Mitochondrial sequence diversity reveals the hybrid origin of invasive gibel carp (Carassius gibelio) populations in Hungary

被引:7
|
作者
Keszte, Szilvia [1 ]
Ferincz, Arpad [1 ]
Toth-Ihasz, Katalin [2 ]
Balogh, Reka Eniko [2 ]
Staszny, Adam [1 ]
Hegyi, Arpad [3 ]
Takacs, Peter [4 ]
Urbanyi, Bela [3 ]
Kovacs, Balazs [2 ]
机构
[1] Hungarian Univ Agr & Life Sci, Inst Aquaculture & Environm Safety, Dept Freshwater Fish Ecol, Godollo, Magyarorszag, Hungary
[2] Hungarian Univ Agr & Life Sci, Inst Aquaculture & Environm Safety, Dept Mol Ecol, Godollo, Magyarorszag, Hungary
[3] Hungarian Univ Agr & Life Sci, Inst Aquaculture & Environm Safety, Dept Aquaculture, Godollo, Magyarorszag, Hungary
[4] Balaton Limnol Res Inst, Fish & Conservat Ecol Res Grp, Tihany, Magyarorszag, Hungary
来源
PEERJ | 2021年 / 9卷
关键词
Population genetic; Mitochondrial; Carassius; Hybridization; Taxonomy; FRESH-WATER FISHES; PRUSSIAN CARP; AURATUS-GIBELIO; LAKE BALATON; TELEOSTEI CYPRINIDAE; GENETIC-ANALYSIS; BLOCH; REPRODUCTION; HISTORY;
D O I
10.7717/peerj.12441
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Background. Invasive gibel carp, Carassius gibelio (Bloch, 1782) has become well-established in the Hungarian waters and now are spreading in the European waters. On major concern now is the potential hybridization between gibel carp and the other invasive species in the Carassius auratus complex (CAC), which may further accelerate the spread of the whole invasive species complex. The identification of gibel carp and their hybrids is difficult because of its morphological similarity to the other species in CAC. Here we carry out a genomic assessment to understand the history of gibel carp invasion and its phylogenetic relationship with the other species in CAC. Three loci of the mitochondrial genome (D-loop, CoI, Cytb) were used to determine the phylogenetic origin of individuals and relarionship among six gibel carp populations and the other species in the CAC. Methodolgy. A total of 132 gibel carp samples from six locations in Southern Transdanubia (Hungary) were collected after phenotypic identification to measure the genetic diversity within and among gibel carp populations of Southern Transdanubia (Hungary). The genetic background was examined by the sequences of the mitochondrial genome: D-loop, Cytochrome c oxidase I (CoI) and Cytochrome b (Cytb). Mitochondrial genetic markers are excellent tools for phylogenetic studies because they are maternally inherited. Successfully identified haplotypes were aligned and with reference sequences in nucleotide databases (i.e., NCBI-BLAST: National Centre for Biotechnology Information and BOLD: Barcode of Life Data System). The phylogenetic relationships among gibel carp populations were then analyzed together with the reference sequences to understand the relationship and the level of hybridization with the species in CAC. Results. Among the 132 aligned D-loop sequences 22 haplotypes were identified. Further examination of representative individuals of the 22 haplotypes, six Cytb and four CoI sequences were detected. The largest number of haplotypes of all three loci were found in Lake Balaton, the largest shallow lake in Central Europe. Based on the NCBI-BLAST alignment of the D-loop, haplotypes of Carassius auratus auratus and Carassius a. buergeri in CAC were identified in the C. gibelio samples. Further analysis of haplotypes with the other two mitochondrial markers confirmed the occurrence of intragenus hybridization of C. gibelio in the Hungarian waters. Conclusion. By using three mitochondrial markers (D-loop, Cytb, CoI), we genomically characterized a gibel carp-complex in Hungarian waters and assessed the C. gibelio phylogenetic status between them. Hybrid origin of locally invasive Carassius taxon was detected in Hungary. It points out that invasive species are not only present in Hungary but reproduce with each other in the waters, further accelerating their spread.
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页数:19
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