Genetic Characterization of the “Chusca Lojana”, a Creole Goat Reared in Ecuador, and Its Relationship with Other Goat Breeds
Lenin Aguirre-Riofrio, Teddy Maza-Tandazo, Manuel Quezada-Padilla, Oscar Albito-Balcazar, Alex Flores-Gonzalez, Osvaldo Camacho-Enriquez, Amparo Martinez-Martinez, BioGoat Consortium, and Juan Vicente Delgado-Bermejo
An individual from a population presents a series of characteristics that differ from the rest and that increase as the kinship relationships are lower; this leads to the fact that two populations that stop exchanging genetic material through mating eventually come to present characters common to all members of each, but different between the two. This was what happened with the animal populations brought to America more than 500 years ago from the Iberian Peninsula in the colonization period, resulting in Creole populations that inhabit the harshest environments of our immense geography. The Creole goat “Chusca Lojana” has adapted to live in the dry forest region of Southern Ecuador, where environmental conditions are warm-dry, with sparse vegetation and a rather irregular topography. In the present study, the intra-breed genetic diversity of this goat is analyzed as well as its genetic relationships with other breeds. Significant FIS and intra-breed structure show that there is some heterogeneity and structure within the breed. However, inter-breed structure results underline that this breed is differentiated from other Creole breeds, because crossbreeding with other breeds was not detected; therefore, we must take advantage of this valuable genetic resource, and ensure its conservation and selection.
The largest population of goats (62%) in Ecuador is in the dry forest region in the south of the country. A Creole goat, named “Chusca Lojana”, has adapted to the dry forest region where environmental conditions are warm-dry, with sparse vegetation. Knowledge of the genetic information of the Creole goat is important to determine intra-racial diversity, the degree of genetic distance among other breeds of goats, and the possible substructure of the population, which is valuable for the conservation of such a species’ genetic resources. A total of 145 samples of the Creole goat was taken from the four biotypes previously identified. Genetic analyses were performed using 38 microsatellites recommended for studies of goat genetic diversity (FAO-ISAG). The results of within-breed genetic diversity showed a mean number of alleles per locus (MNA) of 8, an effective number of alleles (Ae) of 4.3, an expected heterozygosity (He) of 0.71, an observed heterozygosity (Ho) of 0.63, polymorphic information content (PIC) of 0.67, and an FIS value of 0.11. Between-breed genetic diversity among 43 goat populations (native of Spain, American Creole, Europeans, and Africans) showed the following values: FIS = 0.087, FIT = 0.176, and FST = 0.098. Regarding the analysis of the population structure, the results showed that the Creole Chusca Lojana goat population is homogeneous and no genetic separation was observed between the different biotypes (FST = 0.0073). In conclusion, the Chusca Lojana goat has a high genetic diversity, without exhibiting a genetic substructure. Therefore, it should be considered as a distinct population because crossbreeding with other breeds was not detected.
Keywords: Capra hircus, biodiversity, genetic resources, conservation, microsatellites markers
We want to welcome our newest IGA institutional member, the Breeds of Origin Conservancy.
Breeds of Origin Conservancy is a voluntary organization established in 2016 in Malta. They believe that conservation of the endemic flora and fauna, indigenous breeds; native species and subspecies; and cultivated varieties of trees and plants is vital to preserving the Maltese biodiversity for economic, social, educational, and cultural purposes. Today, these indigenous breeds, endemic species and subspecies, and cultivated varieties of trees and plants are increasingly threatened through commercial agriculture and consumption habits. They are convinced that since the protection and conservation of these breeds, species, subspecies, and varieties are of vital importance to Malta and a part of their national heritage, it is their obligation to ensure their survival.
To learn more about Breeds of Origin Conservancy visit their Facebook page: www.facebook.com/BreedsofOrigin
The Old Irish Goat is Ireland’s indigenous landrace breed, now critically endangered and only found in remote mountain ranges roaming in feral herds. Interbreeding with imported domestic goats has caused major loss of the original the characteristics and adaptations.
The Old Irish Goat is highly adapted to the Irish landscape and climate. The males in particular are impressive animals, featuring – long hair, coiffs, beards and sideburns, and impressive horns. The females have a more delicate frame and a matriarchal role with their lineage being the social thread of the herd. Collectively these attributes make them a fascinating part of Ireland’s natural heritage.
The International Goat Association promotes goat research and development for the benefit of humankind, to alleviate poverty, to promote prosperity and to improve the quality of life.