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:
(Date:5/14/2015)... , May 14, 2015  Verificient ... identity verification and online remote proctoring, announced ... software-as-a-service (SaaS) company and creator of the ... of the two companies will benefit from ... Canvas. As a fully integrated ...
(Date:5/10/2015)... May 11, 2015 Fingerprint Cards (FPC) ... and FPC1155 from the distributor World Peace Industrial Group (WPI), ... in Asia . Deliveries are planned to ... used by smartphone manufacturers in China . ... communicated revenue guidance of + 1 000 MSEK for 2015.   ...
(Date:5/5/2015)... , May 5, 2015, NXT-ID, Inc. (NASDAQ: ... company focused on the growing mobile commerce market, reminds investors ... Chief Technology Officer, is presenting  at CARTES SECURE CONNEXIONS AMERICA ... 5-7, 2015. The three-day conference is organized ... is speaking in is themed Global Fraud: Where is ...
Breaking Biology News(10 mins):Verificient and Instructure Announce Alliance Partnership to Provide Online Proctoring for K-12 and Higher Education Institutions 2Fingerprint Cards Receives Touch Fingerprint Sensor Order of SEK 235 Million 2NXT-ID, Inc.'s CTO, David Tunnell, Presents at CARTES SECURE CONNEXIONS AMERICA 2015 Today in Washington DC. 2NXT-ID, Inc.'s CTO, David Tunnell, Presents at CARTES SECURE CONNEXIONS AMERICA 2015 Today in Washington DC. 3
(Date:5/21/2015)... MO (PRWEB) May 21, 2015 Seventh ... the safety and efficacy of pharmaceutical products and medical ... Maryland Heights, MO 63043, a 50,000 sq. ft. building ... location, to enable strategic growth. Facility renovations will begin ... the new space will occur in September. , ...
(Date:5/21/2015)... uBiome, the leading startup focused ... PicnicHealth, a healthcare company that collects and consolidates ... Bowel Disease (IBD) will receive a complementary PicnicHealth ... kit. Both companies were funded by Y Combinator ... more information on this partnership and how to ...
(Date:5/21/2015)... 21, 2015 Patent Offering, The patent’s ... diagnostic or therapeutic imaging within a body lumen (open ... endoscope having a low cost, single-use disposable illumination and ... was October 18, 2013 and the patent approval was ... the physician to customize the lighting and magnification of ...
(Date:5/21/2015)... May 21, 2015 /PRNewswire/ - RepliCel Life Sciences ... regenerative medicine company focused on the development of ... presentation at the International Society for Cellular Therapy ... Achilles tendinosis currently in a Phase 1/2 clinical ... th from 5:30 PM to 7:00 PM ...
Breaking Biology Technology:Seventh Wave Laboratories Purchases Building for Expansion, Upcoming Move 2Seventh Wave Laboratories Purchases Building for Expansion, Upcoming Move 3uBiome Partners with PicnicHealth 2uBiome Partners with PicnicHealth 3IpAuctions™ Presents The Worlds Smallest Disposable Illuminated Endoscope For Auction 2IpAuctions™ Presents The Worlds Smallest Disposable Illuminated Endoscope For Auction 3RepliCel to Present Unique Autologous Cell Treatment for Achilles Tendinosis at International Society for Cellular Therapy Conference 2RepliCel to Present Unique Autologous Cell Treatment for Achilles Tendinosis at International Society for Cellular Therapy Conference 3
Cached News: