DOI: 10.1111/ele.12766
Scopus记录号: 2-s2.0-85017384576
论文题名: Shifting barriers and phenotypic diversification by hybridisation
作者: Sefc K.M. ; Mattersdorfer K. ; Ziegelbecker A. ; Neuhüttler N. ; Steiner O. ; Goessler W. ; Koblmüller S.
刊名: Ecology Letters
ISSN: 1461023X
EISSN: 1461-0248
出版年: 2017
卷: 20, 期: 5 起始页码: 651
结束页码: 662
语种: 英语
英文关键词: Carotenoid coloration
; Cichlidae
; climate change
; colour pattern
; environmental fluctuations
; genetic admixture
; hybrid speciation
; Lake Tanganyika
; mate choice
; Tropheus
Scopus关键词: Cichlidae
; Tropheus
; Tropheus moorii
; fish protein
; mitochondrial DNA
; animal
; cichlid
; DNA sequence
; genetic variation
; genetics
; hybridization
; metabolism
; phenotype
; phylogeny
; pigmentation
; veterinary
; Zambia
; Animals
; Cichlids
; DNA, Mitochondrial
; Fish Proteins
; Genetic Variation
; Hybridization, Genetic
; Phenotype
; Phylogeny
; Pigmentation
; Sequence Analysis, DNA
; Zambia
英文摘要: The establishment of hybrid taxa relies on reproductive isolation from the parental forms, typically achieved by ecological differentiation. Here, we present an alternative mechanism, in which shifts in the strength and location of dispersal barriers facilitate diversification by hybridisation. Our case study concerns the highly diverse, stenotopic rock-dwelling cichlids of the African Great Lakes, many of which display geographic colour pattern variation. The littoral habitat of these fish has repeatedly been restructured in the course of ancient lake level fluctuations. Genetic data and an experimental cross support the hybrid origin of a distinct yellow-coloured variant of Tropheus moorii from ancient admixture between two allopatric, red and bluish variants. Deficient assortative mating preferences imply that reproductive isolation continues to be contingent on geographic separation. Linking paleolimnological data with the establishment of the hybrid variant, we sketch a selectively neutral diversification process governed solely by rearrangements of dispersal barriers. © 2017 John Wiley & Sons Ltd/CNRS Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/107622
Appears in Collections: 气候减缓与适应
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作者单位: Institute of Zoology, University of Graz, Universitätsplatz 2, Graz, Austria; Institute of Chemistry – Analytical Chemistry, University of Graz, Universitätsplatz 1, Graz, Austria
Recommended Citation:
Sefc K.M.,Mattersdorfer K.,Ziegelbecker A.,et al. Shifting barriers and phenotypic diversification by hybridisation[J]. Ecology Letters,2017-01-01,20(5)