1,721,150 research outputs found
Segregation at the SCN resistance locus rhg1 in soybean is distorted by an association between the resistance allele and reduced field emergence
No full textSegregation distortion has been reported repeatedly in soybean (Glycine max [L.] Merr.) inbred line populations segregating for the soybean cyst nematode (SCN) (Heterodera glycines Ichinohe) resistance gene rhg1. In each reported case, the frequency of the SCN resistance allele at the rhg1 locus was lower than expected. Segregation distortion was studied in 51 F-4 populations by counting the number of plants predicted to be homozygous resistant, susceptible, and heterozygous for rhg1 based on the genetic markers Satt309, CTA, or TMA5. Significant (P < 0.05) segregation distortion was observed in 44 out of the 51 F-4 populations. When the heterozygotes were ignored, there were significantly fewer homozygous-resistant plants than expected in 33 populations. To study whether differential field emergence was a cause of the segregation distortion, three near isogenic line (NIL) populations segregating at the rhg1 locus for SCN resistance from plant introduction 88788 were tested. Population sizes ranged from 32 to 44 NILs and emergence was determined in field experiments in three environments. In each population, SCN-resistant NILs had significantly (P < 0.05) less field emergence than susceptible NILs. In the population with the greatest effect, field emergence of resistant NILs was 6% less than susceptible NILs, with the entire population having an average emergence rate of 46%. Equations were derived to describe the effect of selection on segregation ratios over generations of population development and the observed emergence rates were transformed into fitness factors. Depending on assumptions of gene action, it was predicted from these fitness factors that segregation distortions were in the range of those reported previously for the rhg1 locus and were similar to what was observed on average across the 51 F-4 populations. While other factors might also be involved, the results suggest that reduced field emergence associated with the SCN resistance allele contributes to previously reported segregation distortion at the rhg1 locus
MA076 Haussuchung : Wie verhältst Du Dich? ; [Ratschläge f. richtige Ausübung Deiner Rechte] / [Gerhard Obuch]
Get PDF標題紙裏によれば、赤色救済会(Roten Hilfe)が以前に発行したパンフレット「プロレタリアは法廷でどのように自己弁護するか」・「簡易法廷でのあなたの弁護」の補足として発行された。T.p. verso explains this pamphlet's history on publication as follows: Die nachstehende Schrift ist eine Ergänzuné zu den bisherigen von der Roten Hilfe herausgefebenen Schriften „Wie verteidigt sich der Proletarier vor Gericht" und „Deine Verteidigung vor dem Schnellgericht". (The following text is a supplement to the previous texts published by the Red Aid "How the Proletarian Defends Himself in Court" and "Your Defense in the Summary Court")14 p. ; 23 cmboo
MA076 Haussuchung : Wie verhältst Du Dich? ; [Ratschläge f. richtige Ausübung Deiner Rechte] / [Gerhard Obuch]
No full text14 p. ; 23 c
sj-pdf-1-avb-10.1177_17581559211036582 – Supplemental material for Winter diet of Long-eared Owls (Asio otus) in the southern Pannonian Plain (Serbia, Vojvodina)
No full textSupplemental material, sj-pdf-1-avb-10.1177_17581559211036582 for Winter diet of Long-eared Owls (Asio otus) in the southern Pannonian Plain (Serbia, Vojvodina) by Filip Tulis, Nadja Poljak, Milan Ruzic and Ján Obuch in Avian Biology Research</p
Effect of crop improvement on genetic diversity in oilseedBrassica rapa (turnip-rape) cultivars, detected by SSR markers
No full textWith the improvement of seed quality, Brassica rapa oilseed germplasm went through 2 major breeding bottlenecks during the introgression of genes for zero erucic acid content and low glucosinolate content, respectively. This study investigates the impact of these bottlenecks on the genetic diversity in European winter B. rapa by comparing 3 open-pollinated cultivars, each representing a different breeding period. Diversity was estimated on 32 plants per cultivar, with 16 simple sequence repeat (SSR) markers covering each of the B. rapa linkage groups. There was no significant loss of genetic diversity over the 3 cultivars as indicated by allele number (ranging from 59 to 55), mean allele number (from 3.68 to 3.50), Shannon information index (from 0.94 to 0.87) and expected heterozygosity (from 0.53 to 0.48). About 83% of the total variation was attributed to within-cultivar variation, and the remaining 17% to between-cultivar variation by analysis of molecular variance (AMOVA). Individual plants were separated into the 3 cultivars by principal coordinate analysis (PCoA). In conclusion, genetic diversity within cultivars was high and quality breeding in B. rapa did not significantly reduce the genetic diversity of B. rapa winter cultivars, so there is no risk of decline in performance due to quality improvement
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Preparing dihydroxyacetone, useful e.g. in cosmetic composition, comprises cultivating microorganisms in growth medium, adjusting pH of the medium, contacting cells with a base and culturing the microorganism in presence of carbohydrates
No full textMARX A, Li LI, OBUCH JURAJ, HAAS THOMAS, Wendisch VF. Preparing dihydroxyacetone, useful e.g. in cosmetic composition, comprises cultivating microorganisms in growth medium, adjusting pH of the medium, contacting cells with a base and culturing the microorganism in presence of carbohydrates. 12.11.2009
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