Search results for " Distance"
showing 10 items of 696 documents
An assessment of genetic relationships within the genus Digitalis based on PCR-generated RAPD markers
2000
RAPD markers were used to study inter-specific variation among six species of the genus Digitalis: D. obscura, D. lanata, D. grandiflora, D. purpurea, D. thapsi and D. dubia, and the hybrid D. excelsior (D. purpurea×D. grandiflora). A total of 91 highly reproducible bands amplified with four arbitrarily chosen decamer primers were obtained. Homology of the co-emigrating RAPD markers was tested by blot hybridisation and sequencing of selected bands. The application of a range of statistical approaches for RAPD data analysis, including distance and parsimony methods, family clustering and the analysis of molecular variance (AMOVA), indicated that these molecular markers were taxonomically inf…
A hierarchical analysis of genetic structure and variability in patchily distributed coexisting Chiastocheta species (Diptera:Anthomyiidae)
1996
The pattern of genetic variation in four coexisting fly species of the genus Chiastocheta was studied by allozyme electrophoresis. The fly species are confined to patches of one plant, Trollius europaeus, and thus experience very similar habitat fluctuations. Collection sites were chosen in a hierarchical fashion and F-statistics were estimated at three levels: intraregion, inter-region and total population. Population characteristic genetic parameters were compared within and among species and were related to the hierarchical level. The species were used as replicate experiments for inference of habitat history, and the hierarchical levels were used as inference for specific gene flow patt…
The Role of Ancestral Duplicated Genes in Adaptation to Growth on Lactate, a Non-Fermentable Carbon Source for the Yeast Saccharomyces cerevisiae
2021
This article belongs to the Section Molecular Informatics.
Iris bismarckiana in Israel and Jordan—New findings and taxonomic remarks
2001
Iris bismarckiana (Iris section Oncocyclus) was found for the first time in the west Gilead in Jordan. This discovery was utilized to shed some light on the taxonomic relationships among the light-colored irises in the Levant. Morphometric quantitative analysis of the Jordanian population compared to I. bismarckiana allies in Israel (I. bismarckiana in the Galilee and I. hermona in the Golan) suggests that the Jordanian population is I. bismarckiana, despite the large distance from the main distribution area. Cluster analysis, based on the morphology, revealed that some of the populations of I. bismarckiana have closer affinities to I. hermona than to each other. Populations of I. hermona a…
Evaluation of morphological and genetic diversity of loquat accessions grown in sicily
2015
In this study 20 accessions of loquat (Eriobotrya japonica Lindl.) that originated from Sicily and other countries were characterized phenotypically and genotyped using seven microsatellite markers. The microsatellites clearly distinguished 14 accessions; three pairs of local accessions were not differentiated, and three accessions from abroad can be considered bud sport mutations of the main Spanish cultivar âAlgerieâ. The mean alleles per locus was four, ranging from two with the marker EJ075 and five with EJ012 and EJ271; the mean Polymorphic Information Content was 0.53; the average expected and observed heterozygosities resulted 0.62 and 0.59, respectively. These values revealed a …
Genetic variation of an Italian long shelf-life tomato (Solanum lycopersicon L.) collection by using SSR and morphological fruit traits
2014
The recovery of ancient germplasm in tomato (Solanum lycopersicon L.) has become necessary to limit the wide genetic erosion caused by the employment of modern cultivars. Among germplasm collections, long shelf-life landraces could represent an important source of biodiversity. The present study provides a first set of molecular and phenotypic data on long shelf-life (so called "da serbo" in southern Italy) tomato collection, mainly originated from Sicily together with some landraces from Campania and Apulia. The analysis of fruit traits showed a low intra-varietal variation, while exhibiting a quite higher inter-varietal variability. Overall, the cultivars have been classified in six fruit…
Digital or In-Person: The Relationship Between Mode of Interpersonal Communication During the COVID-19 Pandemic and Mental Health in Older Adults Fro…
2021
Social distancing has limited the spread of the coronavirus (COVID-19), but also changed communication patterns. However, studies of how mental health in older adults relates to the usage of different modes of interpersonal communication are sparse. The aim of this study was to analyze how COVID-19-related changes in the frequencies of using different modes of communication (digital or in-person) have influenced mental health in older adults from 27 countries. Our study was based on part of Wave 8 of the SHARE data set, which focused on the living situation of older adults during the pandemic. Findings suggest that in-person communication benefited mental health in people aged ≥60 years mo…
Resilience in Informal Caregivers of People Living with Dementia in the Face of COVID-19 Pandemic-Related Changes to Daily Life
2022
Abstract. Informal caregivers of people living with dementia (PwD) are at increased risk for the development of stress-related physical and mental illness. Nevertheless, because of differing resilience, they show interindividual differences in their ability to cope. Particularly during the COVID-19 pandemic, with the associated pandemic control measures and pandemic-related changes to daily life, resilience might be further challenged, and stress might consequently increase. Therefore, we review the evidence on informal caregivers’ experience during the COVID-19 pandemic regarding effects of the pandemic control measures on (a) the caregiver’s health, (b) the care recipient’s health, (c) th…
Life-Space Mobility and Active Aging as Factors Underlying Quality of Life Among Older People Before and During COVID-19 Lockdown in Finland—A Longit…
2020
Abstract Background Social distancing, that is, avoiding places with other people and staying at home, was recommended to prevent viral transmission during the COVID-19 pandemic. Potentially, reduced out-of-home mobility and lower activity levels among older people may lower their quality of life (QOL). We studied cross-sectional and longitudinal associations of and changes in life-space mobility, active aging, and QOL during COVID-19 social distancing compared to 2 years before. Methods Altogether 809 community-living participants initially aged 75, 80, or 85 years of our active aging study (AGNES) conducted in 2017–2018 took part in the current AGNES-COVID-19 survey in May and June 2020. …
Maintenance of high quality of life as an indicator of resilience during COVID-19 social distancing among community-dwelling older adults in Finland
2021
Abstract Purpose Social distancing during the COVID-19 pandemic reduced possibilities for activities of choice potentially threatening quality of life (QoL). We defined QoL resilience as maintaining high quality of life and studied whether walking speed, absence of loneliness, living arrangement, and stress-coping ability predict QoL resilience among older people. Methods Community-dwelling 75-, 80-, and 85-year-old persons (n = 685) were interviewed and examined in 2017–2018 and were followed up during COVID-19 social distancing in 2020. We assessed QoL using the OPQOL-brief scale and set a cut-off for ‘constant high’ based on staying in the highest baseline quartile over the follow-up and…