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Wolbachia bacteria UPSC NOTE

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  Why in news Shenyang Agricultural University researchers noticed that in the wild, Encarsiaformosa wasps almost never produced males.  In ...

 Why in news

  • Shenyang Agricultural University researchers noticed that in the wild, Encarsiaformosa wasps almost never produced males. 

  • In the laboratory, however, they found that if the female wasp was treated with tetracycline, an antibiotic, almost 70% of the progeny were male

  • A paper in the journal Current Biology showed that Wolbachia bacteria had manipulated the wasp Encarsia formosa to entirely get rid of its males

Wolbachia bacteria

  • Wolbachia is a genus of gram-negative bacteria that can either infect many species of arthropod as an intracellular parasite, or act as a mutualistic microbe in filarial nematodes

  • It is one of the most common parasitic microbes of arthropods, and is possibly the most common reproductive parasite in the biosphere.

  • Its interactions with its hosts are often complex. 

  • Some host species cannot reproduce, or even survive, without Wolbachia colonisation

  • Wolbachia bacteria were shown to be smart enough to double the chromosome number in their host’s unfertilised eggs and to supply them with ‘tra gene’

  • In Wasps, Wolbachia bacteria can induce unfertilised eggs to somehow double the chromosome number and enable development of female wasps. 

  • It is not known how the bacteria do this, but this renders males superfluous


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Learnerz IAS | Concept oriented UPSC Classes in Malayalam: Wolbachia bacteria UPSC NOTE
Wolbachia bacteria UPSC NOTE
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