1,721,052 research outputs found
Genetic interactions of pillar (columnar), compact, and dwarf peach tree genotypes
No full textA study was conducted to determine genetic control of the columnar or pillar (PI) growth habit, and to evaluate
the effects of interactions of various genes that influence peach [Prunus persica (L.) Batsch (Peach Group)] growth habit.
The PI habit (brbr) examined in this study was inherited as a monogenic trait expressing incomplete dominance. The
heterozygous Brbr derived from crosses between standard (ST) and PI genotypes wasrecognized as an upright (UP) tree
with narrower branch angles than ST trees but wider than PI trees. The combination of brbr and brachytic dwarf (DW)
(dwdw) produced dwarf-pillar (DWPI) trees. The effects of the heterozygous Brbr in combination with dw and/or compact
(CT) (Ct) could not be recognized by visual observation. Compact pillar (CTPI) trees resulted from the expression of Ct_
brbr. These trees were distinguished from globe-shaped (GL) trees (Ct_Brbr) by the more upright growth habit of the
CTPI trees. This genetic study highlights the genetic “plasticity” of tree growth habit in peach. The investigation of novel
growth habits extends our concept of the peach tree. Some growth habits such as PI may have commercial potential for
high-density peach production systems. Others, such as PIDW and CTPI may have potential as ornamentals
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
Il miglioramento genetico del pesco : nuove tipologie, extra-stagionalità e resistenza alle principali avversità
No full textWithin the goals of the modern the peach
breeding industry, the search of novel fruits could take
advantage of the wide diversity in flesh texture and
pace of softening, e.g. melting, slow softening melting
(as from ‘Big Top’ nectarine and the ‘Rich’ yellow
peach series, both from Zaiger breeding program),
non melting and stony hard. The traditional melting
types are no more suited for the present needs of the
fresh market operations, from harvest onward.
Conversely, the ‘slow softening’ melting traits secure a
safer handling of the fruit due to its firmer flesh,
although it could reach, lately, the ‘melting’ stage of a
traditional melting type. The stony hard phenotype is
the only known peach not producing ethylene, that
keeps a ’crunchy’ texture well behind the physiological
ripening (almost three weeks on the tree); some traits
are still to be improved, such as the poor ‘peach’
aroma. Furthermore, peaches with distinctive flavour
could be bred by combining single Mendelian (e.g. the
low acid trait described by Monet) and quantitative
traits (sugars and acids), in order to select fruits featuring
acidic (above 15 meq of total acidity), mild (from
11 to 15 meq) or sweet (below 10 meq) overall
flavour, with tortal sugars ranging from 10 up to more
than 20 °Brix. Other novel fruits could be developed
by combining the ‘non bitter seed’ and the ‘soft stone’
in the very very early ripening cultivars, in order to
breed an ‘all-to-eat’ fruit. Fruit brown rot from Monilinia
spp. and Sharka from PPV are the major disease so
far in Italy. Whyle interesting sources of resistance for
brown rot were already found (e.g. ‘Contender’ yellow
peach) and introgressed in the breeding stocks with
very promising results, no source of resistance for
PPV is known in peach. Selections from hybridization
between peach and almond or P. davidiana (bringing
quantitative resistance to PPV) are now employed as
donor parents in a recent project funded by the Italian
Ministry of Agriculture. Some results are expected in
the near future, although previous work from INRA (France) with P. davidiana showed the resistance is
strongly lowered by the back-cross generations
required to re-gain commercial quality. Resistance to
powdery mildew, altough not a major disease, is
sought by employing well known sources of resistance,
i.e. ‘Bolinha’ and ‘Oro A’ non melting peaches
Primo premio Concorso Internazionale per le Architetture di Servizio per EXPO 2015
No full textPrimo premio al Concorso Internazionale per le Architetture di Servizio di Expo 2015.
Il progetto riguarda 43 edifici diversi per una superficie di 60.000 mq. di funzioni caratterizzanti gli spazi pubblici del sito Expo 2015, includendo ristorazione, commercio, servizi pubblici
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