1,721,145 research outputs found
Wheat Breeding through Genetic and Physical Mapping
Full text linkThe Special Issue of “Wheat breeding through genetic and physical mapping” aimed to collect recent advances in research on the genetic and physical mapping of quantitative trait loci (QTLs), candidate genes and regulatory sequences involved in the control of wheat’s important agronomic traits, such as grain yield and quality, biotic and abiotic stress resistance [...
CARATTERIZZAZIONE MOLECOLARE DI UNA POPOLAZIONE DI "BACHCROSS INBRED LINES" DERIVATA DALL'INCROCIO FRUMENTO DURO X VAR. DICOCCOIDES
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New Breeding Technologies in Grasses
Full text linkPlant breeding is continuously evolving to develop new cultivars with the desired traits in the most efficient way [...
Identification of QTLs with a key role in resistance against Fusarium Head Blight in durum wheat
No full textDurum wheat (T. turgidum ssp. durum) is one of most susceptible cereals to
Fusarium head blight (FHB, scab) which is annually responsible for serious
economic threats due to huge losses in yield, and for decay in qualitative
characteristics of the grain (destruction of cell walls, alteration of the
lipid fraction and the reduction of the protein fraction). FHB is also
responsible to produce mycotoxins mainly deoxynivalenol (DON), a powerful
inhibitor of eukaryotic protein synthesis and very harmful to human and
animal health. The most effective strategy to manage FHB disease and gain a
more economically and ecologically sustainable wheat production is the use
of genetic resistance, which is controlled by the combined effects of
several quantitative trait loci (QTL) and environment.
Resistance to FHB is a complex and quantitative trait controlled by
multiple genes, largely influenced by plant architecture and genotypeenvironment interactions, and characterized by large genetic variation in
wheat gene pool. Resistance to FHB is of quantitative nature and its
inheritance includes many genes and is affected by environmental
conditions.
Cell wall is the first line of plants defense against fungal pathogens and
several lines of evidence indicate that structural components of the cell
wall are involved in plant resistance against such pathogens. Understanding
the biological mechanisms and associated biomarkers driving wheat
development and adaptation relies on an urgent understanding of the
continuum between structural, expressional and epigenetic variations. A
specific activity has been conducted for Fusarium Head Blight (FHB),
reported QTL identification and the map-based cloning of a new FHB QTL
located on 2A chromosome from a resistant bread wheat line deriving from
Sumai 3. New functional marker genes conferring durable plant resistance
against Fusarium were developed and efficiently used in a marker-assisted
selection program for the constitution of resistant superior durum wheat
genotypes to be used for a sustainable agriculture and food security
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Caratterizzazione di linee quasi isogeniche di frumento duro contenenti un segmento cromosomico per l'elevato contenuto proteico introgresso dalla varietà selvatica dicoccoides
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