HOME >> BIOLOGY >> NEWS
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
a.mclaughlin@bath.ac.uk
44-122-538-6883
University of Bath
8-Aug-2005


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:
*Name:
*Comment:
*Email:


(Date:12/20/2016)... , Dec. 20, 2016 The ... sharing, rental and leasing is stoking significant interest ... radio frequency technology, Bluetooth low energy (BLE), biometrics ... as the next wave of wireless technologies in ... access system to advanced access systems opens the ...
(Date:12/16/2016)... 2016 Research and Markets has announced the ... Forecast to 2021" report to their offering. ... The biometric vehicle access system ... CAGR of 14.06% from 2016 to 2021. The market is estimated ... reach 854.8 Million by 2021. The growth of the biometric vehicle ...
(Date:12/15/2016)... 2016 ... Research and Markets has announced the addition of the ... The report forecasts the global military biometrics market to grow at ... report has been prepared based on an in-depth market analysis with inputs ... prospects over the coming years. The report also includes a discussion of ...
Breaking Biology News(10 mins):
(Date:1/16/2017)... ... January 16, 2017 , ... ... prestigious Tibbetts Award from the U.S. Small Business Administration. The Tibbetts ... significant economic or social impact […] and are considered the best of the ...
(Date:1/13/2017)... Research and Markets has announced the addition of the ... ... a CAGR of 16.83% during the period 2017-2021. The ... biopolymers market for 2017-2021. To calculate the market size, the report considers ... report also includes a a discussion of the key vendors operating in ...
(Date:1/12/2017)... ... 2017 , ... Each year, Crain’s Detroit Business News ranks the most innovative ... patent estate of a company, its impact and significance, and the likelihood of bringing ... in technologies that transform energy sources such as low dose X-ray and convert them ...
(Date:1/12/2017)... , Jan. 12, 2017   Protein Sciences ... maker of Flublok Influenza Vaccine ®, announced ... candidate had good safety results and induced strong ... studies. The product is expected to advance into ... In addition, the Institute of Technology in Immunobiologicals ...
Breaking Biology Technology:
Cached News: