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Edwards, T., Jarchow, C. J., Jones, C. A., & Bonin, K. E. (2010). Tracing genetic lineages of captive desert tortoises in arizona. Journal of Wildlife Management, 74(4), 801–807. 
Added by: Admin (09 May 2010 16:30:56 UTC)   Last edited by: Beate Pfau (19 Aug 2010 16:02:52 UTC)
Resource type: Journal Article
BibTeX citation key: Edwards2010a
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Categories: General
Keywords: Genetik = genetics, Gopherus, Gopherus agassizii, Gopherus berlandieri, Habitat = habitat, Nordamerika = North America, Schildkröten = turtles + tortoises, Testudinidae
Creators: Bonin, Edwards, Jarchow, Jones
Collection: Journal of Wildlife Management
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Views index: 14%
Popularity index: 3.5%
Abstract     
Testudinidae We genotyped 180 captive desert tortoises (Gopherus agassizii) from Kingman (n = 45), Phoenix (n = 113), and Tucson (n = 22), Arizona, USA, to determine if the genetic lineage of captives is associated with that of wild tortoises in the local area (Sonoran Desert). We tested all samples for 16 short tandem repeats and sequenced 1,109 base pairs of mitochondrial DNA (mtDNA). To determine genetic origin, we performed assignment tests against a reference database of 997 desert tortoise samples collected throughout the Mojave and Sonoran Deserts. We found that >40% of our Arizona captive samples were genetically of Mojave Desert or hybrid origin, with the percentage of individuals exhibiting the Mojave genotype increasing as the sample locations approached the California, USA, border. In Phoenix, 11.5% were Sonoran–Mojave crosses, and 8.8% were hybrids between desert tortoise and Texas tortoise (G. berlandieri). Our findings present many potential implications for wild tortoises in the Sonoran Desert of Arizona. Escaped or released captive tortoises with Mojave or hybrid genotypes have the potential to affect the genetic composition of Sonoran wild populations. Genotyping captive desert tortoises could be used to inform the adoption process, and thereby provide additional protection to native desert-tortoise populations in Arizona.
Added by: Admin  Last edited by: Beate Pfau
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