Search results for "CA [SR]"

Morphological and genetic diversity within Pilosella hoppeana aggr. (Asteraceae) in Italy and taxonomic implications

2013

Morphological variation, ploidy level and genetic diversity have been studied on 10 populations of the Pilosella hoppeana aggr. from the Alps, Abruzzo, Calabria and Sicily.Chromosome counts showed that the plants from Abruzzo and those from Sicily are tetraploid (2n = 36); they are assigned to P. hoppeana subsp. macrantha. The plants from the Alps (P. hoppeana subsp. hoppeana) and those from Calabria are diploid. The Calabrian populations, previously included in P. hoppeana subsp. macrantha, are shown to belong to a separate species, P. leucopsilon. The principal component analysis, based on 25 morphological characters, allowed distinguishing clearly four groups. An allozymes study using 10…

Environmental effects on molecular and phenotypic variation in populations of Eruca sativa across a steep climatic gradient

2013

Abstract In Israel Eruca sativa has a geographically narrow distribution across a steep climatic gradient that ranges from mesic Mediterranean to hot desert environments. These conditions offer an opportunity to study the influence of the environment on intraspecific genetic variation. For this, we combined an analysis of neutral genetic markers with a phenotypic evaluation in common-garden experiments, and environmental characterization of populations that included climatic and edaphic parameters, as well as geographic distribution. A Bayesian clustering of individuals from nine representative populations based on amplified fragment length polymorphism (AFLP) divided the populations into a…

Genetic variations in the endangered Sicilian endemic Brassica rupestris: proposals for a conservation strategy

2012

Brassica rupestris Raf. is a chasmophyte species that includes two subspecies, both endemic to Central-Western Sicily (Italy). Inter-Simple Sequence Repeat (ISSR) markers were used to detect genetic diversity within and among eight populations representative of the species' distribution range. High levels of genetic diversity were revealed both at the population (PPB = 53.88%, HS = 0.212, Sh = 0.309) and at the species level (PPB = 96.55%, HT = 0.307, Sh = 0.464). The correlation between genetic and geographical distances was negative (Mantel test, r = -0.06, P < 0.95). The two subspecies of B. rupestris, subsp. rupestris and subsp. hispida, showed remarkable genetic similarity and molec…

Isolation and biodiversity inCytisus villosusPourret (Fabaceae, Genisteae): enzyme polymorphism in disjunct populations

1997

ABSTRACT The genetic diversity of isolated populations of Cytisus villosus has been studied by means of enzyme polymorphism analysis. Two types of isolated populations were studied: “terrestrial islands” in Sicily, and “true islands” in the Aeolian archipelago. In the populations of “true islands” the number of alleles and the heterozygosity are lower than in “terrestrial islands”. Isolation amongst Sicilian populations seems to be more recent than isolation of the Aeolian populations, and may be attributed to climatic changes which occurred during the Holocene and/or to human activities. The disjunction of the Aeolian populations seems much more recent than the origin of the isles themselv…

The Girgentana Goat Breed: A Zootechnical Overview on Genetics, Nutrition and Dairy Production Aspects

2017

In recent years, there has been a great interest in recovering and preserving local livestock breeds. An interesting situation is represented by the Girgentana goat, an ancient local breed reared in Sicily. Over recent years, this breed has become almost extinct, in part as a consequence of the marked decrease in fresh goat milk consumption. On the basis of these considerations, several studies on its genetic structure and management aspects have been conducted in order to protect the Girgentana goat from the risk of extinction and recover its genetic and economic value. In this context, information on genetics, nutrition and dairy production aspects may have a crucial role in the improveme…

Genetic analysis of Citrus aurantium L. (Rutaceae) cultivars by ISSR molecular markers

2011

Eight cultivars of Citrus aurantium L., showing peculiar morphological traits of the fruits and leaves, were analyzed genetically. Inter simple sequence repeat (ISSR) was chosen as molecular markers because they represent a highly efficient system for investigating variability at intraspecific level. The particular morphological traits were discussed, the genetic identity and distance matrix based on Nei index was calculated, and the unweighted pair group method with arithmetic mean (UPGMA) dendrogram was generated. A total of 53 clearly distinguished DNA bands were considered for the ISSR analysis of which 24 were polymorphic. A basic C. aurantium fingerprinting pattern was obtained. The I…

SOLUZIONI OPERATIVE ED ASPETTI QUALITATIVI PER LA GEOCODIFICA DI POPOLAZIONI IN AMBITO SANITARIO.

2015

IntroduzioneL'utilizzo dei Geographic Information Systems (GIS) in ambito sanitario, continua a ricevere grande attenzione. La disponibilità di informazioni sulla localizzazione degli individui, consente di effettuare associazioni territoriali sulle cause delle patologie, nonché di indagare aspetti legati alla distribuzione dei servizi sanitari ed all'equità di accesso alle cure. ObiettiviAnalizzare le principali problematiche e le soluzioni operative per la geocodifica di popolazioni e proporre un indice di qualità della geocodifica di cui poter tenere conto in sede di analisi. MetodiCome caso studio vengono illustrate le fasi che hanno portato alla georeferenziazione di indirizzi residenz…

Cosmographia Petri Apiani / per Gemman Frisium... ; iam demum ab omnibus vindicata mendis, ac nonnullis quoque locis aucta ; Additis eiusdem argument…

1564

Caplletres

Libro de la Cosmographia de Pedro Apiano : el qual trata la descripcion del Mundo y sus partes ...

Grav. en port. - Caplletres

Reformulación y necesidad de una nueva geografía regional flexible

2001

Joaquin.Farinos@uv.es FARINÓS DASÍ, Joaquin. La recuperación del territorio en el seno de las ciencias sociales ha provocado la reemergencia de la Geografía Regional. Si inicialmente su orientación fue primordialmente económica hoy es política, tanto desde el punto de vista de las policies como de la polity, aglutinadas hoy en torno a la planificación del desarrollo territorial. Ésta representa una oportunidad estratégica para la revalorización social de la Geografía y para el desarrollo de nuevas metodologías. Retrieval of territory by social sciences has promoted reemergence of Regional Geography. Even though initially his course was basically economic now is political, both from policy a…