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- Ahola, Virpi, et al.
(författare)
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The Glanville fritillary genome retains an ancient karyotype and reveals selective chromosomal fusions in Lepidoptera
- 2014
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Ingår i: Nature Communications. - : Springer Science and Business Media LLC. - 2041-1723. ; 5, s. 4737-
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Tidskriftsartikel (refereegranskat)abstract
- Previous studies have reported that chromosome synteny in Lepidoptera has been well conserved, yet the number of haploid chromosomes varies widely from 5 to 223. Here we report the genome (393 Mb) of the Glanville fritillary butterfly (Melitaea cinxia; Nymphalidae), a widely recognized model species in metapopulation biology and eco-evolutionary research, which has the putative ancestral karyotype of n = 31. Using a phylogenetic analyses of Nymphalidae and of other Lepidoptera, combined with orthologue-level comparisons of chromosomes, we conclude that the ancestral lepidopteran karyotype has been n = 31 for at least 140 My. We show that fusion chromosomes have retained the ancestral chromosome segments and very few rearrangements have occurred across the fusion sites. The same, shortest ancestral chromosomes have independently participated in fusion events in species with smaller karyotypes. The short chromosomes have higher rearrangement rate than long ones. These characteristics highlight distinctive features of the evolutionary dynamics of butterflies and moths.
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- Bask, Miia, 1977-, et al.
(författare)
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Pathways to educational attainment in middle adulthood : the role of gender and parental educational expectations in adolescence
- 2014
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Ingår i: Gender differences in aspirations and attainment. - Cambridge : Cambridge University Press. - 9781107645196 - 9781107021723 ; , s. 389-411
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Bokkapitel (refereegranskat)abstract
- In this chapter, we apply the expectancy-value model of motivation, particularly the family socialization aspect of the model (Eccles (Parsons) et al., 1983; Eccles, 1994, 2007; Wigfield & Eccles, 2002) to address a number of key questions regarding gender differences in adult attainment, in particular educational attainment. When some individuals in the work force of today were children, what kinds of expectations did they have for themselves? What expectations did their parents have for them? Did these expectations vary for girls and boys? Were parents' expectations about their children's future education related to the actual education that these adolescents later attained in midlife? How did the child's academic ability and characteristics of the family figure into this picture? We present original empirical findings, drawing on data collected for a Swedish longitudinal study that spans from childhood to middle adulthood. In line with the expectancy-value model of motivation, the family's socioeconomic status (SES) was identified as an important predictor of several outcomes. Consistent with the model, for both genders, the family's SES and parental educational expectations in middle adolescence predicted middle adult educational attainment. The importance of grades differed by gender in that the mathematics grade was a statistically significant predictor of middle adult educational attainment for males, while for females grades in Swedish were a statistically significant predictor of middle adult educational attainment. In this chapter, we situated these study findings in the wider pertinent scholarly literature and discussed the implications of our results as they might relate to efforts to promote equitable and optimal life chances for the current generation of European girls and boys.
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- Daukantaitė, Daiva, 1974-
(författare)
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Subjective Well-Being in Swedish Women
- 2006
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The present thesis concerns middle-aged women’s subjective well-being (SWB). The interest is focused on the importance of childhood factors, social circumstances, and personality for middle-aged women’s general SWB. Data were taken from the longitudinal research program Individual Development and Adaptation (IDA, Magnusson & Bergman, 2000) and concerned a sample of about 300 women. The main analyses were made on data collected at age 43, but data collected at age 13 and age 49 were also used to elucidate the purposes of this thesis. The results can be summarized as follows: 1) In a Swedish sample of middle-aged women, social circumstances had only a moderate effect on general SWB variables. The strongest relationship was found between marital status and global life satisfaction. When personality factors were controlled for, they wiped out nearly all relationships between the social circumstances variables and SWB, except for those between global life satisfaction and marital status or unemployment; 2) The level of general SWB was found to be considerably higher for Swedish employed women as compared to their counterparts in Lithuania and different socio-demographic variables predicted SWB in those two countries. For the Swedish sample, family-oriented variables were the strongest predictors of SWB, while for the Lithuanian sample income and educational level were more important; 3) Results from applying longitudinal structural equation modeling suggested that optimism in adolescence influenced optimism in middle age, which in its turn had both a direct influence on global life satisfaction and an indirect influence via the negative affect dimension. In relation to a number of different adjustment factors measured in adolescence it was found that optimism was the only factor that was constantly related to SWB 30 years later; 4) Typical patterns of general SWB were identified. Cluster analyses at age 43 and age 49 separately resulted in similar well-functioning six cluster solutions at both ages, indicating structural stability across six years. In addition to the typical high/low/average SWB clusters that could be to some degree expected from variable-oriented results, a cluster with intense affect and one with very low GLS emerged. All clusters except the latter one showed individual stability across six years.
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- Ford, Paul R., et al.
(författare)
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The developmental activities of elite soccer players aged under-16 years from Brazil, England, France, Ghana, Mexico, Portugal and Sweden
- 2012
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Ingår i: Journal of Sports Sciences. - : Routledge. - 0264-0414 .- 1466-447X. ; 30:15, s. 1653-1663
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Tidskriftsartikel (refereegranskat)abstract
- The developmental activities of 328 elite soccer players aged under-16 years from Brazil, England, France, Ghana, Mexico, Portugal and Sweden were examined using retrospective recall in a cross-sectional research design. The activities were compared to the early diversification, early specialisation, and early engagement pathways. Players started their involvement in soccer at approximately 5 years of age. During childhood, they engaged in soccer practice for a mean value of 185.7, s ¼ 124.0 h _ year71, in soccer play for 186.0, s ¼ 125.3 h _ year71, and in soccer competition for 37.1, s ¼ 28.9 h _ year71. A mean value of 2.3, s ¼ 1.6 sports additional to soccer were engaged in by 229 players during childhood. Players started their participation in an elite training academy at 11 to 12 years of age. During adolescence, they engaged in soccer practice for a mean value of 411.9, s ¼ 184.3 h _ year71, in soccer play for 159.7, s ¼ 195.0 h _ year71, and in soccer competition for 66.9, s ¼ 48.8 h _ year71. A mean value of 2.5, s ¼ 1.8 sports other than soccer were engaged in by 132 players during this period. There were some relatively minor differences between countries, but generally the developmental activities of the players followed a mixture of the early engagement and specialisation pathways, rather than early diversification.
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- Kiuru, Noona, et al.
(författare)
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Best friends in adolescence show similar educational careers in early adulthood
- 2012
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Ingår i: Journal of applied developmental psychology. - : Elsevier BV. - 0193-3973 .- 1873-7900. ; 33:2, s. 102-111
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Tidskriftsartikel (refereegranskat)abstract
- The present study investigated the role of best friends in educational career development from adolescence to adulthood. Participants' (N = 476) reciprocal best friendships were identified at age 15, while their educational attainment was investigated in early adulthood (age 26), their intelligence (IQ) at age 13, and parental education, educational expectations and academic achievement at age 16. The results revealed that adolescent best friends ended up pursuing similar educational careers in adulthood. Furthermore, three kinds of partner-effects were found when adolescents' prior career behaviors were controlled for: (1) best friends' intelligence predicted adolescents' later academic performance; (2) best friends' parental education predicted adolescents' educational expectations; and (3) best friends' educational expectations predicted adolescents' educational attainment in early adulthood.
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