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:6/14/2017)... , June 15, 2017  IBM (NYSE: IBM ) ... international tech event dedicated to developing collaboration between startups and ... on June 15-17. During the event, nine startups will showcase ... value in various industries. France ... the international market, with a 30 percent increase in the ...
(Date:5/6/2017)... 2017 RAM Group , Singaporean ... breakthrough in biometric authentication based on a ... to perform biometric authentication. These new sensors are based ... by Ram Group and its partners. This sensor will ... chains and security. Ram Group is a next ...
(Date:4/17/2017)... 2017 NXT-ID, Inc. (NASDAQ: NXTD ) ... of its 2016 Annual Report on Form 10-K on Thursday April ... ... in the Investor Relations section of the Company,s website at ... at http://www.sec.gov . 2016 Year Highlights: ...
Breaking Biology News(10 mins):
(Date:9/20/2017)... ... ... Diversity focused business accelerator, The Refinery , announced today they are ... top technology-driven, women-led startups in Boston, MA, New Haven/Hamden, CT, and Newark, NJ. ... on that week – in Boston, it will be part of the City of ...
(Date:9/20/2017)... ... 2017 , ... From industry leaders, sports stars, and Hollywood icons to thousands ... these people had lost all hope. Their stories are told here. , ... , “Neil takes readers on a riveting journey through the past, present and ...
(Date:9/19/2017)... ... September 19, 2017 , ... Participants ... and a high-performance fume hood. Along with the advantages and disadvantages of ductless, ... vs. ducted hoods in the laboratory. , Attendees will learn from an industry ...
(Date:9/19/2017)... ... September 19, 2017 , ... ... is about to be eliminated, said Lyle Probst, President, CEO and Founder of ... different than other pathogen detection solutions, Probst said, “Sample preparation takes place ...
Breaking Biology Technology:
Cached News: