86,525 research outputs found
Capre domestiche e migrazioni dell’uomo : i marcatori AFLP raccontano
No full textNell’ambito del progetto di ricerca europeo “Econogene” (www.econogene.eu), che aveva come
oggetto lo studio della diversità biologica di capre e pecore a livello transnazionale e paneuropeo,
sono state studiate 55 popolazioni (razze) di capre domestiche, allevate con metodi tradizionali in
18 nazioni dall’Iran al Portogallo, e una popolazione di egagri proveniente dai monti dell’Iran.
I 1682 esemplari sono stati genotipizzati mediante 3 combinazioni di primer altamente
polimorfiche, producendo 102 marcatori nucleari AFLP. Le relazioni genetiche tra le diverse
popolazioni sono state evidenziate attraverso l’Analisi Fattoriale delle Corrispondenze (AFC). Per
definizione, i componenti dell’AFC sono tra loro indipendenti, e quindi lungo i diversi assi sono
rappresentati gli effetti di eventi indipendenti che hanno plasmato il genoma delle capre
domestiche.
Sono stati presi in considerazione i primi 3 assi, che spiegano rispettivamente il 16,2%, il 7,1% e il
6,3% dell’inerzia complessiva. Ciò che si evince dall’analisi è:
i) le razze domestiche allevate in Iran e nel Vicino Oriente (Turchia, Cipro, Giordania e Arabia
Saudita) sono geneticamente più simili agli egagri che alle razze europee;
ii) le popolazioni europee si ripartiscono in un gruppo alpino-centro-europeo e in un gruppo
mediterraneo, comprendente le popolazioni allevate nelle regioni che si affacciano sul Mar
Mediterraneo;
iii) le razze alpine (con poche eccezioni), le capre sarde e l’antica popolazione inselvatichita di
Montecristo fanno cluster con le popolazioni allevate in Iran.
La suddivisione delle 56 popolazioni in tre grandi gruppi geografici - Nord Europa, Mediterraneo,
Vicino e Medio Oriente - è confermata anche dall’analisi bayesiana condotta con il software
Structure.
Tali evidenze sperimentali sono state discusse sulla base di dati geologici e archeologici,
concentrando l’attenzione sulla Mezzaluna Fertile e sulle aree montuose iraniane (ove le capre
selvatiche vennero addomesticate), e sul periodo neolitico allorquando si innescò la colonizzazione
del continente europeo da parte degli agricoltori e dei pastori.
Nel genoma delle razze ircine, dopo più di 11.000 anni dagli eventi di domesticazione, permangono
evidenti i segni delle due vie lungo le quali si compì la colonizzazione dell’Europa: via mare, con
rotte di piccolo cabotaggio a sud; via terra a nord, forse passando nelle pianure a oriente del Mar
Nero.
Segreteria organizzativa [email protected]
Segreteria tecnico-scientifica [email protected]
Sito web: www.biod.irealp.it
Più debole, ma ancora rilevabile, il legame che accomuna le razze locali alpine e le popolazioni
insulari sarde e di Montecristo alle capre dell’Iran: gli antichi segnali genetici di una provenienza
comune sono rimasti confinati solo nelle zone più marginali dell’areale europeo, in enclavi
geografiche ben definite, al riparo da incroci e meticciamenti.
Dunque la storia dell’uomo e delle sue migrazioni può essere ricostruita studiando il genoma dei
suoi “compagni di viaggio”: un ulteriore, valido motivo per conservare la diversità biologica degli
animali domestici
Alpine and Northern European arctic charr (Salvelinus alpinus) populations analyzed by means of mitochondrial control region sequences and nuclear AFLP markers.
No full textVariations on the Author
No full text“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
Single Nucleotide Polymorphisms in collagen genes and association with skin quality trait
No full text[Newspaper Clipping: Author Claims Evidence of Second JFK Assassin #1]
No full textNewspaper article titled "Author Claims Evidence of Second JFK Assassin." The article states that author Richard J. Whalen concluded "that there is circumstantial evidence to support the theory of a second assassin in the shooting of President John F. Kennedy.
Post-glacial history of Arctic charr (Salvelinus alpinus) populations inferred by AFLP neutral markers and mtDNA analysis
No full textA QTL for protein percentage on Italian Friesian BTA 28 : microsatellites confirm AFLP data
No full textExperimental data of feed consumption and composition, recorded over 5 consecutive short periods of growth from 30 crossbred male pigs divided 2 two groups and fed two restricted feeding regimes from 25 to 160 kg LW, were used to run a model in which a set of theoretical values, to describe the potential chemical growth of the pig, was preliminarily assumed. Simulated values of average daily gain (ADG) and feed conversion ratio (FCR) were the outputs. Estimates of protein mass at maturity (Pm, kg) and relative growth rate (B, d-1) for each feeding regimes where successively obtained through an optimization procedure which has minimized the coefficients of variation of the differences between the estimates and the measurements of ADG and FCR. The very similar values of Pm (33.7 and 33.2 kg), and B (0.0104 and 0.0105 d-1), obtained for the two feed treatments suggested that these values can be used as operational data to describe the growth parameters of the experimental pigs used
Also By The Same Author: AKTiveAuthor, a Citation Graph Approach to Name Disambiguation
No full textThe desire for definitive data and the semantic web drive for inference over heterogeneous data sources requires co-reference resolution to be performed on those data. In particular, name disambiguation is required to allow accurate publication lists, citation counts and impact measures to be determined. This paper describes a graph-based approach to author disambiguation on large-scale citation networks. Using self-citation, co-authorship and document source analyses, AKTiveAuthor clusters papers, achieving precision of 0.997 and recall of 0.818 over a test group of eight surname clusters
John F. Kennedy telegram to Roosevelt
No full textJersey Homesteads (later the Borough of Roosevelt) was established in the 1930s as an agro-industrial cooperative community. It was established specifically for urban Jewish garment workers, many of whom had emigrated from Europe. President John F. Kennedy sent a telegram to the citizens of Roosevelt, New Jersey, apologizing for not being able to attend the memorial dedication in honor of former President Franklin Delano Roosevelt. (Jersey Homesteads became Roosevelt in 1945 in honor of the president.) President Kennedy expressed his gratitude to the people of Roosevelt for constructing the memorial, and commented that it will serve as a constant reminder of Roosevelt's good works
Molecular characterization of Alpine and northern european populations of Arctic charr Salvelinus alpinus (Linnaeus, 1758) by means of nuclear and mitochondrial markers
No full text- …
