196,703 research outputs found
Flexible gabion structures in river and stream training works: Section one Weirs for river training and water supply
No full textThe object of this brochure is to suggest methods and outline simple criteria for the design and construction of weirs in gabions and Reno Mattress. Principally it deals with smaII and medium size weirs of up to twenty metres high founded on soils whose main characteristics are limited bearing and shear strengths. On such soils the flexible gabion weirs work weIl compared to rigid structures which are Iikely to fracture if settIement takes place. It is not our intention to put forward new and original design theories, but to assist consultants and contractors who have chosen gabions in preferenee to ot her materiaIs. For a more detailed study of the subject the reader should refer to the technical publications listed in the bibliography. Officine Maccaferri S.p.A. will always be at the disposal of engineers who are interested in the use of gabions and Reno Mattress and who require assistance in the solution of particular problems.KWP-colloquiu
On the preparatory processes of the M6.6 earthquake of June 17th, 2000, in Iceland
No full textA model is proposed to explain the spatial distribution of foreshocks of the June 17th 2000, Ms 6.6 earthquake in the South Iceland Seismic Zone (SISZ) and the high stress drop of the mainshock. Fluids of magmatic origin, ascending at near-lithostatic pressure through a low permeability layer perturb the regional stress field, inhibiting fluid flow laterally, where a high strength asperity is left. The asperity is modeled as elastic, embedded within a medium with low effective rigidity. Regional stresses due to tectonic motions are perturbed by the presence of the asperity, enhancing the production of hydrofractures and foreshocks in the NW and SE quadrants and increasing considerably the shear stress within the asperity, leading to the NS striking mainshock.
Citation: Bonafede, M., C. Ferrari, F. Maccaferri, and R. Stefansson (2007), On the preparatory processes of the M6.6 earthquake of June 17th, 2000, in Iceland, Geophys. Res. Lett., 34, LXXXXX, doi:10.1029/2007GL031391
NOVEL SNP MARKERS FOR FINE MAPPING OF QSBM.UBO-2BS FOR RESISTANCE TO SOIL-BORNE CEREAL MOSAIC VIRUS (SBCMV)
No full textGenetic analysis of Soil-Borne Cereal Mosaic Virus (SBCMV) resistance in durum wheat was
carried out on two recombinant inbred line (RIL) mapping populations obtained from Meridiano
(resistant) x Claudio (susceptible) and Simeto (susceptible) x Levante (resistant) Italian elite
cultivars. The RILs were characterized for SBCMV response under severe infection conditions over
three consecutive years (2007-2009), as reported in Maccaferri et al. (2008 and 2011). Heritability
of the disease response was high, with h2 values always above 80%. Joined quantitative trait locus
(QTL) analysis pointed out the presence of a major quantitative trait locus (QSbm.ubo-2BS) in the
distal chromosome 2BS accounting for 60–90% of the phenotypic variation for symptom severity,
40–70% for virus concentration and 30-60% for grain yield. By means of meta-QTL analysis
QSbm.ubo-2BS was mapped as a unique QTL within a 2 cM-wide interval (LOD-2) close to the
DArT marker wPt-2106 and tagged by wmc661-gwm210-barc35. The addition of the Illumina 90K
SNPs array to the durum linkage maps allowed to map 36 gene-associated SNP markers flanking 1
cM on both sides the Mendelized QTL. The sequence of the wPt-2106 DArT clone was used to
obtain a diagnostic PCR-based assay based on both high resolution melting (HRM) analysis and
simple agarose gel electrophoresis (assay based on a 4 bp-indel) while the SNPs are being
transformed into fluorescent Kasp® marker assays. Up to now, seven functional Kasp® markers
have been obtained and re-mapped on the initial mapping populations. The distribution and
frequency of the resistant haplotype is being investigated in panels of elite durum wheat (Triticum
turgidum ssp. durum), cultivated emmer (Triticum dicoccum) and wild emmer wheat (Triticum
dicoccoides). Collectively, these results provide the basis for efficient marker-assisted selection of
resistance to SBCMV as well as the positional cloning of QSbm.ubo-2BS
Corrigendum: Comparative aerial and ground based high throughput phenotyping for the genetic dissection of NDVI as a proxy for drought adaptive traits in durum wheat (Front. Plant Sci. 9, 893, 10.3389/fpls.2018.00893)
No full textA Corrigendum on Comparative Aerial and Ground Based High Throughput Phenotyping for the Genetic Dissection of NDVI as a Proxy for Drought Adaptive Traits in Durum Wheat by Condorelli, G. E., Maccaferri, M., Newcomb, M., Andrade-Sanchez, P., White, J. W., French, A. N., et al. (2018). Front. Plant Sci. 9:893. doi: 10.3389/fpls.2018.00893 In the original article, we neglected to include the acknowledgment of the TERRA REF project, funded by the Advanced Research Projects Agency-Energy (ARPA-E), U.S. Department of Energy, under award number DE-AR0000594. The authors apologize for this error and state that this does not change the scientific conclusions of the article in any way. The original article has been updated
Chi ha il dito sul telecomando? Il dibattito sulla TV in Gran Bretagna: la politica del controllo culturale (o scelta di Stato) e della libera scelta (o controllo a distanza)
No full textFINE-MAPPING OF QSBM.UBO-2BS=SBM2, A MAJOR QTL FOR RESISTANCE TO SOIL-BORNE CEREAL MOSAIC VIRUS (SBCMV)
No full textQSbm.ubo
-
2BS=Sbm2,
a
major QTL
controlling the response to Soil
-
Borne Cereal Mosaic
Virus
(SB
CMV) in
durum wheat, was c
haracterized in two recombinant inbred line populations,
namely
Meridiano (resistant, R) x Claudio (moderately susceptible, MS) and Simeto (susceptible,
S) x Levante (R). B
y means of meta
-
QTL analysis
QSbm.ubo
-
2BS
was mapped as a
unique QTL
within a 2 cM
-
wide interval (LOD
-
2) in the
distal region of chromosome arm 2BS (Maccaferri et
al., 2012)
.
The addition of the Illumina 90K SNPs array to the durum linkage maps allowed to
identify 36 transcripts
-
associated SNPs tightly associated
with the Mendelized QTL
(Maccaferri et
al., 2014)
. Nine
SNPs from the Illumina 90K wheat array were converted to
KASP markers, which
provided
fluorescent high
-
throughput assays spanning the QTL region.
Marker
-
assisted
selection
(MAS) was performed on
∼
2,000
RILs from the Svevo (R) x Ciccio (S) population
(Gadaleta et al.,
2009)
with two KAS
P markers flanking the QTL interval
, KUBO 9
and
KUBO 13.
MAS identified
291 lines recombinant between the two markers. These lines were characterized for SBCMV
response in the 2016 field nursery under severe and uniform SBCMV infection. The lines were
scor
ed for symptom severity (SS) on a 0 to 4 scale
, where 0 = very res
istant and 4 = very
susceptible (Vallega and Rubies Autonell, 1985). They were also genotyped with seven KASP
markers distributed along the QTL interval (
KUBO 1
,
KUBO 3
,
KUBO 27
,
KUBO 29
,
KU
BO 38,
KUBO 40
and
KUBO 41
) and with the DArT marker
wPt
-
2106
, the marker most associated with the
phenotype in the Meridiano x Claudio RIL population (Maccaferri et al., 2012). The bimodal
distribution of SS reflects the segregation of the resistance trai
t in the QTL interval: frequency
peaks were observed around values of 1.7 and 3.8. The fine
-
mapping allowed to
narrow
the most
probable support interval to 0,2 cM between
KUBO 27
and
KUBO 1
based on the Svevo x Ciccio
RILs population.
Work is in progress to analyze other - 1,000 RILs of the same population in order
to confirm the results obtained with the first part of the study and to improve the ongoing fine - mapping of the gene responsible for the resistance
The Re-Emergence of Territorial Cleavage in West European Politics: Regionalism in Historical Perspective (1960s–1990s)
No full textThe English Way to Italian Socialism: The PCI, ‘Red Bologna’ and Italian Communist Culture as Seen through the English Prism
No full textThis contribution analyses the British perception of Red Bologna during the seventies and eighties, when politicians in the UK thought of Bolognese Social-Democrats as an example of good government. Maccaferri investigates the way in which the British political debate and the intellectual public discourse (as seen in journals, pamphlets and books) ‘imported’, deconstructed, adapted and appropriated the Italian communist model. The aim is to cast light on an ‘Italy Made in Britain’ that was constructed in the prevalently left-wing British political debate between the mid-nineteen seventies and the late nineteen-eighties, namely until Italian Communism started to search for a new name and a new identity, and, indeed, it liquidated the model itself. This article considers the debate expressed in the pamphlet Red Bologna (eds Max Jäggi, Roger Müller, Sil Schmid, 1977), journals such as Power and Politics and The New Left review, and newspapers such as The Guardian and The Observer. Furthermore, it focusses on the resurgence of leftist intellectuals. It deals primarily with Marxism Today’s Italian discourse. By focusing on such a view, Maccaferri reconstructs the way in which, whilst engaging with the Thatcherite period, the English political debate and intellectual discourse perceived and constructed a very different kind of Italy that was simultaneously revolutionary and communist in its ideology and ‘moderate’ and socialist – if not liberal – in its policies
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