67 research outputs found

    Системний підхід у соціальній адаптації студентів-іноземців

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    SUMMARY: High-throughput genotyping and sequencing technologies facilitate studies of complex genetic traits and provide new research opportunities. The increasing popularity of genome-wide association studies (GWAS) leads to the discovery of new associated loci and a better understanding of the genetic architecture underlying not only diseases, but also other monogenic and complex phenotypes. Several softwares are available for performing GWAS analyses, R environment being one of them. RESULTS: We present cgmisc, an R package that enables enhanced data analysis and visualisation of results from GWAS. The package contains several utilities and modules that complement and enhance the functionality of the existing software. It also provides several tools for advanced visualisation of genomic data and utilises the power of the R language to aid in preparation of publication-quality figures. Some of the package functions are specific for the domestic dog (Canis familiaris) data. AVAILABILITY: The package is operating system-independent and is available from: https://github.com/cgmisc-team/cgmisc CONTACT: [email protected]

    Replication and Explorations of High-Order Epistasis Using a Large Advanced Intercross Line Pedigree

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    Dissection of the genetic architecture of complex traits persists as a major challenge in biology; despite considerable efforts, much remains unclear including the role and importance of genetic interactions. This study provides empirical evidence for a strong and persistent contribution of both second- and third-order epistatic interactions to long-term selection response for body weight in two divergently selected chicken lines. We earlier reported a network of interacting loci with large effects on body weight in an F2 intercross between these high– and low–body weight lines. Here, most pair-wise interactions in the network are replicated in an independent eight-generation advanced intercross line (AIL). The original report showed an important contribution of capacitating epistasis to growth, meaning that the genotype at a hub in the network releases the effects of one or several peripheral loci. After fine-mapping of the loci in the AIL, we show that these interactions were persistent over time. The replication of five of six originally reported epistatic loci, as well as the capacitating epistasis, provides strong empirical evidence that the originally observed epistasis is of biological importance and is a contributor in the genetic architecture of this population. The stability of genetic interaction mechanisms over time indicates a non-transient role of epistasis on phenotypic change. Third-order epistasis was for the first time examined in this study and was shown to make an important contribution to growth, which suggests that the genetic architecture of growth is more complex than can be explained by two-locus interactions only. Our results illustrate the importance of designing studies that facilitate exploration of epistasis in populations for obtaining a comprehensive understanding of the genetics underlying a complex trait

    Genome-Wide Effects of Long-Term Divergent Selection

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    To understand the genetic mechanisms leading to phenotypic differentiation, it is important to identify genomic regions under selection. We scanned the genome of two chicken lines from a single trait selection experiment, where 50 generations of selection have resulted in a 9-fold difference in body weight. Analyses of nearly 60,000 SNP markers showed that the effects of selection on the genome are dramatic. The lines were fixed for alternative alleles in more than 50 regions as a result of selection. Another 10 regions displayed strong evidence for ongoing differentiation during the last 10 generations. Many more regions across the genome showed large differences in allele frequency between the lines, indicating that the phenotypic evolution in the lines in 50 generations is the result of an exploitation of standing genetic variation at 100s of loci across the genome

    Population Changes in Rural Areas in Northern Sweden 1985-1995

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    During the 1990s most municipalities and rural areas in northern Sweden have experienced renewed depopulation. At the same time, many regional centres (mainly university towns), but also some rural areas, have shown significant population growth. This paper focuses on the latter rural areas and describes their geographical location and the socio-demographic characteristics of their populations. Three types of rural areas with population growth have been identified. Firstly, there are the rural areas within daily communing distance from a few regional centres. Secondly, there is a group of rural areas that has benefited from the tourist industry. Most of these tourist resorts are mountain villages close to the border with Norway. Finally, there are also a few rural areas characterised by attractive residential environments and leisure housing.This working paper by Örjan Pettersson is based on a paper presented at the PIMA98 conference in Aberdeen, Scotland (26-29 June 1998). The participation at the conference was supported by a grant from The Gösta Skoglund International Foundation. The paper has been published in proceedings from the conference (Gourlay, D. ed., 1999, Marginal Rural Areas in the New Millenium). An earlier version in Swedish, “Glesbygd i regionala kraftfält”, has been published in Westlund, H. ed., 1998, Regional utveckling i lokala och globala kraftfält.SIR-rapport 106

    Contemporary population changes in north Swedish rural areas

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    During the 1990s most municipalities and rural areas in northern Sweden have experienced renewed depopulation. At the same time, many regional centres (mainly university cities), but also some rural areas, have shown significant population growth. This article focuses on the latter rural areas and describes their geographical location and the socio-demographic characteristics of their populations. Three types of rural areas with population growth have been identified. Firstly, there are the rural areas within daily commuting distance from regional centres. Secondly, there is a group of rural areas that has benefited from the tourist industry. Most of these tourist resorts are mountain villages close to the border with Norway. Finally, there are also a few rural areas characterised by attractive residential environments and leisure housing

    Skrivregler för Trafikverket : Språk och litteratur

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    Att skriva texter som någon annan ska ha nytta av tillhör vardagen för många av oss på Trafikverket. Gemensamt för oss alla är att vi jobbar på en myndighet, och då finns det förväntningar på hur vi använder språket. Våra skrivregler är ett urval ur Myndigheternas skrivregler, baserat på erfarenheter av vad som är mest nödvändigt. Ersätter publikation 2011:14

    Ingen ko på isen! : En analys av mejerinäringen i Västerbottens län

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    Nya modeller för regional mobilisering - jämförelser och lärande i Kvarkenregione

    Socio-economic dynamics in sparse regional structures

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    The aim of the thesis is to describe and analyse socio-economic changes in northern Sweden. Focus is on the period 1985-2000. Population development, restructuring of economic activities, political and cultural changes are related to a theoretical discussion on the transformation of sparsely populated areas as an outcome of multi-dimensional and interrelated processes. Besides an introductory and concluding section, the thesis contains four papers. The first paper deals with forestry's changed role in the local economy of four municipalities located in the inland areas of upper Norrland. The changes within forestry have been driven by adaptation to global competition and rapid technical development. Even though timber production has increased in some of the municipalities, job losses have greatly reduced the importance of forestry in the local economies. Many employees have left forestry for work in other branches, unemployment or retirement However, relatively few have moved from the area. A multiplier model was employed in order to analyse the impact on the local economy. The second paper deals with population changes in the six northernmost counties. During the 1990s, most municipalities and rural areas in northern Sweden have experienced renewed depopulation. At the same time, some rural areas have shown significant population growth. Three types of rural areas with population growth have been identified. Firstly, there are rural areas within daily commuting distance from regional centres. Secondly, there is a group of rural areas, mainly a number of mountain villages close to the border with Norway, which has benefited from the tourist industry. Finally, there are a few rural areas characterised by attractive residential environments and leisure housing. The third paper is based on a classification of 500 residential areas and villages in the county of Västerbotten into seven types of housing environments. In this way, the county is broken down into a mosaic of housing environments characterised by very different prerequisites for consumption and economic development A complex and dispersed pattern of disadvantaged residential areas all over the county indicates the difficulty in treating counties and municipalities as homogeneous regions. In the fourth paper, focus is on young peoples' attitudes towards staying in or moving to small communities within a local labour market region in northern Sweden. The study is based on telephone interviews with 400 young men and women in the Umeå region. Half the interviewees lived in the university city of Umeå while the others were residents in five rural municipalities surrounding Umeå. In general, the males and females aged 19-25 had a much more positive attitude towards living in rural communities than did those aged 15-18. Nevertheless, only half of the young people already living in the rural municipalities wanted to stay there. Among the young people living in the city, slightly less than 50% showed an interest in moving to the surrounding rural areas, mainly the countryside within commuting distance from the city. The connection between higher education and out-migration of young people from rural areas is also highlighted.Diss. (sammanfattning) Umeå : Univ., 2002digitalisering@um

    Skrivregler för Trafikverket : Språk och litteratur

    No full text
    Att skriva texter som någon annan ska ha nytta av tillhör vardagen för många av oss på Trafikverket. Gemensamt för oss alla är att vi jobbar på en myndighet, och då finns det förväntningar på hur vi använder språket. Våra skrivregler är ett urval ur Myndigheternas skrivregler, baserat på erfarenheter av vad som är mest nödvändigt. Ersätter publikation 2011:14
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