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Frequency distribution of some common genetic traits and their inheritance at family levels in Rajshahi District

Rajshahi University Zoological Society
Publication Date
  • Zoology
  • Frequency Distribution
  • Genetic Traits
  • Genotype
  • Patterns Of Inheritance
  • Agricultural Science
  • Design
  • Medicine


Microsoft Word - 01.doc Univ. j. zool. Rajshahi Univ. Vol. 26, 2007. pp. 1-19 ISSN 1023-6104 © Rajshahi University Zoological Society Review Article Wolbachia-mediated reproductive alterations in invertebrate hosts and biocontrol implications of the bacteria: an update M. Saiful Islam* Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, United Kingdom *Present address: Dept. of Zoology, University of Rajshahi, Rajshahi 6205, Bangladesh; e-mail : [email protected] Abstract: Wolbachia are obligatory intracellular bacteria that have evolved to manipulate reproduction and/or metabolism of their arthropod and nematode hosts in a number of ways, all designed to the benefit of their own survival and transmission through hosts’ populations. An updated account of the occurrence, identification, phylogeny and genetics, phenotypic effects, distribution, mechanisms of action, horizontal transmission, infection dynamics, evolutionary consequences and biocontrol implications of the bacteria are presented. Associations between these maternally heritable bacteria and their hosts not only cover the entire range of interactions from parasitism to mutualism but also a complex interplay of both. Wolbachia are transmitted vertically from mothers to offspring, and also horizontally within or between arthropod taxa. They are known to induce cytoplasmic incompatibility (CI) via unviable brood, parthenogenesis induction (PI) through asexual reproduction, feminization (F) by converting males into functional females, and male killing (MK) by causing death to sons of the infected mothers. How these bacteria influence host fitness and population dynamics, and could play an important role in speciation have been reviewed. Possible uses of the bacteria and their predominant phenotypes in control programmes for agricultural pests and human disease vectors have been discussed. Key words: Wolbachia, reproduct

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