modified survey required participants to respond to two separate scenarios: one teaching inclusive PE to a student with attention deficit hyperactivity disorder, and one to a student with autism. All participants completed an adapted PE unit with an embedded practicum of different lengths. Findings indicated that pre-service teachers’ who experienced the larger adapted PE practicum had more favourable intentions towards teaching students with both disabilities compared to the other cohort. Implications of this research to improve Australian PE teacher training are discussed and recommendations are made

    Physical Educators’ Efficacy in Utilising Paraprofessionals in an Inclusive Setting

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    Inclusion of students with disabilities (SwD) in Australian health and physical education (HPE) classes is on the rise. Reasonable adjustment to assist inclusive practice is often accomplished through the use of teaching assistants, or paraprofessionals. While this practice is commonly understood within the classroom, this approach remains obscure in the HPE setting. The purpose of this study was to explore how Australian HPE teachers utilise paraprofessionals when teaching SwD in inclusive environments. HPE teachers (N=14) completed an online questionnaire inquiring how paraprofessionals are being used and the strategies they are using to develop working relationships with paraprofessionals. The HPE teachers in our sample generally had a favourable attitudes towards the paraprofessionals they have worked with, however a lack of appropriate training and HPE curriculum knowledge were highlighted as deficient areas that may have an adverse effect on the overall HPE environment. While the paraprofessionals were recognised as providing a level of support that was generally to the satisfaction of the HPE teachers, the HPE teachers’ consistently provided areas in which the paraprofessional could improve. Strategies to foster this collaborative working relationship were also investigated, and the primary finding dealt with adequate reciprocal communication. With the move toward inclusive practice in Australian public schools this is an area that warrants further investigation so all students can benefit from a healthy and productive HPE

    Registration of N619 to N640 Grain Sorghum Lines with Waxy or Wild-Type Endosperm

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    Sorghum [Sorghum bicolor (L.) Moench] lines N619 to N636 (A lines; Reg. No. GS-699 to GS-716, PI 670134 to PI 670151); N619 to N636 (B lines; Reg. No. GS-721 to GS-738, PI 671777 to PI 671794); and N637 to N640 (R lines; Reg. No. GS-717 to GS-720, PI 670152 to PI 670155) comprise nine pairs of seed parent (A/B) lines, and two pairs of pollinator (R) lines (11 pairs total) that are near-isogenic for waxy (low-amylose) or wildtype endosperm. Breeding work was conducted jointly by the USDA–ARS and the Agricultural Research Division, Institute of Agriculture and Natural Resources, University of Nebraska, and the lines were released in May 2014. Release of these lines makes available two different waxy (wx) alleles (wxa and wxb) for development of grain sorghum as a source of lowamylose starch, whose end use is targeted to the ethanol and food industries. In particular, the release of wx and wild-type near-isogenic pairs facilitates the evaluation of agronomic performance of wx genotypes, and the release of both A/B and R lines facilitates the production of waxy grain hybrids

    Evaluation of Interallelic \u3ci\u3ewaxy\u3c/i\u3e, Hetero\u3ci\u3ewaxy\u3c/i\u3e, and Wild-Type Grain Sorghum Hybrids

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    Four near-isogenic Wheatland x Tx430 grain sorghum [Sorghum bicolor (L.) Moench] hybrids differing in allelic status at the Waxy locus were grown in yield trials to determine their potential to expand existing sources of low-amylose starch. The hypothesis tested was that agronomic performance and grain yield do not differ among hybrid genotypes. Hybrids were generated in a two-by-two factorial design using wxb and wild-type (WT) Wheatland as female parents with wxa and WT Tx430 as male parents. Yield trials were conducted at two Nebraska locations in 2009 and 2010. No differences were observed for field emergence, but grain yield of the interallelic waxy (wxb x wxa) hybrid was 330 kg ha−1 greater than the WT x WT hybrid (P = 0.0482). The wxb x Wx hybrid had the highest grain yield, 633 kg ha−1 greater than the WT (P = 0.0003). Amylose starch content was lowest for wxb x wxa (7.66 g kg−1), intermediate for wxb x Wx and Wx x wxa (25.06 and 27.20 g kg−1, respectively); and highest for WT x WT (34.80 g kg−1) (n = 4, P \u3c 0.0001). The waxy and heterowaxy hybrids evaluated in this study are promising options for commercial production of starches with reduced amylose contents in a drought-tolerant crop

    Bats of Barbados

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    The chiropteran fauna of Barbados includes representatives of four families — Noctilionidae, Phyllostomidae, Vespertilionidae, and Molossidae — including 1 piscivore (Noctilio leporinus), 1 omnivore (Brachyphylla cavernarum), 1 pollenivore/nectarivore (Monophyllus plethodon), 1 frugivore (Artibeus jamaicensis), and 2 insectivorous species (Myotis nyctor and Molossus molossus). Despite an early report, we believe that preponderance of the evidence available at this time is that E. fuscus is not part of the fauna of Barbados. The Barbadian chiropteran fauna of 6 species is much smaller than those on the four neighboring Lesser Antillean islands to the west and north. We believe that this is primarily the result of two factors—geological age and geographic isolation. Our work indicates that populations of the 6 species of bats on Barbados are in good condition in all cases, but only for Artibeus jamaicensis and Molossus molossus are the populations large enough to not be of ongoing concern. The maintenance of the chiropteran fauna can best be served by three management actions — preservation of caves and associated gullies, forests, and hydrological systems

    Bats of Saint Martin, French West Indies/Sint Maarten, Netherlands Antilles

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    Six species of bats have been previously reported from the Antillean island of Saint Martin/Sint Maarten—Artibeus jamaicensis, Brachyphylla cavernarum, Molossus molossus, Tadarida brasiliensis, Noctilio leporinus, and Myotis nigricans nesopolus. Our field research reported herein documents an additional three species of bats from the island for the first time—Monophyllus plethodon, Ardops nichollsi, and Natalus stramineus. Re-examination of the single voucher of Myotis nigricans nesopolus has led us to exclude this species from the fauna of Saint Martin/Sint Maarten. Based on our field research and the study of specimens housed in museum collections, we present information on the eight species of bats that we have documented as occurring on Saint Martin/Sint Maarten. The average rate of fruit bat captures on Saint Martin/Sint Maarten (0.92 bats per net-night— BNN) falls towards the lower end of the range (0.65-2.47 BNN) reported from nearby islands in the northern Lesser Antilles and below the range (2.20-5.93 BNN) reported for mainland populations of Neotropical fruit bats. We discuss possible causes of these decreased population levels and we express some concerns about the future conservation status of the chiropteran fauna of the island

    Bats of Barbados

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    The chiropteran fauna of Barbados includes representatives of four families — Noctilionidae, Phyllostomidae, Vespertilionidae, and Molossidae — including 1 piscivore (Noctilio leporinus), 1 omnivore (Brachyphylla cavernarum), 1 pollenivore/nectarivore (Monophyllus plethodon), 1 frugivore (Artibeus jamaicensis), and 2 insectivorous species (Myotis nyctor and Molossus molossus). Despite an early report, we believe that preponderance of the evidence available at this time is that E. fuscus is not part of the fauna of Barbados. The Barbadian chiropteran fauna of 6 species is much smaller than those on the four neighboring Lesser Antillean islands to the west and north. We believe that this is primarily the result of two factors—geological age and geographic isolation. Our work indicates that populations of the 6 species of bats on Barbados are in good condition in all cases, but only for Artibeus jamaicensis and Molossus molossus are the populations large enough to not be of ongoing concern. The maintenance of the chiropteran fauna can best be served by three management actions — preservation of caves and associated gullies, forests, and hydrological systems

    Bats of St. Vincent, Lesser Antilles

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    The chiropteran fauna of the island of Saint Vincent, represented by 12 species, is among the most complex in the Lesser Antilles, being represented by four families including Noctilionidae (1 species), Mormoopidae (1), Phyllostomidae (8), and Molossidae (2). This fauna includes four trophic guilds as represented by Noctilio leporinus (piscivore/insectivore); Glossophaga longirostris and Monophyllus plethodon (nectarivore/pollenivore); Artibeus lituratus, A. schwartzi, Brachyphylla cavernarum, Ardops nichollsi, and Sturnira paulsoni (frugivore); and Pteronotus fuscus, Micronycteris buriri, Molossus molossus, and Tadarida brasiliensis (insectivore). One species—Micronycteris buriri—and two subspecies—Sturnira paulsoni paulsoni and Ardops nichollsi vincentensis—are endemic to the island. Recent advancements in population genomics have led to the discovery of the reticulated evolutionary history of Artibeus schwartzi and it is likely that the formation of the hybrid evolutionary trajectory of this species is linked with classical island biogeography. The bat fauna of St. Vincent is unique in the West Indies, characterized by being a crossroads for species, an outpost for both northern and southern species, the boundary for a multi-island bat fauna as marked by Koopman’s Line, and a site of endemism. Based on our studies, we place the bat fauna of St. Vincent as the southern-most island in the Lesser Antillean Faunal Core

    Widespread Detection of Antibodies to Eastern Equine Encephalitis, West Nile, St. Louis Encephalitis, and Turlock Viruses in Various Species of Wild Birds from Across the United States

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    Wild birds serve as amplifying hosts for many arboviruses, and are thought to be responsible for introducing these viruses into new areas during migration as well as reintroducing them to places where winter temperatures disrupt mosquito-borne transmission. To learn more about four mosquito-borne arboviruses of concern to human or animal health, we tested sera from 997 wild birds of 54 species and 17 families across 44 states of the United States collected from January 1, 2013, through September 30, 2013. Samples were tested for antibody against eastern equine encephalitis, St. Louis encephalitis, West Nile, and Turlock viruses using plaque reduction neutralization tests with an endpoint of 80% or greater. Of the 333 (33.4%) birds that tested positive for antibody to at least one arbovirus, 29.7% were exposed to two or more arboviruses. Exposure to all four arboviruses was detected in Canada geese, double-crested cormorants, mallards, mute swans, laughing gulls, and American coots. Our results suggest that exposure to arboviruses is widespread in the United States across a diversity of wild bird species
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