Navigation Links
Another Sexual Attraction is Possible ...

The coming summer vibrates with expressions of insect love and desire. The cicada's songs or the butterflies' bright colours are examples of how an emitting sex attracts conspecific members of the responding sex. Moth odours (pheromones), though less conspicuous for us humans, are also signals by which females guide males towards them, even on the darkest nights. Such mating recognition systems tend to be very specific, hence they are thought to play a major role in the evolution of mating barriers and in the formation of new species.

The fact that conspecific males and females recognize each other by their common use of a highly specific "language" is likely to decrease the fitness of mutants that might use slightly different signals. Such "atypical" individuals would either - and most probably - die without leaving any offspring, or - in the unlikely event that they find a mutant partner - they might found a new line that may eventually become a new species. As such, the offspring of such parents would inherit the mutant communication system of their parents, which could "spark" the divergence leading to the formation of a new species.

The European corn borer, Ostrinia nubilalis, is a model species that is particularly well-suited to study the first steps along the road to speciation and the deep mysteries of reciprocal attraction - or lack thereof - between potentially interfertile individuals. Indeed, two types of females and two corresponding types of males coexist within this species: one type communicates with the so-called "E" pheromone while the other communicates with the "Z" pheromone. Although hybrid matings produce perfectly viable offspring, both types very rarely mate in nature. At a first glance, it is tempting to believe that this is due to their different pheromones.

However, in a study published in the June 20th issue of the online, open-access journal PLoS ONE, researchers from the Institut National de l a Recherche Agronomique, from the Centre National de la Recherche Scientifique and from the University of Toulouse show that, while pheromones are probably used for meeting, they may not be used for mating per se. Performing crosses and backcrosses between different pheromone races of this moth, they obtained groups of individuals sharing the same pheromone type but differing in their overall genetic relatedness with the "pure" races, and, conversely, groups of individuals sharing a very similar genetic background but using different pheromones. The former were expected all to show similar mating performances with a group of pure-race individuals - but they didn't. The latter were expected to show differences in mating succes s with pure-race individuals - but, again, they didn't. Therefore, overall relatedness rather than pheromone type seems a good predictor of the ability to mate, at least within this species studied here.

These results suggest that the role of pheromone divergence in speciation may not be quite as strong as previously thought - at least within this model species - since another recognition system seems to coexist and constitute a powerful mating barrier. Why, then, don't the corn borer Capulets and Montagues mate more often" So far, the researchers can only dream of their next findings....


'"/>




Related medicine news :

1. Another ray of hope for Arthritis Sufferers
2. Another injectable contraceptive Pill approved by FDA
3. The Possibility Of Fighting HIV with Another Virus Questioned
4. New Research Has Found Another Use For Botox
5. Yet Another Harmful Consequence Of Smoking
6. Another Treatment Option for Benign Tumors
7. Yet Another Treatment Option For Cancer
8. Another Alternative For Diabetics On Insulin
9. Another Use For Epilepsy Drugs
10. Another Cause of Thyroid Cancer Discovered
11. Yet Another Use For Cell Phone Cameras
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:1/21/2017)... ... January 21, 2017 , ... Phytocéane invites ... isolated from the rest of the world with ZANZIBAR SHOWER GEL. Inspired by the ... key ingredients, Virgin Coconut Oil and moisturizing vegetal coral to create this gentle, crystal-clear ...
(Date:1/21/2017)... ... 21, 2017 , ... The Nobel Biocare™ dental implant company ... for its creos™ line of bone regenerative products. Specifically, the Nobel ... utilizes creos™ allo.gain™ bone graft for a variety of bone reconstruction procedures. In ...
(Date:1/20/2017)... ... January 20, 2017 , ... Doctor C LLC, a ... the January ECRM trade show to continue the marketing and distribution of its product, ... known for providing 400 percent better absorption than traditional vitamin C supplements. At the ...
(Date:1/20/2017)... ... January 20, 2017 , ... Michael and Betsy Brauser celebrated 5 years of ... the clinical trial has been life-saving as she has been on the trial ... Brauser was diagnosed with ovarian cancer in 2009. She underwent standard chemotherapy but a ...
(Date:1/20/2017)... ... ... Chocolate Biscuit”: a biographical account following a man who went on to support his country ... Ivey, born in Lynn Haven, Florida and at the age of 5, his family moved ... he joined the Navy and got married right out of boot camp. , He ...
Breaking Medicine News(10 mins):
(Date:1/20/2017)... -- Entscheidung fällt als Reaktion ... Die internationale humanitäre Stadt soll um knapp 2800 m² erweitert ... Seine Hoheit Scheich Muhammad bin Raschid Al ... Dubai , hat den Auftrag erteilt, ... City IHC) zu verdreifachen, um den Betrieb zur Unterstützung ...
(Date:1/19/2017)... -- Report Details What can be expected ... to grow at the fastest rates? This visiongain report ... opportunities and prospects. Our 190-page report provides 124 ... in the industry and the future market prospects. Our ... all the major categories of the ophthalmic devices market. ...
(Date:1/19/2017)... Jan. 19, 2017 Report Details ... Alzheimer,s ... Leading Companies – our new study reveals trends, R&D ... and events affecting the Alzheimer,s disease therapeutics and diagnostics ... these key questions: - How is the Alzheimer,s disease ...
Breaking Medicine Technology: