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Characterization of durum wheat genetic resources and evaluation under Cyprus conditions
No full textΟ γενετικός χαρακτηρισμός γενετικών πόρων αποτελεί σημαντική προϋπόθεση για την
βελτιστοποίηση των στρατηγικών διατήρησης γενετικού υλικού και την αξιοποίηση του
σε προγράμματα βελτίωσης. Η φαινοτυπική αξιολόγηση κάτω από διαφορετικά
περιβάλλοντα επιτρέπει την εκτίμηση της παραλλακτικότητας για σημαντικά αγρονομικά
και φυσιολογικά χαρακτηριστικά και τον υπολογισμό των συσχετίσεων τους με την
απόδοση. Οι τεχνολογίες υψηλής απόδοσης, όπως η τηλεπισκόπηση, έχουν αποκτήσει
ιδιαίτερο ενδιαφέρον για τη φαινοτύπηση φυτών επειδή είναι γρήγορες και φτηνές
μέθοδοι. Οι κύριοι στόχοι αυτής της διδακτορικής διατριβής ήταν: (1) ο γενετικός
χαρακτηρισμός 55 καταχωρήσεων σκληρού σιταριού, συμπεριλαμβανομένων μοντέρνων
ποικιλιών από διαφορετικά προγράμματα βελτίωσης και παραδοσιακών ποικιλιών
προερχόμενων από την Κύπρο και άλλες περιοχές της Μεσογείου με μικροδορυφόρους,
(2) η αξιολόγηση 20 μοντέρνων ποικιλιών για απόδοση και άλλα σημαντικά αγρονομικά
χαρακτηριστικά κάτω από διαφορετικές εδαφο-κλιματικές συνθήκες, και (3) η
αξιολόγηση της χρησιμότητας μεθόδων υψηλής απόδοσης τηλεπισκόπησης για μαζική
φαινοτύπηση κάτω από ένα ξηρό και θερμό περιβάλλον.
Οι μικροδορυφόροι κατέδειξαν την ύπαρξη μεγάλης γενετικής παραλλακτικότητας. Οι
παραδοσιακές ποικιλίες δημιούργησαν ξεχωριστές ομάδες και παρουσίασαν μεγαλύτερη
γενετική παραλλακτικότητα από τις μοντέρνες ποικιλίες ενισχύοντας τη δυνατότητα
αξιοποίησης τους στα προγράμματα βελτίωσης. Η μεγαλύτερη γενετική
παραλλακτικότητα παρατηρήθηκε στις κυπριακές παραδοσιακές ποικιλίες
υποδεικνύοντας την πιθανή ύπαρξη μοναδικής ποικιλομορφίας εντός αυτής της γενετικής
δεξαμενής. Μεγάλη γενετική παραλλακτικότητα παρατηρήθηκε και εντός της κυπριακής
παραδοσιακής ποικιλίας «Κυπερούντα». Η γενετική ποικιλομορφία ήταν μεγαλύτερη
εντός των καταχωρήσεων που διατηρούνται ως ξεχωριστές γραμμές προερχόμενες από
ένα στάχυ. Η γενετική διαφοροποίηση των καταχωρήσεων της «Κυπερούντας» και η
διαφορετική κατάταξη των καταχωρήσεων με ίδιο όνομα στην ανάλυση συστάδων
υποδεικνύει ότι τα δεδομένα συλλογής δεν είναι αξιόπιστος τρόπος για περιορισμό
διπλών δειγμάτων.
Η φαινοτυπική αξιολόγηση κατέδειξε την ύπαρξη σημαντικής γενετικής
παραλλακτικότητας για όλα τα χαρακτηριστικά που εξετάστηκαν, παρόλα αυτά, για τα περισσότερα η επίδραση του περιβάλλοντος ήταν μεγαλύτερη. Παρατηρήθηκαν
στατιστικά σημαντικές συσχετίσεις μεταξύ του αριθμού σπόρων ανά τ.μ. και της
απόδοσης στα περισσότερα περιβάλλοντα και οι συσχετίσεις ήταν μεγαλύτερες στα δύο
περιβάλλοντα με τη χαμηλότερη απόδοση. Ο αριθμός σπόρων ανά στάχυ ήταν το
χαρακτηριστικό που συστηματικά συσχετιζόταν σημαντικά με τον αριθμό σπόρων ανά
τ.μ. Παρατηρήθηκαν επίσης αρνητικές συσχετίσεις μεταξύ των συστατικών απόδοσης.
Οι ποικιλίες είχαν διαφορετικές στρατηγικές διαμόρφωσης της απόδοσης. Οι δύο
ποικιλίες με την μεγαλύτερη παραγωγή είχαν το μεγαλύτερο αριθμό γόνιμων αδελφιών
ανά τ.μ. σε συνδυασμό με ψηλό αριθμό σπόρων ανά στάχυ, ή βάρος χιλίων κόκκων,
αντίστοιχα. Οι ποικιλίες διέφεραν μεταξύ τους ως προς την πλαστικότητα τους για τα
περισσότερα χαρακτηριστικά. Σε ορισμένες περιπτώσεις, παρατηρήθηκαν σημαντικές
συσχετίσεις μεταξύ των πλαστικοτήτων των ποικιλιών ή μεταξύ των πλαστικοτήτων και
των μέσων όρων των ποικιλιών για διαφορετικά χαρακτηριστικά.
Παρατηρήθηκαν στατιστικά σημαντικές διαφορές μεταξύ των ποικιλιών για τους Δείκτες
Βλάστησης υπολογιζόμενους με ανάλυση φωτογραφίας προερχόμενη από μη
επανδρωμένα σκάφη. Σε ορισμένες περιπτώσεις, η απόδοση συσχετιζόταν σημαντικά με
τους δείκτες βλάστησης. Οι συσχετίσεις ήταν θετικές ή αρνητικές υποδεικνύοντας ότι οι
περιβαλλοντικές συνθήκες κατά τη διάρκεια του γεμίσματος του σπόρου μπορούν να
επηρεάσουν το πρόσημο των συσχετίσεων. Η υπολογιστική ικανότητα της απόδοσης των
Δεικτών Βλάστησης επηρεάστηκε από τη διαφορετική φαινολογία των ποικιλιών. Οι
συσχετίσεις της απόδοσης με τους Δείκτες Βλάστησης ήταν μεγαλύτερες όταν οι
συσχετίσεις του χρόνου ξεσταχυάσματος με τους Δείκτες Βλάστησης ήταν μικρότερες ή
μη σημαντικές. Τα αποτελέσματα αναδεικνύουν την δυνατότητα χρήσης των Δεικτών
Βλάστησης, υπολογιζόμενοι από φωτογραφία προερχόμενη από μη επανδρωμένα σκάφη,
για φαινοτύπηση σκληρού σιταριού σε Μεσογειακά περιβάλλοντα χαμηλής απόδοσης.Breeders need to intensify their efforts to meet the challenges arising from the growing
population and from climate change. Genotypic characterization, phenotypic evaluation
and exploitation of high throughput technologies will be crucial in order to achieve their
goals. The main objectives of this doctoral dissertation were (1) to characterize a set of
55 durum wheat accessions, including modern varieties from different breeding programs
and landraces originated from Cyprus and other Mediterranean areas using
microsatellites, (2) to evaluate a subset of twenty modern varieties for grain yield and
other important agronomic traits under diverse climatic conditions, and (3) to evaluate the
usefulness of high throughput, remote sensing techniques for plant phenotyping under a
water limited and heat stressed environment.
High genetic diversity was detected. Landraces formed distinct groups and depicted
higher genetic variability than modern varieties reinforcing their potential use to plant
breeding. The highest genetic variability was observed in Cypriot landraces suggesting
the existence of unique genetic diversity within this genepool. High genetic diversity was
also detected in Cypriot landrace ''Kyperounda''. The genetic diversity was higher in
accessions conserved as sublines. The genetic differentiation between ''Kyprerounda''
accessions and the different clustering of landrace accessions conserved under the same
name signifies that passport data is not a reliable method to eliminate duplicates in
genebanks.
Phenotypic evaluation revealed the existence of genetic diversity for all the traits,
however, for most of them the highest percentage of variance was explained by the
environmental effect. In most cases, number of seeds per m2 was significantly correlated
with grain yield and the correlations were stronger in the low yielding environments.
Number of seeds per spike was the trait consistently related with number of seeds per m2.
Trait offs between yield components were recorded. Varieties had different yield
formation strategies. The two highest yielding varieties had the highest number of fertile
tillers per m2 combined with high number of seeds per spike or high kernel weight. The
differences between varieties for plasticity were significant for yellow pigment content,
protein content, gluten index, growing degree days to heading, thousand kernel weight and plant height. In some cases, significant correlations were found between plasticities
and between plasticities and the traits per se.
Statistically significant differences between varieties were observed for Spectral
Vegetation Indices derived by Unmanned Aerial Vehicle imagery. Grain yield was
significantly correlated with SVIs, when recorded at early reproductive stages. Both
positive and negative correlations were observed indicating that the environmental
conditions during grain filling can affect the sign of the correlations. The predictive ability
of SVIs was affected by plant phenology. Correlations of grain yield with SVIs were
stronger as the correlations of SVIs with heading were weaker or not significant. These
findings highlight the potential use of SVIs derived by UAV imagery for durum wheat
phenotyping at low yielding Mediterranean conditions.Complete
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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