Search results for "LOCUS"

PGal4 excision reveals the pleiotropic effects of Voila, a Drosophila locus that affects development and courtship behaviour

2001

0016-6723 (Print) Journal Article Research Support, Non-U.S. Gov't; In Drosophila melanogaster, the PGal4 transposon inserted at the chromosomal site 86E1-2 is associated with the Voila1 allele that causes multiple phenotypes. Homozygous Voila1/1 flies rarely reach adulthood and heterozygous Voila1/+ adult males display strong homosexual courtship behaviour. Both normal behavioural and developmental phenotypes were rescued by remobilizing the PGal4 element. Yet, the rescue of heterosexual courtship and of adult viability did not occur in the same strains, indicating that these defects have different genetic origins. Furthermore, many strains showed a partial rescue of both characters. Molec…

Drosophila melanogaster histone H2B retropseudogene is inserted into a region rich in transposable elements.

1998

We have isolated and characterized the genomic sequence of a Drosophila melanogaster histone H2B pseudogene that is localized outside of the cluster of the replication-dependent histone genes and has all the properties of a retropseudogene. It is highly homologous to the transcribed region of the D. melanogaster histone H2B gene, but not to its flanking regions, and is surrounded by short direct repeats. The pseudogene contains several point mutations that preclude its translation. The sequence of the 3' region of this pseudogene is compatible with the hypothesis that the 3' terminal stem-loop structure of the histone H2B mRNA has served as a primer for the reverse transcription event from …

Expression of phase-specific haemolymph polypeptides in a laboratory strain and field catches of Schistocerca gregaria.

2003

Uvarov's theory of locust phase polymorphism implies a differential phase-specific gene expression. It was the goal of the present investigation to provide data on the molecular level for this concept. We used the technique of 2D gel electrophoresis to generate haemolymph polypeptide maps from mature locust males. Under the given conditions we identified 238 polypeptide spots by their molecular weight and isoelectrical point. Isolated and crowded males from the Mainz strain, all originating from crowded ancesters, differed in 20 spots: three were solitary-specific and 17 crowded-specific. Field catches of solitary and gregarious S. gregaria in Mauritania revealed that those males showed the…

Apuntes sobre la lucha contra la plaga de langosta en los escritos de los siglos modernos

2008

La inquietud suscitada por los efectos de las plagas de langosta, más allá del ámbito estrictamente campesino, históricamente ha transcendido a reyes, legistas, médicos o historiadores, que dejaron constancia de ella en sus obras o en la legislación. El presente estudio recopila información sobre el impacto que estas plagas causaron sobre todos los estamentos de la sociedad durante los siglos modernos. The concern about the effects of locust plagues, beyond the rural sphere, has historically transcended to kings, lawyers, doctors and historians, who have left evidence thereof in their works and legislation. The present study compiles together information on the impact of these pests in all …

PSMA6 (rs2277460, rs1048990), PSMC6 (rs2295826, rs2295827) and PSMA3 (rs2348071) genetic diversity in Latvians, Lithuanians and Taiwanese

2014

PSMA6 (rs2277460, rs1048990), PSMC6 (rs2295826, rs2295827) and PSMA3 (rs2348071) genetic diversity was investigated in 1438 unrelated subjects from Latvia, Lithuania and Taiwan. In general, polymorphism of each individual locus showed tendencies similar to determined previously in HapMap populations. Main differences concern Taiwanese and include presence of rs2277460 rare allele A not found before in Asians and absence of rs2295827 rare alleles homozygotes TT observed in all other human populations. Observed patterns of SNPs and haplotype diversity were compatible with expectation of neutral model of evolution. Linkage disequilibrium between the rs2295826 and rs2295827 was detected to be c…

Isolation and characterization of twenty microsatellite loci for the ballan wrasse, Labrus bergylta

2014

Published version of an article in the journal: Conservation Genetics Resources. Also available from the publisher at: http://dx.doi.org/10.1007/s12686-013-0114-3 Open Access We developed 20 nuclear microsatellite DNA markers from tri- and tetra-nucleotide enriched libraries in the ballan wrasse. In our dataset (N = 241), the detected number of alleles per locus ranged from 2 to 12, and the observed and expected heterozygosity varied from 0.251 to 0.778 and from 0.286 to 0.804, respectively. Cross amplification with the goldsinny wrasse resulted in two usable loci whereas the corkwing wrasse amplified in one locus. The ballan wrasse is an important resource for aquaculture as it delouses fa…

Economic and Psychological Factors in Entrepreneurial Tendency

2011

In the actual context of global economical crisis, the research question we raised was: Which of the personality traits, formerly associated with entrepreneurship, remain sufficiently stable/strong to overcome the negative economic conditions? That was the starting point to propose experimental evaluation of the possible effect of certain factors such as the economical crisis context/information regarding the economy status and the personal perception regarding the money source/value as regards to the tendency of investing in a small business of the youngsters with a high Internal Locus of Control level.

Studio Longitudinale sulle strtegie di adattamento in pazienti sottoposti a dialisi: confronto comparativo tra pazienti in dialisi peritoneale ed emo…

2010

Genetic polymorphism at the CSN1S1 gene in Girgentana dairy goat breed

2013

The aim of this work was to evaluate the variability of the αs1-casein locus in the endangered Girgentana dairy goat breed in order to define genetic improvement and a conservation program for this breed. The study was performed on 200 dairy goats by means of different PCR protocols. The most frequent alleles were A (0.590) and F (0.290) followed by B (0.065) and N (0.047). CSN1S1 E allele was identified with a very low frequency (0.008). The most common genotype was AF (0.365) followed by AA (0.340). The high frequency of the strong genotypes is associated with the production of milk with high fat and protein content and with optimal technological properties. In Girgentana goat breed, the …

Campylobacter spp. contamination of chicken carcasses during processing in relation to flock colonisation.

2005

The presence and numbers of campylobacters on chicken carcasses from 26 slaughter groups, originating from 22 single-house flocks and processed in four UK plants, were studied in relation to the level of flock colonisation determined by examining the caecal contents of at least ten birds per group. The prevalence of campylobacters on carcasses from five campylobacter-negative flocks processed just after other negative flocks was low (/=30%). Campylobacters were isolated from 90 to 100% of carcasses from three flocks which were partly colonised, with 5, 5 and 30% of caecal contents positive, and which were processed after fully colonised flocks. All carcasses from the remaining fully colonis…