Divergence with gene flow across a speciation continuum of Heliconius butterflies

BACKGROUND: A key to understanding the origins of species is determining the evolutionary processes that drive the patterns of genomic divergence during speciation. New genomic technologies enable the study of high-resolution genomic patterns of divergence across natural speciation continua, where taxa pairs with different levels of reproductive isolation can be used as proxies for different stages of speciation. Empirical studies of these speciation continua can provide valuable insights into how genomes diverge during speciation. METHODS: We examine variation across a handful of genomic regions in parapatric and allopatric populations of Heliconius butterflies with varying levels of reproductive isolation. Genome sequences were mapped to 2.2-Mb of the H. erato genome, including 1-Mb across the red color pattern locus and multiple regions unlinked to color pattern variation. RESULTS: Phylogenetic analyses reveal a speciation continuum of pairs of hybridizing races and incipient species in the Heliconius erato clade. Comparisons of hybridizing pairs of divergently colored races and incipient species reveal that genomic divergence increases with ecological and reproductive isolation, not only across the locus responsible for adaptive variation in red wing coloration, but also at genomic regions unlinked to color pattern. DISCUSSION: We observe high levels of divergence between the incipient species H. erato and H. himera, suggesting that divergence may accumulate early in the speciation process. Comparisons of genomic divergence between the incipient species and allopatric races suggest that limited gene flow cannot account for the observed high levels of divergence between the incipient species. CONCLUSIONS: Our results provide a reconstruction of the speciation continuum across the H. erato clade and provide insights into the processes that drive genomic divergence during speciation, establishing the H. erato clade as a powerful framework for the study of speciation.This work was funded by the following awards: Hanne and Torkel Weis-Fogh Fund (sample collection, awarded to Nicola Nadeau and Richard Merrill); CNRS Nouraugues (BAC); NSF DEB-1257839 (BAC), DEB-1257689 (WOM), DEB- 1027019 (WOM); and the Smithsonian Institution

Gendered academic adjustment among Asian American adolescents in an emerging immigrant community

Abstract: Research on the academic adjustment of immigrant adolescents has been predominately conducted in large cities among established migration areas. To broaden the field's restricted focus, data from 172 (58% female) Asian American adolescents who reside within a nontraditional or emerging immigrant community in the Southeastern US were used to examine gender differences in academic adjustment as well as school, family, and cultural variables as potential mediators of gender differences found. Results suggest that girls report significantly higher educational goals, intrinsic academic motivation, and utility value of school compared to boys. These gender differences are statistically mediated by ethnic exploration and family processes, most prominently, family respect. School connectedness and perceived discrimination are also associated with academic adjustment at the bivariate level, suggesting that academic success may be best promoted if multiple domains of influence can be targeted. gender | academic adjustment | Asian adolescents | immigrants | immigran

Mexican-Origin Couples in the Early Years of Parenthood: Marital Well-Being in Ecological Context

In this article, we draw from Huston's (2000) 3-level model of marriage to provide an informed and integrative template for organizing current knowledge and guiding future inquiry into the study of marital well-being among a rapidly growing segment of the United States' population: low-income, Mexican-origin couples in the early years of parenthood. More specifically, we advocate for a dyadic approach that attends to elements of the macroenvironment, such as cultural background, and how those elements interact directly and indirectly with spouses' individual characteristics and marital behavior. In so doing, we demonstrate the value of an ecological approach for understanding current research and for informing future work studying marriage among new parents of Mexican origin

Parenting During Childhood Predicts Relationship Satisfaction in Young Adulthood: A Prospective Longitudinal Perspective

Using three waves of data drawn from the National Survey of Families and Households (n = 438 young adult children) we examined the process by which parental warmth and harsh parenting during childhood influences children's romantic relationship satisfaction in young adulthood. Harsh parenting was directly associated with children's relationship satisfaction, independently and in conjunction with parental warmth, whereas parental warmth was indirectly associated with relationship satisfaction through family cohesion during adolescence. Results were consistent across male and female young adults involved in married, dating, and cohabiting relationships. Findings from this prospective, longitudinal study coincide with previous research using adult children's retrospective reports of parenting behavior and highlight the importance of family of origin influences on romantic relationships in young adulthood

Ethnic Differences in Women's Emotional Reactions to Parental Nonsupportive Emotion Socialization

Recent evidence suggests that the association between parents’ use of nonsupportive emotion socialization practices and their children's subsequent negative emotional outcomes varies based on ethnicity. The goal of this study is to test the proposition that African American women interpret parental nonsupportive emotion socialization practices less negatively than European American women. In this study, 251 European and African American women completed a measure on recalled feelings when their parents engaged in nonsupportive emotion socialization practices during childhood. Results indicated that African American women reported feeling more loved and less hurt and ashamed than European American women when their parents enacted nonsupportive emotion socialization practices such as ignoring, punishing, minimizing, and teasing them when distressed. Possible mechanisms for this difference and the need for additional research exploring ethnic differences in emotion socialization and its effects on adjustment are discussed

Mexican immigrant wives’ acculturative stress and spouses’ marital quality: The role of wives’ marriage work with husbands and close friends

With a sample of 120 Mexican-origin couples, we examined the extent to which wives’ marriage work (i.e., discussions about marital concerns) with husband and marriage work with friend moderated associations between wives’ acculturative stress and spouses’ marital satisfaction and marital negativity. Results from a series of multiple regression analyses showed that wives’ marriage work with husbands (a) served to protect husbands’ marital quality from wives’ acculturative stress and (b) was linked with greater marital satisfaction for wives. These findings represent an important first step in understanding the sociocultural factors that compromise and protect marital quality for couples of Mexican origin as they navigate the challenges of adapting to life in the United States

Economic Pressure, Cultural Adaptation Stress, and Marital Quality Among Mexican-Origin Couples

Based on data from a sample of 120 first-generation Mexican immigrant couples collected at the start of the Great Recession in the United States, this study tested an actor–partner interdependence mediation model (APIMeM) in which spouses’ perceptions of stress related to economic pressure and cultural adaptation were linked to their own and their partners’ reports of marital satisfaction through spouses’ depressive symptoms and marital negativity. As hypothesized, results supported indirect links between economic and cultural adaptation stressors and spouses’ marital negativity and satisfaction: (1) contextual stress was associated with depressive symptoms, (2) depressive symptoms were positively associated with marital negativity for both husbands and wives and negatively associated with marital satisfaction for wives only, and (3) marital negativity was inversely associated with marital satisfaction for both spouses. Two partner effects emerged: (a) husbands’ depressive symptoms were positively associated with wives’ reports of marital negativity and (b) husbands’ marital negativity was inversely related to wives’ marital satisfaction. From these findings, we can infer that the psychological distress that arises for Mexican-origin spouses as they respond to the challenges of making ends meet during difficult economic times while they simultaneously navigate adapting to life in a new country is evidenced in their marital quality. Specifically, this study found that contextual stress external to the marital relationship was transmitted via spouses’ psychological distress and negative marital exchanges to spouses’ marital satisfaction. Wives’ marital satisfaction was shown to be uniquely vulnerable to their own and their husbands’ depressive symptoms and marital negativity

Links Between Remembered Childhood Emotion Socialization and Adult Adjustment Similarities and Differences Between European American and African American Women

The purpose of this article was to examine whether recollections of mothers’ emotion socialization practices during childhood are linked to adult emotional well-being as indexed by depression, trait anger, and cardiac vagal tone, and whether these effects vary for African American and European American women. Participants included 251 women (128 European American, 123 African American) who ranged in age from 18 to 44 years (M = 25 years). Multigroup confirmatory factor analyses indicated strong measurement and factor invariance across African American and European American participants. Remembered nonsupportive emotion socialization was linked with elevated depressive symptoms for European American women but not African American women and with elevated trait anger for both groups. Remembered supportive emotion socialization was linked with higher resting vagal tone for both groups. The results provide some support for the view that nonsupportive emotion socialization may be more detrimental for European Americans than African Americans

Gender-typed attributes and marital satisfaction among Mexican immigrant couples: A latent profile approach

Informed by socioecological and dyadic approaches to understanding marriage, the current study examined the patterning of gender-typed attributes among 120 Mexican immigrant opposite sex couples and the subsequent links with spouses’ reports of marital satisfaction. Latent profile analysis (LPA) was used to identify typologies of couples based on spouses’ self-reported masculine and feminine attributes. Three couple profiles were identified: (a) Androgynous Couples, (b) Undifferentiated Couples, and (c) Mismatched Couples. Results from a mixed model ANCOVA showed profile differences in couples’ marital satisfaction based on profile membership, suggesting that spouses in the Undifferentiated Profile were the least satisfied. Findings illustrate a lack of gender-typing at the individual and couple levels that challenge stereotypical and patriarchal depictions of Latino marital relationships and propose a more complex understanding of Mexican-origin spouses’ gender-typed attributes than has yet been portrayed in the literature. The finding that couples with 1 androgynous partner (i.e., wives in the Mismatched Profile) reported similar levels of marital satisfaction to couples in the Androgynous Profile offers additional insights regarding how these qualities operate under the unique socioecological niches that Mexican immigrant couples inhabit—contexts that may place demands on spouses that challenge gendered and culturally bound depictions of marriage