Deleterious Epistatic Interactions Between Electron Transport System Protein-Coding Loci in the Copepod Tigriopus californicus

From: Genetics | Date: July 1, 2006| Author: Willett, Christopher S | Copyright information

ABSTRACT

The nature of epistatic interactions between genes encoding interacting proteins in hybrid organisms can have important implications for the evolution of postzygotic reproductive isolation and speciation. At this point very little is known about the fitness differences caused by specific closely interacting but evolutionarily divergent proteins in hybrids between populations or species. The intertidal copepod Tigriopus californicus provides an excellent model in which to study...

Read all of this article with a FREE trial to HighBeam Research

Related newspaper, magazine, and journal articles from HighBeam Research

Disruption of Genetic Interaction Between Two Autosomal Regions and the X Chromosome Causes Reproductive Isolation Between Mouse Strains Derived From Different Subspecies
Genetics ; ABSTRACT Reproductive isolation that initiates speciation is likely caused by incompatibility among multiple loci in organisms belonging to genetically diverging populations. Laboratory C57BL/6J mice, which predominantly originated from Mus musculus domesticus, and a MSM/Ms strain derived from
Signatures of Reproductive Isolation in Patterns of Single Nucleotide Diversity Across Inbred Strains of Mice
Genetics ; ABSTRACT Reproductive isolation is often caused by the disruption of genie interactions that evolve in geographically separate populations. Identifying the genomic regions and genes involved in these interactions, known as "Dobzhansky-Muller incompatibilities," can be challenging but is facilitated
Contrasting Patterns of Introgression at X-Linked Loci Across the Hybrid Zone Between Subspecies of the European Rabbit (Oryctolagus cuniculus)
Genetics ; ABSTRACT Hybrid zones provide an excellent opportunity for studying the consequences of genetic changes between closely related taxa. Here we investigate patterns of genetic variability and gene flow at four X-linked loci within and between the two subspecies of European rabbit (Oryctolagus
Fertilization between closely related sea urchins is blocked by incompatibilities during sperm-egg attachment and early stages of fusion.
The Biological Bulletin ; Introduction The relationship between the evolution of reproductive isolation and species formation is complex and differs among taxonomic groups (Mayr, 1963; Donoghue, 1985; Carson.. 1987; Kaneshiro and Boake, 1987; Templeton, 1989). Species are genetically distinct, vet they may sometimes be
Ecological Zones Rather Than Molecular Forms Predict Genetic Differentiation in the Malaria Vector Anopheles gambiae s.s. in Ghana
Genetics ; ABSTRACT The malaria mosquito Anopheles gambiae s.s. is rapidly becoming a model for studies on the evolution of reproductive isolation. Debate has centered on the taxonomic status of two forms (denoted M and S) within the nominal taxon identified by point mutations in the X-linked rDNA region.
Sequence Diversity, Reproductive Isolation and Species Concepts in Saccharomyces
Genetics ; ABSTRACT Using the biological species definition, yeasts of the genus Saccharomyces sensu stricto comprise six species and one natural hybrid. Previous work has shown that reproductive isolation between the species is due primarily to sequence divergence acted upon by the mismatch repair system and
Asymmetric Postmating Isolation: Darwin's Corollary to Haldane's Rule
Genetics ; ABSTRACT Asymmetric postmating isolation, where reciprocal interspecific crosses produce different levels of fertilization success or hybrid sterility/inviability, is very common. Darwin emphasized its pervasiveness in plants, but it occurs in all taxa assayed. This asymmetry often results from
Contrasting Patterns of Polymorphism and Divergence on the Z Chromosome and Autosomes in Two Ficedula Flycatcher Species
Genetics ; ABSTRACT In geographic areas where pied and collared flycatchers (Ficedula hypoleuca and F. albicollis) breed in sympatry, hybridization occurs, leading to gene flow (introgression) between the two recently diverged species. Notably, while such introgression is observable at autosomal loci it is
Chromosomal rearrangement in Pectinidae revealed by rRNA loci and implications for bivalve evolution.
The Biological Bulletin ; Introduction Chromosomal changes, particularly polyploidy, have played a significant role in the evolution of plants, and most higher plants are recent polyploids (DeWit, 1980). Although polyploidy is relatively rare in animals, chromosomal changes are increasingly recognized as an important force
Evaluation of the Genomic Extent of Effects of Fixed Inversion Differences on Intraspecific Variation and Interspecific Gene Flow in Drosophila pseudoobscura and D. persimilis
Genetics ; ABSTRACT There is increasing evidence that chromosomal inversions may facilitate the formation or persistence of new species by allowing genetic factors conferring species-specific adaptations or reproductive isolation to be inherited together and by reducing or eliminating introgression. However,