نتایج جستجو برای: ratios of genetic variation and environmental variation
تعداد نتایج: 24110272 فیلتر نتایج به سال:
background: cutaneous and visceral leishmaniases are present in fars province in the south of iran. the current study aimed to evaluate the inter- and intragenic diversities of leishmania species isolated from patients with leishmaniasis in fars province, using pcr-based analyses and dna sequencing of the n-acetylglucosamine-1-phosphate transferase ( nagt ) gene. methods: clinical samples were...
background: based on genotyping study of human isolates of giardia lamblia ; humans are mainly infected by two assemblages a and b. the present study was carried out to determine the sub-assemblages of g. lamblia isolated from food handlers referred to kashan health centers, central iran, 2015. methods: in this cross-sectional study, 3653 stool samples collected from food-handlers that annually...
mitochondria1 dna (mtdna) control region sequences were analyzed to evaluate the population genetic structure of persian sturgeon (acipenser persicus) in caspian sea. a total of 45 specimens were collected from the different locations of the caspian sea. mtdna control region was amplified using pcr. direct sequencing was performed according standard method. the results showed that 12 haplotypes...
Background: Both genetic and environmental factors are known to affect body mass index (BMI), but detailed understanding of how their effects differ during childhood and adolescence is lacking. Objectives: We analyzed the genetic and environmental contributions to BMI variation from infancy to early adulthood and the ways they differ by sex and geographic regions representing high (North Americ...
There has been a large focus on the genetics of traits involved in adaptation, but knowledge of the environmental variables leading to adaptive changes is surprisingly poor. Combined use of environmental data with morphological and genomic data should allow us to understand the extent to which patterns of phenotypic and genetic diversity within a species can be explained by the structure of the...
Genetic and environmental influence on asthma: a population-based study of 11,688 Danish twin pairs.
The aim of this study was to estimate the relative influence of genetic and environmental factors on the aetiology of asthma. The classic twin study design was used to analyse data on self-reported asthma obtained by a questionnaire mailed to 34,076 individuals, aged 12-41 yrs and originating from the Danish Twin Register. The cumulative incidence of asthma was 6.2% in the pooled sample. The da...
Protected areas buffer species from anthropogenic threats and provide places for the processes that generate and maintain biodiversity to continue. However, genetic variation, the raw material for evolution, is difficult to capture in conservation planning, not least because genetic data require considerable resources to obtain and analyze. Here we show that freely available environmental and g...
the objective of this study was to estimate genetic parameters and to investigate the type of gene action in controlling androgenesis in wheat. two wheat cultivars of grebe and houtman were reciprocally crossed with two synthetic genotypes of do1 and pol and then a complete set of the parents, f1, reciprocal f1 (rf1), f2 and back-cross generations (bc1 and bc2) of each cross were used for anthe...
maryam sadat salamati1, hossein zeinali2 ,ehdi yousefi3 1- ardestan branch, islamic azad university, ardestan, iran 2- esfahan agricultural and natural research center, isfahan, iran 3- assist. prof, payam noor university, isfahan, iran received: 10 february 2011 accepted: 26 may 2011 * corresponding author: e-mail: [email protected] abstract in order to...
background : migrant studies offer a unique opportunity to analyze variation in disease occurrence due to background factors. the role of environmental and lifestyle exposures are of particular interest in cancer research, and migrant studies can be considered as natural experiments in epidemiological research. large numbers of immigrants from different regions of the world and the availability...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید