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John H Werren - One of the best experts on this subject based on the ideXlab platform.
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phylogeny of cytoplasmic incompatibility microorganisms in the parasitoid wasp genus nasonia hymenoptera pteromalidae based on 16s ribosomal dna sequences
Insect Molecular Biology, 1992Co-Authors: J A J Breeuwer, William G Weisburg, Richard Stouthamer, Susan M Barns, Dale A Pelletier, John H WerrenAbstract:Cytoplasmic incompatibility results in Embryo Mortality in diploids, or all male offspring in haplodiploids, when individuals carrying different cytoplasmic factors are crossed. Cytoplasmic factors have been identified as intracellular micro-organisms. Microbeinduced cytoplasmic incompatibility is found in many insect taxa and may play a role in reproductive isolation between populations. Such micro-organisms cause bidirectional incompatibility between species of the parasitoid wasp genus Nasonia. The phylogenetic relationship of cytoplasmic incompatibility microorganisms (CIM) of different Nasonia species was analysed using their 16S ribosomal DNA (rDNA) sequence. Two 16S rDNA operons were detected in the CIM of each Nasonia species. Sequence analysis indicates that the Nasonia CIM are closely related and belong to the alpha group of the Proteobacteria.
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phylogeny of cytoplasmic incompatibility micro organisms in the parasitoid wasp genus nasonia hymenoptera pteromalidae based on 16s ribosomal dna sequences
Insect Molecular Biology, 1992Co-Authors: J A J Breeuwer, William G Weisburg, Richard Stouthamer, Susan M Barns, Dale A Pelletier, John H WerrenAbstract:Cytoplasmic incompatibility results in Embryo Mortality in diploids, or all male offspring in haplodiploids, when individuals carrying different cytoplasmic factors are crossed. Cytoplasmic factors have been identified as intracellular micro-organisms. Microbeinduced cytoplasmic incompatibility is found in many insect taxa and may play a role in reproductive isolation between populations. Such micro-organisms cause bidirectional incompatibility between species of the parasitoid wasp genus Nasonia. The phylogenetic relationship of cytoplasmic incompatibility microorganisms (CIM) of different Nasonia species was analysed using their 16S ribosomal DNA (rDNA) sequence. Two 16S rDNA operons were detected in the CIM of each Nasonia species. Sequence analysis indicates that the Nasonia CIM are closely related and belong to the alpha group of the Proteobacteria.
Wolfgang Forstmeier - One of the best experts on this subject based on the ideXlab platform.
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proximate causes of infertility and Embryo Mortality in captive zebra finches
The American Naturalist, 2020Co-Authors: Yifan Pei, Wolfgang Forstmeier, Daiping Wang, Katrin Martin, Joanna Rutkowska, Bart KempenaersAbstract:AbstractSome species show high rates of reproductive failure, which is puzzling because natural selection works against such failure in every generation. Hatching failure is common in both captive ...
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proximate causes of infertility and Embryo Mortality in captive zebra finches
bioRxiv, 2019Co-Authors: Yifan Pei, Wolfgang Forstmeier, Daiping Wang, Katrin Martin, Joanna Rutkowska, Bart KempenaersAbstract:Abstract Some species show high rates of reproductive failure, which is puzzling because natural selection works against such failure in every generation. Hatching failure is common in both captive and wild zebra finches (Taeniopygia guttata), yet little is known about its proximate causes. Here we analyze data on reproductive performance (fate of >23,000 eggs) based on up to 14 years of breeding of four captive zebra finch populations. We find that virtually all aspects of reproductive performance are negatively affected by inbreeding (mean r = -0.117), by an early-starting, age-related decline (mean r = -0.132), and by poor early-life nutrition (mean r = - 0.058). However, these effects together explain only about 3% of the variance in infertility, offspring Mortality, fecundity and fitness. In contrast, individual repeatability of different fitness components varied between 15% and 50%. As expected, we found relatively low heritability in fitness components (median: 7% of phenotypic, and 29% of individually repeatable variation). Yet, some of the heritable variation in fitness appears to be maintained by antagonistic pleiotropy (negative genetic correlations) between male fitness traits and female and offspring fitness traits. The large amount of unexplained variation suggests a potentially important role of local dominance and epistasis, including the possibility of segregating genetic incompatibilities.
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fitness consequences of polymorphic inversions in the zebra finch genome
Genome Biology, 2016Co-Authors: Bart Kempenaers, Ulrich Knief, Georg Hemmrichstanisak, Michael Wittig, Andre Franke, Simon C Griffith, Wolfgang ForstmeierAbstract:Background Inversion polymorphisms constitute an evolutionary puzzle: they should increase Embryo Mortality in heterokaryotypic individuals but still they are widespread in some taxa. Some insect species have evolved mechanisms to reduce the cost of Embryo Mortality but humans have not. In birds, a detailed analysis is missing although intraspecific inversion polymorphisms are regarded as common. In Australian zebra finches (Taeniopygia guttata), two polymorphic inversions are known cytogenetically and we set out to detect these two and potentially additional inversions using genomic tools and study their effects on Embryo Mortality and other fitness-related and morphological traits.
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fitness consequences of polymorphic inversions in the zebra finch genome
Genome Biology, 2016Co-Authors: Bart Kempenaers, Ulrich Knief, Georg Hemmrichstanisak, Michael Wittig, Andre Franke, Simon C Griffith, Wolfgang ForstmeierAbstract:Inversion polymorphisms constitute an evolutionary puzzle: they should increase Embryo Mortality in heterokaryotypic individuals but still they are widespread in some taxa. Some insect species have evolved mechanisms to reduce the cost of Embryo Mortality but humans have not. In birds, a detailed analysis is missing although intraspecific inversion polymorphisms are regarded as common. In Australian zebra finches (Taeniopygia guttata), two polymorphic inversions are known cytogenetically and we set out to detect these two and potentially additional inversions using genomic tools and study their effects on Embryo Mortality and other fitness-related and morphological traits. Using whole-genome SNP data, we screened 948 wild zebra finches for polymorphic inversions and describe four large (12–63 Mb) intraspecific inversion polymorphisms with allele frequencies close to 50 %. Using additional data from 5229 birds and 9764 eggs from wild and three captive zebra finch populations, we show that only the largest inversions increase Embryo Mortality in heterokaryotypic males, with surprisingly small effect sizes. We test for a heterozygote advantage on other fitness components but find no evidence for heterosis for any of the inversions. Yet, we find strong additive effects on several morphological traits. The mechanism that has carried the derived inversion haplotypes to such high allele frequencies remains elusive. It appears that selection has effectively minimized the costs associated with inversions in zebra finches. The highly skewed distribution of recombination events towards the chromosome ends in zebra finches and other estrildid species may function to minimize crossovers in the inverted regions.
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Fitness Benefits of Mate Choice for Compatibility in a Socially Monogamous Species
PLOS Biology, 2015Co-Authors: Malika Ihle, Bart Kempenaers, Wolfgang ForstmeierAbstract:Research on mate choice has primarily focused on preferences for quality indicators, assuming that all individuals show consensus about who is the most attractive. However, in some species, mating preferences seem largely individual-specific, suggesting that they might target genetic or behavioral compatibility. Few studies have quantified the fitness consequences of allowing versus preventing such idiosyncratic mate choice. Here, we report on an experiment that controls for variation in overall partner quality and show that zebra finch (Taeniopygia guttata) pairs that resulted from free mate choice achieved a 37% higher reproductive success than pairs that were forced to mate. Cross-fostering of freshly laid eggs showed that Embryo Mortality (before hatching) primarily depended on the identity of the genetic parents, whereas offspring Mortality during the rearing period depended on foster-parent identity. Therefore, preventing mate choice should lead to an increase in Embryo Mortality if mate choice targets genetic compatibility (for Embryo viability), and to an increase in offspring Mortality if mate choice targets behavioral compatibility (for better rearing). We found that pairs from both treatments showed equal rates of Embryo Mortality, but chosen pairs were better at raising offspring. These results thus support the behavioral, but not the genetic, compatibility hypothesis. Further exploratory analyses reveal several differences in behavior and fitness components between “free-choice” and “forced” pairs.
J A J Breeuwer - One of the best experts on this subject based on the ideXlab platform.
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phylogeny of cytoplasmic incompatibility microorganisms in the parasitoid wasp genus nasonia hymenoptera pteromalidae based on 16s ribosomal dna sequences
Insect Molecular Biology, 1992Co-Authors: J A J Breeuwer, William G Weisburg, Richard Stouthamer, Susan M Barns, Dale A Pelletier, John H WerrenAbstract:Cytoplasmic incompatibility results in Embryo Mortality in diploids, or all male offspring in haplodiploids, when individuals carrying different cytoplasmic factors are crossed. Cytoplasmic factors have been identified as intracellular micro-organisms. Microbeinduced cytoplasmic incompatibility is found in many insect taxa and may play a role in reproductive isolation between populations. Such micro-organisms cause bidirectional incompatibility between species of the parasitoid wasp genus Nasonia. The phylogenetic relationship of cytoplasmic incompatibility microorganisms (CIM) of different Nasonia species was analysed using their 16S ribosomal DNA (rDNA) sequence. Two 16S rDNA operons were detected in the CIM of each Nasonia species. Sequence analysis indicates that the Nasonia CIM are closely related and belong to the alpha group of the Proteobacteria.
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phylogeny of cytoplasmic incompatibility micro organisms in the parasitoid wasp genus nasonia hymenoptera pteromalidae based on 16s ribosomal dna sequences
Insect Molecular Biology, 1992Co-Authors: J A J Breeuwer, William G Weisburg, Richard Stouthamer, Susan M Barns, Dale A Pelletier, John H WerrenAbstract:Cytoplasmic incompatibility results in Embryo Mortality in diploids, or all male offspring in haplodiploids, when individuals carrying different cytoplasmic factors are crossed. Cytoplasmic factors have been identified as intracellular micro-organisms. Microbeinduced cytoplasmic incompatibility is found in many insect taxa and may play a role in reproductive isolation between populations. Such micro-organisms cause bidirectional incompatibility between species of the parasitoid wasp genus Nasonia. The phylogenetic relationship of cytoplasmic incompatibility microorganisms (CIM) of different Nasonia species was analysed using their 16S ribosomal DNA (rDNA) sequence. Two 16S rDNA operons were detected in the CIM of each Nasonia species. Sequence analysis indicates that the Nasonia CIM are closely related and belong to the alpha group of the Proteobacteria.
William G Weisburg - One of the best experts on this subject based on the ideXlab platform.
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phylogeny of cytoplasmic incompatibility microorganisms in the parasitoid wasp genus nasonia hymenoptera pteromalidae based on 16s ribosomal dna sequences
Insect Molecular Biology, 1992Co-Authors: J A J Breeuwer, William G Weisburg, Richard Stouthamer, Susan M Barns, Dale A Pelletier, John H WerrenAbstract:Cytoplasmic incompatibility results in Embryo Mortality in diploids, or all male offspring in haplodiploids, when individuals carrying different cytoplasmic factors are crossed. Cytoplasmic factors have been identified as intracellular micro-organisms. Microbeinduced cytoplasmic incompatibility is found in many insect taxa and may play a role in reproductive isolation between populations. Such micro-organisms cause bidirectional incompatibility between species of the parasitoid wasp genus Nasonia. The phylogenetic relationship of cytoplasmic incompatibility microorganisms (CIM) of different Nasonia species was analysed using their 16S ribosomal DNA (rDNA) sequence. Two 16S rDNA operons were detected in the CIM of each Nasonia species. Sequence analysis indicates that the Nasonia CIM are closely related and belong to the alpha group of the Proteobacteria.
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phylogeny of cytoplasmic incompatibility micro organisms in the parasitoid wasp genus nasonia hymenoptera pteromalidae based on 16s ribosomal dna sequences
Insect Molecular Biology, 1992Co-Authors: J A J Breeuwer, William G Weisburg, Richard Stouthamer, Susan M Barns, Dale A Pelletier, John H WerrenAbstract:Cytoplasmic incompatibility results in Embryo Mortality in diploids, or all male offspring in haplodiploids, when individuals carrying different cytoplasmic factors are crossed. Cytoplasmic factors have been identified as intracellular micro-organisms. Microbeinduced cytoplasmic incompatibility is found in many insect taxa and may play a role in reproductive isolation between populations. Such micro-organisms cause bidirectional incompatibility between species of the parasitoid wasp genus Nasonia. The phylogenetic relationship of cytoplasmic incompatibility microorganisms (CIM) of different Nasonia species was analysed using their 16S ribosomal DNA (rDNA) sequence. Two 16S rDNA operons were detected in the CIM of each Nasonia species. Sequence analysis indicates that the Nasonia CIM are closely related and belong to the alpha group of the Proteobacteria.
Richard Stouthamer - One of the best experts on this subject based on the ideXlab platform.
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phylogeny of cytoplasmic incompatibility microorganisms in the parasitoid wasp genus nasonia hymenoptera pteromalidae based on 16s ribosomal dna sequences
Insect Molecular Biology, 1992Co-Authors: J A J Breeuwer, William G Weisburg, Richard Stouthamer, Susan M Barns, Dale A Pelletier, John H WerrenAbstract:Cytoplasmic incompatibility results in Embryo Mortality in diploids, or all male offspring in haplodiploids, when individuals carrying different cytoplasmic factors are crossed. Cytoplasmic factors have been identified as intracellular micro-organisms. Microbeinduced cytoplasmic incompatibility is found in many insect taxa and may play a role in reproductive isolation between populations. Such micro-organisms cause bidirectional incompatibility between species of the parasitoid wasp genus Nasonia. The phylogenetic relationship of cytoplasmic incompatibility microorganisms (CIM) of different Nasonia species was analysed using their 16S ribosomal DNA (rDNA) sequence. Two 16S rDNA operons were detected in the CIM of each Nasonia species. Sequence analysis indicates that the Nasonia CIM are closely related and belong to the alpha group of the Proteobacteria.
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phylogeny of cytoplasmic incompatibility micro organisms in the parasitoid wasp genus nasonia hymenoptera pteromalidae based on 16s ribosomal dna sequences
Insect Molecular Biology, 1992Co-Authors: J A J Breeuwer, William G Weisburg, Richard Stouthamer, Susan M Barns, Dale A Pelletier, John H WerrenAbstract:Cytoplasmic incompatibility results in Embryo Mortality in diploids, or all male offspring in haplodiploids, when individuals carrying different cytoplasmic factors are crossed. Cytoplasmic factors have been identified as intracellular micro-organisms. Microbeinduced cytoplasmic incompatibility is found in many insect taxa and may play a role in reproductive isolation between populations. Such micro-organisms cause bidirectional incompatibility between species of the parasitoid wasp genus Nasonia. The phylogenetic relationship of cytoplasmic incompatibility microorganisms (CIM) of different Nasonia species was analysed using their 16S ribosomal DNA (rDNA) sequence. Two 16S rDNA operons were detected in the CIM of each Nasonia species. Sequence analysis indicates that the Nasonia CIM are closely related and belong to the alpha group of the Proteobacteria.