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
On 22 June at 15:00 CEST, the FAO’s Livestock Environmental Assessment and Performance (FAO LEAP) Partnership will be hosting the webinar Biodiversity and the livestock sector. Mitigating harms and maximizing benefits, on the occasion of the launch of new guidelines on biodiversity.
The event will kick off with the opening remarks by special guests. The LEAP Biodiversity Technical Advisory Group (TAG) leader, Tim McAllister, will present the guidelines. Following a panel discussion with representatives from governments, the private sector, and civil society, participants will have the opportunity to comment and ask questions.
The 90-minute webinar welcomes all livestock stakeholders interested in environmental assessment, including representatives from governments private sector, non-governmental organizations, civil society, investment organizations, standardization bodies, academia, research and foundations.
Register here: https://fao.zoom.us/webinar/register/WN_oKlc68VMToKsf3zQS9kmew
Read more: http://www.fao.org/partnerships/leap/news-and-events/events/webinars/biodiversity-and-the-livestock-sector/en/
15:00 - 15:05 – Welcome address
15:05 - 15:25 – Opening remarks
15:25 - 15:45 – Keynote presentation – Biodiversity and the livestock sector. Guidelines for quantitative assessment
15:45 - 16:05 – Panel discussion – Application of the FAO LEAP biodiversity guidelines
16:05 - 16:25 – Q&A
16:25 - 16:30 – Closing remark
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