Identification of the Yellow Skin Gene Reveals a Hybrid Origin of the Domestic Chicken

Eriksson, Jonas; Larson, Greger; Gunnarsson, Ulrika; Bed’Hom, Bertrand; Tixier‐Boichard, Michèle; Strömstedt, Lina; Wright, Dominic; Jungerius, Annemieke P; Vereijken, Addie; Randi, Ettore; Jensen, Per; Andersson, Leif

doi:10.1371/journal.pgen.1000010

Cited by 401 publications

(272 citation statements)

References 33 publications

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“…The scale of human selection on tropical forest species can be seen in the number of them that are central to global cuisine today, including sweet potato, manioc, chilli, black pepper, mango, yams, pineapple and banana 64 (Figure 3). While domesticated tropical forest fauna are fewer in number, the now globally-distributed domestic chicken also most likely had a tropical forest origin in the form of the jungle fowl 65 . Despite new crops, however, increasingly settled tropical forest communities also continued to practice the same agro-forestry systems developed by their forebearers, focused on the management of various tree species.…”

Section: Farming In the Forestmentioning

confidence: 99%

The deep human prehistory of global tropical forests and its relevance for modern conservation

et al. 2017

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Abstract/first paragraphSignificant human impacts on tropical forests have been considered the preserve of recent societies, linked to large-scale deforestation, extensive and intensive agriculture, resource mining, livestock grazing, and urban settlement. Cumulative archaeological evidence now demonstrates, however, that Homo sapiens has actively manipulated tropical forest ecologies for at least 45,000 years. It is clear that these millennia of impacts need to be taken into account when studying and conserving tropical forest ecosystems today. Nevertheless, archaeology has so far provided only limited practical insight into contemporary human-tropical forest interactions. Here, we review significant archaeological evidence for the impacts of past hunter-gatherers, agriculturalists, and urban settlements on global tropical forests. We compare the challenges faced, as well as the solutions adopted, by these groups with those confronting present-day societies, which also rely on tropical forests for a variety of ecosystem services. We emphasise archaeology's importance not only in promoting natural and cultural heritage in tropical forests, but also in taking an active role to inform modern conservation and policy-making.

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Section: Farming In the Forestmentioning

confidence: 99%

The deep human prehistory of global tropical forests and its relevance for modern conservation

et al. 2017

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“…The yellow skin colour is the result of the expression of carotenoid pigments in the skins of birds (Smyth, 1990). According to Eriksson et al (2007), it is generally considered to be associated with the individual's adaptive fitness that reflects its nutritional status or health that is indicative of its foraging efficiency and immune status.…”

Section: Morphological Variationsmentioning

confidence: 99%

“…Similarly, the presence or absence of the carotenoid pigments, primarily xanthophylls, in the feed is responsible for the diversity in skin colour of chickens. The genetic basis of this variation was described by Eriksson et al (2007).…”

Section: Introductionmentioning

confidence: 99%

Morphological features of indigenous chicken populations of Ethiopia

Dana

Dessie²,

Waaij

et al. 2010

Anim. Genet. Resour.

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SummaryThis study describes the variations in the physical features and the useful attributes of different populations of indigenous chickens. Five populations of chickens in different regions of Ethiopia were studied based on 13 qualitative traits recorded for a total of 1 125 chickens. Additional measurements on quantitative traits (shank length and body weight) were also included. Descriptive statistics (nonparametric and F tests) were used to analyze the data. Each of the study populations possessed multiple variants of plumage colours and other physical features. However, white body plumage is one of the prominent features of Farta chickens and red is predominant in the other populations. Pea comb is the dominant comb type in all regions. Most of the chickens in the high altitude regions have yellow skin. The geographic distribution and frequency of naked neck chickens are generally small, and the available small proportion is found mainly in the low altitude regions. Males in all populations are heavier and taller than the females. Body weights range from 1 411 g (Konso) to 1 700 g (Horro) in adult males and from 1 011 g (Konso) to 1 517 g (Sheka) in females. Most of the morphological traits that were studied showed a very low level of associations with each other. Keywords: indigenous chickens, morphological charactersRésumé Cette étude décrit les variations des caractéristiques physiques et les attributs utiles des différentes populations de poules indigènes. On a étudié cinq populations de poules dans des régions différentes de l'Ethiopie sur la base de 13 caractères qualitatifs enregistrés sur un total de 1125 poules. D'autres mensurations sur les caractères quantitatifs, sur la hauteur du jarret et sur le poids corporel ont été également incluses. Les statistiques descriptives, les tests non paramétriques et du rapport des variances (test F) ont été utilisés pour analyser les données. Chaque population étudiée avait des variants multiples de couleurs du plumage et d'autres caractéristiques physiques. Cependant, le plumage blanc du corps est une des caractéristiques proéminentes des poules Farta tandis que le rouge est prédominant dans les autres populations. La crête en pois est la crête dominante dans toutes les régions. La plupart des poules des régions à haute altitude ont la peau jaune. La distribution géographique et la fréquence des poules Naked Neck sont généralement faibles et la petite proportion disponible se trouve principalement dans les régions des plaines. Les mâles de toutes les populations sont plus lourds et plus grands que les femelles. Les poids corporels variaient entre 1411 (Konso) et 1700 grammes par oiseau (Horro) pour les mâles adultes et entre 1011 (Konso) et 1517 grammes par oiseau (Sheka) pour les femelles. La plupart des caractères morphologiques étudiés indiquaient un niveau très faible d'association des uns avec les autres. Mots-clés: poules indigènes, caractères morphologiquesResumen Este estudio describe las variaciones en relación a características físicas y atributos ...

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“…Red Junglefowl still commonly exist in their native habitats (Brickle et al., 2008; Brisbin, 1995) and are clearly distinguishable from domestic chickens (Johnsgard, 1999). Although genetic contributions from multiple Junglefowl species may have played a role in the domestication process (Eriksson et al., 2008; Nishibori, Shimogiri, Hayashi, & Yasue, 2005), archeological and genetic evidence (Fumihito et al., 1994, 1996; Gongora et al., 2008; Storey et al., 2012; Thomson et al., 2014) indicate that Red Junglefowl from Southeast Asia was the primary progenitor of all domestic breeds of modern chickens. In a previous study, we identified substantial haplotype variation in the major histocompatibility complex (MHC) B‐locus of wild Red Junglefowl (Fulton et al., 2016; Nguyen‐Phuc, Fulton, & Berres, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Most, if not all, recent genetic studies involving junglefowl, however, sample birds from captive colonies (e.g., Berthouly et al., 2009; Eriksson et al., 2008; Fumihito et al., 1994; Gering, Johnsson, Willis, Getty, & Wright, 2015; Mekchay et al., 2014; Moiseyeva, Romanov, Nikiforov, Sevastyanova, & Semyenova, 2003; Romanov & Weigend, 2001; Rubin et al., 2010; Tadano et al., 2008; Worley et al., 2010) or from vaguely described geographic localities (e.g., Akaboot, Duangjinda, Phasuk, Kaenchan, & Chinchiyanond, 2012; Granevitze et al., 2007; Liu et al., 2006; Miao et al., 2013; Nishibori et al., 2005; Okumura et al., 2006; Ulfah et al., 2016). Even the female Red Junglefowl individual used for the Gallus gallus reference sequence (International Chicken Genome Sequencing Consortium, 2004) is traceable to the San Diego Zoo, itself believed to be introgressed with White Leghorn alleles (M. E. Delany, University of California, Davis, CA, personal communication).…”

Section: Introductionmentioning

confidence: 99%

Genetic structure in Red Junglefowl (Gallus gallus) populations: Strong spatial patterns in the wild ancestors of domestic chickens in a core distribution range

Nguyen-Phuc

Berres

2018

Ecology and Evolution

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Red Junglefowl (Gallus gallus) are among the few remaining ancestors of an extant domesticated livestock species, the domestic chicken, that still occur in the wild. Little is known about genetic diversity, population structure, and demography of wild Red Junglefowl in their natural habitats. Extinction threats from habitat loss or genetic alteration from domestic introgression exacerbate further the conservation status of this progenitor species. In a previous study, we reported extraordinary adaptive genetic variation in the MHC B‐locus in wild Red Junglefowl and no evidence of allelic introgression between wild and domestic chickens was observed. In this study, we characterized spatial genetic variation and population structure in naturally occurring populations of Red Junglefowl in their core distribution range in South Central Vietnam. A sample of 212 Red Junglefowl was obtained from geographically and ecologically diverse habitats across an area of 250 × 350 km. We used amplified fragment‐length polymorphism markers obtained from 431 loci to determine whether genetic diversity and population structure varies. We found that Red Junglefowl are widely distributed but form small and isolated populations. Strong spatial genetic patterns occur at both local and regional scales. At local scale, population stratification can be identified to approximately 5 km. At regional scale, we identified distinct populations of Red Junglefowl in the southern lowlands, northern highlands, and eastern coastal portions of the study area. Both local and long‐distance genetic patterns observed in wild Red Junglefowl may reflect the species’ ground‐dwelling and territorial characteristics, including dispersal barriers imposed by the Annamite Mountain Range. Spatially explicit analyses with neutral genetic markers can be highly informative and here elevates the conservation profile of the wild ancestors of domesticated chickens.

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Identification of the Yellow Skin Gene Reveals a Hybrid Origin of the Domestic Chicken

Cited by 401 publications

References 33 publications

The deep human prehistory of global tropical forests and its relevance for modern conservation

The deep human prehistory of global tropical forests and its relevance for modern conservation

Morphological features of indigenous chicken populations of Ethiopia

Genetic structure in Red Junglefowl (Gallus gallus) populations: Strong spatial patterns in the wild ancestors of domestic chickens in a core distribution range

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