Genomic conflict in scale insects: the causes and consequences of bizarre genetic systems

@article{Ross2010GenomicCI,
  title={Genomic conflict in scale insects: the causes and consequences of bizarre genetic systems},
  author={L. Ross and I. Pen and D. Shuker},
  journal={Biological Reviews},
  year={2010},
  volume={85}
}
It is now clear that mechanisms of sex determination are extraordinarily labile, with considerable variation across all taxonomic levels. This variation is often expressed through differences in the genetic system (XX‐XY, XX‐XO, haplodiploidy, and so on). Why there is so much variation in such a seemingly fundamental process has attracted much attention, with recent ideas concentrating on the possible role of genomic conflicts of interest. Here we consider the role of inter‐ and intra‐genomic… Expand
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References

SHOWING 1-10 OF 151 REFERENCES
The evolution of unusual chromosomal systems in coccoids: extraordinary sex ratios revisited
TLDR
A model of the evolution of paternal genome loss in coccoids from an ancestral system of XX‐XO sex determination is presented, based on Hamilton's (1967) theory that different genetic elements within the genome have different unbeatable sex ratios. Expand
Musca domestica, a window on the evolution of sex-determining mechanisms in insects.
TLDR
In the house fly, Sex-lethal is not involved in sex determination, and dosage compensation, if existent at all, is not coupled with sexual differentiation, which allows for more adaptive plasticity in the housefly system. Expand
Can maternally transmitted endosymbionts facilitate the evolution of haplodiploidy?
TLDR
It is found that both with male‐killers and CI‐inducing endosymbionts, the hosts are likely to develop increased viability of haploid males, which can be considered a preadaptation to haplodiploidy. Expand
Maternal-zygotic gene conflict over sex determination: effects of inbreeding.
TLDR
It is shown that maternal-effect and zygotic genes are subject to conflicting selective pressures over sex determination in species with partial inbreeding or subdivided populations. Expand
SEX DETERMINATION, SEX RATIOS AND GENETIC CONFLICT
TLDR
There is growing evidence that genetic conflict could be important in the evolution of sex-determining mechanisms, including sex chromosome drive, cytoplasmic sex-ratio distortion, and cytop lasmic male sterility in plants. Expand
Turnover of sex chromosomes induced by sexual conflict
TLDR
In this theoretical study, it is shown that an autosomal gene under sexually antagonistic selection can cause the spread of a new sex-determining gene linked to it, which can account for the origin of newSex-Determining loci, the transposition of an ancestral sex-D determining gene to an autosome, and the maintenance of multiple sex- determining factors in species that lack heteromorphic sex chromosomes. Expand
HAPLODIPLOIDY AS AN OUTCOME OF COEVOLUTION BETWEEN MALE‐KILLING CYTOPLASMIC ELEMENTS AND THEIR HOSTS
  • B. Normark
  • Biology, Medicine
  • Evolution; international journal of organic evolution
  • 2004
TLDR
This hypothesis helps to explain the ecological correlates of the origins of haplodiploidsy, as well as such otherwise puzzling phenomena as obligate cannibalism by male Micromalthus beetles, reversion to diploidy by aposymbiotic male stictococcid scale insects, and the bizarre genomic constitution of scale insect bacteriomes. Expand
The evolution of alternative genetic systems in insects.
  • B. Normark
  • Biology, Medicine
  • Annual review of entomology
  • 2003
TLDR
A classification of the genetic systems of insects and the number of evolutionary transitions between them is presented and available evidence tends to support W.D. Hamilton's hypothesis that maternally transmitted endosymbionts have been involved in the origins of haplodiploidy. Expand
13 – Unusual gametic and genetic systems
TLDR
This chapter considers systems in which the parentage of diploid offspring is not shared equally between the sperm and the egg but instead is monopolized by one or the other. Expand
Sexual conflict, sex allocation and the genetic system
TLDR
This work considers how biased gene transmission, as expressed in different genetic systems, enhances the opportunity for sex ratio conflict and gives empirical examples that confirm that males and females have the opportunity to influence sex ratios. Expand
...
1
2
3
4
5
...