Black coats in an admixed wolf × dog pack is melanism an indicator of hybridization in wolves?
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- 作者：Romolo Caniglia (1)
Elena Fabbri (1)
Claudia Greco (1)
Marco Galaverni (1)
Lorenzo Manghi (2)
Luigi Boitani (2)
Andrea Sforzi (3)
Ettore Randi (1) - 关键词：Canis lupus ; Wolf × dog hybridization ; β ; Defensin gene ; Coat color polymorphism ; Admixture analysis ; Gene introgression ; Conservation genetics
- 刊名：European Journal of Wildlife Research
- 出版年：2013
- 出版时间：August 2013
- 年：2013
- 卷：59
- 期：4
- 页码：543-555
- 全文大小：443KB
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Elena Fabbri (1)
Claudia Greco (1)
Marco Galaverni (1)
Lorenzo Manghi (2)
Luigi Boitani (2)
Andrea Sforzi (3)
Ettore Randi (1)
1. Laboratorio di Genetica, Istituto Superiore per la Protezione e la Ricerca Ambientale (ISPRA), Via Cà Fornacetta 9, 40064, Ozzano dell’Emilia, BO, Italy
2. Dipartimento di Biologia Animale e dell’Uomo, Università di Roma “La Sapienza- Viale dell’Università 32, 00185, Rome, Italy
3. Museo di Storia Naturale della Maremma, Strada Corsini 5, 58100, Grosseto, Italy
文摘
The use of functional mutations, in addition to standard noncoding molecular markers, can help to detect hybridization and gene introgression in wild canid populations. We analyzed ancestry of a canid pack breeding in Central Italy that showed black coats and other unusual morphological traits suggesting wolf × dog hybrid origins. Individuals were identified by genotyping excremental DNA at 13 autosomal microsatellites, mtDNA control region sequences, a male-specific restriction site on the ZFX/Y gene to determine the gender of the individuals, four Y-linked microsatellites to determine male haplotypes, and two melanistic mutations: a SNP at exon 4 of the Agouti locus and a 3-bp deletion at a β-Defensin gene, the K locus. Results showed that: (1) the pack was founded by a single breeding pair of related individuals, probably brother and sister, and no immigrant was detected; (2) parents and offspring showed signals of admixture at autosomal microsatellites; and (3) the melanistic K locus deletion was present in the black-coated female parent and in 8/14 offspring, but it was absent in the wild type male parent. This deletion was found also in 17/40 village dogs randomly sampled from nearby areas, but it was absent in a random sample of 40 Italian wolves. These findings suggest that the pack received the K locus deletion from dogs. Admixture analyses of empirical and simulated genotypes indicate the parents of the pack originated through a single hybridization event at least two generations back. Genetic and phenotypic assessments of coat color mutations can contribute to investigation of the origin and dynamics of functional polymorphisms in hybridizing wolf populations and to develop appropriate guidelines to contrast hybridization with their domesticated relatives.