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Variability in Ethiopian coriander accessions for agronomic and quality traits
Get PDFCoriander ( Coriandrum sativum L.) is an annual spice herb that
belongs to the family of Umbelliferae/Apiaceae. Although Ethiopia is
known as a primary diversity for coriander, the knowledge on nature and
extent of variation of the indigenous germplasm is limited. Hence, to
address the nature and extent of variability on agronomic and chemical
traits, test trial was conducted at Kokate and Wondo Genet, Southern
Ethiopia, using 49 accessions arranged in randomised complete block
design in two replications during the main season of 2007/08. Data for
15 agronomic and quality traits were measured and statistically tested.
In the combined analysis of variance over locations, accessions varied
significantly in all the traits except for basal leaf number, plant
height and fatty oil contents. The interaction between accessions and
environment was significant for nine of the 15 traits. A range of seed
yield (910-3099 kg ha-1), essential oil (0.25-0.85%) and fatty oil
(11.11-16.53%) content was obtained. Overall, highest value of genetic
coefficient of variation, broad sense heritability and genetic advance
as percent of mean was obtained for longest basal leaf length, days to
start 50% flowering, umbels number/plant, umbellets number/umbel, seed
number/umbellets, seed number/plant, seed yield/ha and essential oil
content.Bien que l’Éthiopie est connue comme étant une
diversité primaire de coriandre ( Coriandrum sativum L.), la
connaissance de la nature et du niveau de variation de son germoplasm
indigène est limitée. Ainsi, pour étudier sa nature et
son niveau de variabilité sur les paramètres agronomiques et
chimiques, un essai était effectué durant la saison 2007-2008
à Kokate et Wondo Genet au sud de l’ Ethiopie, utilisant 49
accessions disposées en blocs complètement randomisés
avec deux répétitions. Les données de 15 paramètres
agronomiques et de qualité ont été mesurées et
statistiquement testées. En faisant l’analyse combinée
de la variance sur les sites, les accessions ont significativement
varié dans tous les paramètres à l’exception du
nombre de feuilles basales, de la hauteur de plants et de la teneur en
huile grasse. L’interaction entre les accessions et
l’environnement a été significative pour neuf des 15
paramètres. Une gamme de rendement en grains (910-3099 kg ha-1),
en huile essentielle (0.25 à 0.85%) et de la teneur en huile
grasse (11.11 à 16.53%) était obtenue. Dans l’ensemble,
la valeur la plus élevée du coefficient de variation
génétique, l’héritabilité au sens large et un
développement génétique avancé comme poucentage de
la moyenne était obtenue pour la longueur de la feuille basale la
plus longue, les jours précédant 50% de la floraison, le
nombre d’ombelles par plant, le nombre d’ombellets par
ombelle, le nombre de grains par ombellets, le nombre de grains par
plant, le rendement en grains par hectare et la teneur en huile
esentielle
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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
Genetic divergence in Ethiopian coriander accessions and its implication in breeding of desired plant types
Get PDFThe genetic divergence among 49 Ethiopian coriander ( Coriandrum
sativum L.) accessions was assessed using employing Mahalanobi's
distance (D2) analysis based on 15 characters. The accessions were
grouped in to eight clusters. Cluster II and III were the largest each
with 12 accessions, followed by clusters I and V each consisting of
seven accessions. The highest inter-cluster distance (480.5) was
observed between clusters I and VIII, followed by clusters V and VIII
(462.2), and then clusters II and VIII (336.1). Hence, crossing between
accessions included in these clusters may give high heterotic response,
and thereby better sergeants. Maximum contribution toward total genetic
divergence was possessed by thousand seed weight (15.67%), followed by
basal leaf number (13.48%), plant height (10.29%), seeds umbellet-1
(9.81%) and umbel number plant-1 (7.84%). Based on means of all
characters, accessions in clusters III, VII and VIII could be regarded
as useful sources of genes for yield and its components, and the
accessions from these clusters, therefore, could be used in improvement
programmes to develop desirable types in coriander.La divergence génétique parmi 49 accessions de coriandre
éthiopienne ( Coriandrum sativum L.) était
évaluée utlisant l'analyse de la distance de Mahalanobi (D2)
basée sur 15 caractères. Les accessions étaient
groupées en huit clusters. Les clusters II et III étaient les
plus larges avec 12 accessions chacun, suivi des clusters I et V avec
sept accessions chacun. La distance la plus élevée entre les
clusters (480.5) était observée entre les clusters I et VIII,
suivi par les clusters V et VIII (462.2) et enfin les clusters II et
VIII (336.1). Ainsi, le croisement entre accessions de ces clusters
pourrait offrir une réponse hétérotique élevée
et par là de meilleurs ségrégants. Une contribution
maximale sur la divergence génétique totale était due au
poids de mille grains (15.67%), suivi par le nombre de feuilles basales
(13.48%), la hauteur de plants (10.29%), grains par inflorescence
(9.81%) et le nombre d'inflorescences par plant (7.84%). Basé sur
les moyennes de tous les caractères, les accessions des clusters
III, IV et VIII pourraient être considérées comme de
sources importantes de gènes pour le rendement et ses composantes,
et les accessions de ces clusters, pourraient parconséquent
être utilisées dans de programmes d'amélioration pour
développer de types désirables dans le coriander
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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