La sélection génomique, qui a révolutionné la sélection génétique des bovins laitiers notamment, est désormais envisagée dans d’autres espèces comme l’espèce caprine. La clé du succès de la sélection génomique réside dans la précision des évaluations génomiques. Chez les caprins laitiers français, le gain de précision attendu avec la sélection génomique était un des questionnements de la filière en raison de la petite taille de la population de référence disponible (825 mâles et 1945 femelles génotypés sur une puce SNP 50K). Le but de cette étude est d’évaluer comment augmenter la précision des évaluations génomiques dans l’espèce caprine. Une étude de la structure génétique de la population de référence caprine constituée d’animaux de races Saanen et Alpine, a permis de montrer que la population de référence choisie est représentative de la population élevée sur le territoire français. En revanche, les faibles niveaux de déséquilibre de liaison (0,17 entre deux SNP consécutifs) de consanguinité et de parenté au sein de la population, similaires à ceux trouvés en ovins Lacaune, ne sont pas idéaux pour obtenir une bonne précision des évaluations génomiques. De plus, malgré l’origine commune des races Alpine et Saanen, leurs structures génétiques suggèrent qu’elles se distinguent clairement d’un point de vue génétique. Les méthodes génomiques (GBLUP ou Bayésiennes) « two-step », basées sur des performances pré-corrigées (DYD, EBV dérégressées) n’ont pas permis une amélioration significative des précisions des évaluations génomiques pour les caractères évalués en routine (caractères de production, de morphologie et de comptages de cellules somatiques) chez les caprins laitiers. La prise en compte des phénotypes des mâles non génotypés permet d’augmenter les précisions des évaluations de 3 à 47% selon le caractère. L’ajout des génotypes de femelles issues d’un dispositif de détection de QTL améliore également les précisions (de 2 à 14%) que ce soit pour les évaluations two steps ou les évaluations basées sur les performances propres des femelles (single step). Les précisions sont augmentées de 10 à 74% avec les évaluations single step comparées aux évaluations two steps, ce qui permet d’atteindre des précisions supérieures à celles obtenues sur ascendance. Les précisions obtenues avec les évaluations génomiques multiraciales, bicaractères et uniraciales sont similaires même si la précision des valeurs génomiques estimées des candidats à la sélection est plus élevée avec les évaluations multiraciales. La sélection génomique est donc envisageable chez les caprins laitiers français à l’aide d’un modèle génomique multiracial single step. Les précisions peuvent être légèrement augmentées par l’inclusion de gènes majeurs tels que celui de la caséine αs1 notamment à l’aide d’un modèle « gene content » pour prédire le génotype des animaux non génotypés. / Genomic selection which is revolutionizing genetic selection in dairy cattle has been tested in several species like dairy goat. Key point in genomic selection is accuracy of genomic evaluation. In French dairy goats, gain in accuracy using genomic selection was questioning due to the small size of the reference population (825 males and 1 945 females genotyped). The aim of this study was to investigate how to reach adequate genomic evaluation accuracy in French dairy goat population. The study of reference population structure (Alpine and Saanen breeds) showed that reference population is similar to the whole population of French dairy goats. But the weak level of linkage disequilibrium (0.17 between two consecutive SNP), inbreeding and relationship between reference and candidate population were not ideal to maximize genomic evaluation accuracy. Despite their common origin, genetic structure of Alpine and Saanen breeds suggested that they were genetically distant. Two steps genomic evaluation (GBLUP, Bayesian) based on performances corrected for fixed effect (DYD, deregressed EBV) did not improve genetic evaluation accuracy compared to classical evaluations for milk production traits, udder type traits and somatic cells score classically selected in French dairy goat. Taking into account phenotypes of ungenotyped sires increased genomic evaluation from 3 to 47% depending on the trait considered. Adding female genotypes also improved genomic evaluation accuracies from 2 to 4% depending on the method (two steps or single step) and on the trait. When using gemomic evaluation directly based on female performances (single step), accuracy of genomic evaluation reach the level obtained from ascendance in classic evaluation which was not the case using two steps evaluations. Genomic evaluation accuracies were similar when using multiple-trait model, multi-breed or single breed evaluation. But accuracies derived from prediction error variances were better when using multi-breed genomic evaluations. Genomic selection is feasible in French dairy goats using single step multi-breed genomic evaluations. Accuracies could be slightly improved integrating major gene as αs1 casein especially when using « gene content » approach to predict genotypes of ungenotyped animals.

Biracial individuals undergo a developmental process that is different than monoracial individuals. Not only do they have to develop a strong and cohesive self-esteem, but also develop a strong and cohesive racial identity to have a healthy self-concept. The media is a social structure that has infiltrated into many aspects of American lives, including their racial identity. The media perpetuates current beliefs concerning race and racial identity. This research investigates how biracial identity has been portrayed in the media. Historically, biracial individuals have been portrayed as the tragic "mulatto" because of their confused racial background. In addition, mulatto women have been stereotyped as exotic and sexual objects. A content analysis was used to investigate how the media presents biracial identity. Only movies with black/white biracial individuals were watched. The categories under study included perceived race, character's race, skin color, likeability, sex appeal, ability to contribute, ability to be violent, mental health, overall positive portrayal social, and negative portrayal score. This study may suggest that the media is making attempts to rectify old stereotypes. Overall, this study does demonstrate that the media portrays biracial and black characters differently in film. One overarching theme from these results implies that the perception of race is more salient than one's actual race.

The study offers a practical theological examination of three congregational youth ministries located in three different multi-racial and multi-cultural contexts in the Northeastern region of the United States. In the first move of this study, I present findings from ethnographic research in the three congregational youth ministries and argue that each congregation displays a disconnect between their practices of evangelism and discipleship and young people’s questions about and experiences with race, racism, and racial identity. In the second move of this study, I argue that this disconnect is due to the pervasiveness of post-racialism in the church and society, understood as a collection of social practices that promote colorblindness as a virtue and perpetuate systemic racism as a habitus by fostering an aesthetic of forgetfulness regarding racial violence and oppression. In light of this, I suggest that a way forward in congregational youth ministries in multiracial and multicultural contexts requires a disruption of and resistance to post-racial aesthetics for the sake of meeting students’ needs. In the third move, I turn attention to Martin Luther King, Jr. to forge a way forward, as King is often taken to be a normative source for interracial congregations. However, while such interracial congregations tend to rely on a limited view of King that interprets him as an inspiration for embracing post-racialism, I argue that King’s theological praxis can be a critical resource for discerning how to resist post-racialism. In concluding the dissertation, I offer suggestions for how current practitioners can begin taking steps toward resisting post-racialism in their work with youth and young adults. / 2025-01-31T00:00:00Z

Thesis (M.A. (Media Studies)) -- University of Limpopo, 2021 / The emergence of democracy in South Africa brought a fallacious rainbow nation to permit all citizens to benefit from equal opportunities regardless of colour. The national broadcaster, SABC as a tool of transformation to promote multiracialism was meant to depict balanced representations of all races through its programmes such as soap operas. This study’s aim was to examine the depiction of racial characterisation in Skeem Saam which is broadcast by the SABC. The study employed a qualitative approach which allowed the use of descriptive analysis. Purposive sampling was used to determine the soap opera as the most appropriate to examine racial characterisation. The data was collected through qualitative content analysis which enabled the researcher to peruse Skeem Saam’s episodes which address the study’s objectives. Thematic content analysis was used to analyse the data which enabled the analysis of ten characters and the contexts these characters are portrayed in. The study found that there are negative racial misconceptions and stereotypes attached to Black character roles through occupational roles, personality traits, social and economic status as compared to White character roles. Therefore, that there is misrepresentation of Blacks through roles played by Black characters. The study recommends a need for transformative policy amendments which will bind soap opera producers to include realistic and balanced representations of race and gender. Narrative formations should also feature realistic developments in society rather fictional storylines that run at the expense of daunting Blacks growth in South Africa.

Until recently, society and science often ignored, erased, and avoided bisexual women and men and individuals with biracial and multiracial identities, and rarely considered these identities simultaneously. Prior research has shown that some lesbians and gay people of color exhibit resilience against sexual minority stress due in part to an inoculating effect of exposure to racism earlier in life. However, little is known about the lived experience of thriving, resilient bisexual multiracial individuals. In the tradition of positive psychology and context of intersectionality theory, this qualitative study explored how multiracial bisexual individuals develop and maintain flourishing well-€being despite sociocultural factors promoting chronic stressors. In-€depth, semistructured interviews were conducted with 6 multiracial bisexual participants. Interpretive phenomenological analysis revealed 6 key themes for developing and maintaining resilience: integration of intersecting social identities, social support, emotional openness, hope and optimism, meaningful life, and life/personal accomplishments. Deeper knowledge about resilience-€building in holders of multiple-€marginal identities may influence informed stakeholders (bisexual, biracial and multiracial individuals and their families, service providers, researchers, public institutions, and decision makers) to advance development of more effective counseling programs and influence more responsive and affirmative social policies. Subsequent social change involves the advance of sexual health, rights, and behaviors of bisexual, biracial and multiracial citizens.

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The purpose of this phenomenological study was to explore how individuals from different multiracial/multiethnic groups experience and process the phenomenon of parental racial ethnic socialization (RES). Critical multiracial race theory, critical race theory, and bioecological systems theory offered a conceptual framework to how RES is often presented and processed. This study was guided by two research questions: (1) What are the experiences of RES among multiracial individuals? and (2) How do multiracial individuals process the parental racial ethnic socialization they were offered? Nine qualitative, one-on-one, semistructured interviews were conducted with individuals from three different multiracial/multiethnic groups. Results revealed that experiences of RES varied along with how participants processed RES. Three subthemes and one theme emerged related to the RES experiences of participants. For some participants lack of conversations were evident in their RES, which meant that conversations surrounding multiraciality and other racialized topics were not present. Other participants disclosed the subtheme of preparedness as part of their RES experience, while others mentioned the importance of environment to their RES experience. Additionally, the theme of changes over time arose, demonstrating how different life events can impact RES experiences. As for how multiracial/multiethnic individuals process RES experiences, the main theme of identity arose with three subthemes. Participants felt that the lack of awareness/knowledge parents had about potential multiracial experiences left them feeling confused about how to navigate their multiple heritages.

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