Genetic analysis reveals the wild ancestors of the llama and the alpaca
Open Access
- 22 December 2001
- journal article
- Published by The Royal Society in Proceedings Of The Royal Society B-Biological Sciences
- Vol. 268 (1485), 2575-2584
- https://doi.org/10.1098/rspb.2001.1774
Abstract
The origins of South America's domestic alpaca and llama remain controversial due to hybridization, near extirpation during the Spanish conquest and difficulties in archaeological interpretation. Traditionally, the ancestry of both forms is attributed to the guanaco, while the vicuña is assumed never to have been domesticated. Recent research has, however, linked the alpaca to the vicuña, dating domestication to 6000–7000 years before present in the Peruvian Andes. Here, we examine in detail the genetic relationships between the South American camelids in order to determine the origins of the domestic forms, using mitochondrial (mt) and microsatellite DNA. MtDNA analysis places 80% of llama and alpaca sequences in the guanaco lineage, with those possessing vicuña mtDNA being nearly all alpaca or alpaca–vicuña hybrids. We also examined four microsatellites in wild known–provenance vicuña and guanaco, including two loci with non–overlapping allele size ranges in the wild species. In contrast to the mtDNA, these markers show high genetic similarity between alpaca and vicuña, and between llama and guanaco, although bidirectional hybridization is also revealed. Finally, combined marker analysis on a subset of samples confirms the microsatellite interpretation and suggests that the alpaca is descended from the vicuña, and should be reclassified as Vicugna pacos. This result has major implications for the future management of wild and domestic camelids in South America.Keywords
This publication has 25 references indexed in Scilit:
- Widespread Origins of Domestic Horse LineagesScience, 2001
- Mitochondrial diversity and the origins of African and European cattle.Proceedings of the National Academy of Sciences of the United States of America, 1996
- Llamas and Alpacas: Pre-conquest breeds and post-conquest hybridsJournal of Archaeological Science, 1995
- Conserving livestock breed biodiversityTrends in Ecology & Evolution, 1995
- Evolution and present situation of the South American camelidaeBiological Journal of the Linnean Society, 1995
- Molecular evolution of the family Camelidae: a mitochondrial DNA studyProceedings Of The Royal Society B-Biological Sciences, 1994
- Time for a changeNature, 1994
- Llamas, herders and the exploitation of raw materials in the Atacama DesertWorld Archaeology, 1991
- On the shortest spanning subtree of a graph and the traveling salesman problemProceedings of the American Mathematical Society, 1956