Morphological evolution and genetic differentiation in Daphnia species complexes

被引:0
|
作者
Giessler, S
Mader, E
Schwenk, K
机构
[1] LMU Munchen, Inst Zool, Abt Okol, D-80333 Munich, Germany
[2] Netherlands Inst Ecol, Ctr Limnol, NL-3631 AC Nieuwersluis, Netherlands
关键词
allozymes; mitochondrial DNA; molecular phylogenies; phenotypic evolution; reticulate evolution;
D O I
暂无
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Despite many ecological and evolutionary studies, the history of several species complexes within the freshwater crustacean genus Daphnia (Branchiopoda, Anomopoda) is poorly understood. In particular, the Daphnia longispina group, comprising several large-lake species, is characterized by pronounced phenotypic plasticity, many hybridizing species arid backcrossing. We studied clonal assemblages from lakes and ponds comprising daphnids from several species complexes. In order to reveal patterns of reticulate evolution and introgression among species, we analysed three data sets and compared nuclear, mtDNA and morphological divergence using animals from 158 newly established clonal cultures. By examining 15 nuclear and II mitochondrial (12S/16S rDNA) genetic characters (allozymes/restriction enzymes), and 48 morphological traits, we found high clonal diversity and discontinuities in genotypic and morphological space which allowed us to group clones by cytonuclear differentiation into seven units (outgroup D. pulex). In contrast to six groups emerging from nuclear divergence (related to three traditional species, D. cucullata D. galeata, D. hyalina and three pairwise intermediate hybrids), a seventh group of clones was clearly resolved by morphological divergence: distinct mtDNA haplotypes within one nuclear defined cluster, 'D. hyalina', resembled traditional D; hyalina and D. rosea phenotypes, respectively. In other nuclear defined clusters, association between mtDNA haplotype and morphology was low, despite hybridization being bidirectional (reciprocal crosses). Morphological divergence was greatest between young sister species which are separated on the lake/pond level, suggesting a significant role for divergent selection during speciation along with habitat shifts. Phylogenetic analyses were restricted to four cytonuclear groups of crones related to species. mtDNA and nuclear phylogenies were consistent in low genetic divergence and monophyly of D. hyalina and D. rosea Incongruent patterns of phylogenies and different levels of genetic differentiation between traditional species suggest reticulate evolutionary processes.
引用
收藏
页码:710 / 723
页数:14
相关论文
共 50 条
  • [1] Ecological, morphological, and genetic differentiation of Daphnia (Hyalodaphnia) from the Finnish and Russian subarctic
    Schwenk, K
    Junttila, P
    Rautio, M
    Bastiansen, F
    Knapp, A
    Dove, O
    Billiones, R
    Streit, B
    [J]. LIMNOLOGY AND OCEANOGRAPHY, 2004, 49 (02) : 532 - 539
  • [2] Morphological differentiation within the Daphnia longispina group
    Giessler, S
    [J]. HYDROBIOLOGIA, 2001, 442 (1-3) : 55 - 66
  • [3] Intraspecific spatial genetic differentiation of a Daphnia species within a long narrow reservoir
    Petrusek, Adam
    Seda, Jaromir
    Machacek, Jiri
    Riha, Milan
    Prchalova, Marie
    Schwenk, Klaus
    [J]. HYDROBIOLOGIA, 2013, 715 (01) : 169 - 180
  • [4] Intraspecific spatial genetic differentiation of a Daphnia species within a long narrow reservoir
    Adam Petrusek
    Jaromír Seda
    Jiří Macháček
    Milan Říha
    Marie Prchalová
    Klaus Schwenk
    [J]. Hydrobiologia, 2013, 715 : 169 - 180
  • [5] Genetic differentiation among Oregon lake populations of the Daphnia pulex species complex
    Straughan, DJ
    Lehman, N
    [J]. JOURNAL OF HEREDITY, 2000, 91 (01) : 8 - 17
  • [6] Morphological differentiation within the Daphnia longispina group
    Sabine Gießler
    [J]. Hydrobiologia, 2001, 442 : 55 - 66
  • [7] Genetic differentiation in Daphnia obtusa: A continental perspective
    Hebert, PDN
    Finston, TL
    [J]. FRESHWATER BIOLOGY, 1996, 35 (02) : 311 - 321
  • [8] Genetic and morphological differentiation in the specialist species Anastrepha pickeli and A-montei
    Morgante, JS
    Selivon, D
    Solferini, VN
    doNascimento, AS
    [J]. FRUIT FLY PESTS: A WORLD ASSESSMENT OF THEIR BIOLOGY AND MANAGEMENT, 1996, : 273 - 276
  • [9] Genetic diversity and genetic differentiation in Daphnia metapopulations with subpopulations of known age
    Haag, CR
    Riek, M
    Hottinger, JW
    Pajunen, VI
    Ebert, D
    [J]. GENETICS, 2005, 170 (04) : 1809 - 1820
  • [10] Genetic diversity and morphological differentiation in Liatris helleri (Asteraceae), a threatened plant species
    Godt, MJW
    Hamrick, JL
    [J]. BIODIVERSITY AND CONSERVATION, 1996, 5 (04) : 461 - 471