DDT-resistant insects have additional genetic advantage that helps resistance spread

le once the pesticide taken out of use and DDT-susceptible insects would regain dominance.

"Although this assumption is widespread, data to support this contention is actually thin," said Professor ffrench-Constant. He believes previous work may not have looked at genetically related strains and that 'costs' may therefore be associated with the differing genetic backgrounds of insects examined, and not the resistance genes themselves.

"Experimenters looking at genetic fitness in resistant insects often only look at single character traits such as number of eggs laid, and often compare resistant and susceptible lines that are genetically unrelated.

"Differences in fitness therefore often correspond to differences in genetic background rather and are not due to the resistance gene itself."

Using DDT-resistant fruit flies (Drosophila melanogaster) in state-of-the-art controlled temperature rooms provided by the Wolfson Trust, Caroline McCart, a PhD student in the Department of Biology and Biochemistry at the University, went to great lengths to make sure that DDT resistant and susceptible strains differed only by the resistance gene itself.

Using antibiotics they also 'cured' the flies of the microbes that are known to affect their ability to reproduce and could affect the results.

In order to assess the genetic fitness of both the resistant and susceptible strains, the researchers monitored the survival and development rate of all life stages of their offspring.

They found that DDT resistance in fruit flies not only carries no cost but in fact confers an advantage when inherited through the female.

This discovery comes at a time when a number of developing nations, including South Africa, are considering re-introducing (or continuing the use of) DDT in an attempt to reduce the major health problems caused by malaria.

Use of DDT (Dichloro-diphenyl-trichloroethane) increased enormously on a worl

Contact: Andrew McLaughlin
University of Bath

Page: 1 2 3

Related biology news :

1. Tropical insects go the distance to inform rainforest conservation
2. For many insects, winter survival is in the genes
3. Do we need a paradigm change? Disputing coevolution in herbivorous insects
4. Why are there so many more species of insects? Because insects have been here longer
5. Identification of carbon dioxide receptors in insects may help fight infectious disease
6. Why do insects like to eat some plants more than others?
7. Biological clock of honey bee more similar to humans than to insects
8. Lennart Nilsson Award for outstanding photography of the world of insects
9. Giant insects might reign if only there was more oxygen in the air
10. New study explains why hotter is better for insects
11. Obesity crisis in insects? Not a problem, says expert

Post Your Comments:

(Date:5/12/2016)... , May 12, 2016 WearablesResearch.com , ... published the overview results from the Q1 wave of ... recent wave was consumers, receptivity to a program where ... with a health insurance company. "We were ... share," says Michael LaColla , CEO of Troubadour ...
(Date:4/26/2016)... LONDON , April 26, 2016 /PRNewswire/ ... Systems, a product subsidiary of Infosys (NYSE: ... partnership to integrate the Onegini mobile security platform ... http://photos.prnewswire.com/prnh/20151104/283829LOGO ) The integration ... security to access and transact across channels. Using ...
(Date:4/14/2016)... Israel , April 14, 2016 ... Authentication and Malware Detection, today announced the appointment of ... assumed the new role. Goldwerger,s leadership appointment ... on the heels of the deployment of its platform ... BioCatch,s behavioral biometric technology, which discerns unique cognitive and ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... 2016 Houston Methodist Willowbrook Hospital has ... Association to serve as their official health care ... Willowbrook will provide sponsorship support, athletic training services, ... coaches, volunteers, athletes and families. "We ... Association and to bring Houston Methodist quality services ...
(Date:6/23/2016)... , June, 23, 2016  The Biodesign Challenge ... envision new ways to harness living systems and biotechnology, ... Art (MoMA) in New York City ... 130 participating students, showcased projects at MoMA,s Celeste Bartos ... Paola Antonelli , MoMA,s senior curator of architecture and ...
(Date:6/23/2016)... , ... June 23, 2016 , ... STACS DNA Inc., ... Leader at the Arkansas State Crime Laboratory, has joined STACS DNA as a Field ... DNA team,” said Jocelyn Tremblay, President and COO of STACS DNA. “In further expanding ...
(Date:6/23/2016)... 23, 2016  Blueprint Bio, a company dedicated to ... medical community, has closed its Series A funding round, ... "We have received a commitment from Forentis ... need to meet our current goals," stated Matthew ... runway to complete validation on the current projects in ...
Breaking Biology Technology:
Cached News: