Navigation Links
First evidence that the genome can adapt to temperature changes
Date:6/5/2013

The researchers have been tracking the evolution of Drosophila subobscura, a small fly that is very common all over Europe, since 1976. They are focusing on a specific type of genomic variability known as chromosomal inversion polymorphism. The study has compared how the flies' genomes change from spring to summer, summer to autumn and autumn to spring, over the years.

In pre-2011 studies of one of D. subobscura's five chromosome pairs, performed in a population near the town of Santiago de Compostela, the researchers observed that this type of adaptation is related to changes in environmental temperature. Two types of genetic variation were identified: one that adapts to the cold, since its frequency always increases in winter, and another that adapts to heat, showing the opposite behaviour pattern. The relative frequency of both types of variation was seen to have evolved in consonance with climate changes. Present-day flies present more heat-tolerant varieties than those of the 70s.

In April, 2011, monitoring coincided with the intense heatwave that struck western Europe and other parts of the world. The study was widened to cover not only the original chromosome pair but all the species' five chromosome pairs, and fly samples were collected from another population, in Gordexola, near Bilbao. The conclusions could therefore be extrapolated on a genome-wide scale and on a geographical scale, to the northern third of Spain.

In an article in the prestigious journal Biology Letters, of the British Royal Society, the researchers show that the 2011 heatwave dramatically altered the genetic constitution of natural populations of Drosophila subobscura. In the middle of spring, and over a single generation, the populations acquired a genetic constitution typical of the summer, because of the heatwave.

According to the study's findings, the difference in reproductive success between genotypes that were sensitive to the heatwave and those that were resistant to it was extremely high: during the heatwave, flies carrying genomic variants tolerant to the temperature increase left on average five times more descendents than those with variants that were sensitive to these changes.

It was also observed that, after the heatwave, the populations recovered their previous genetic make-up. This shows that some organisms possess high genetic resilience to this type of environmental disturbance.

"Our results indicate that resistance to heat has a genetic origin. However, we are not suggesting there is a gene for cold or a gene for heat, but rather that genetic factors for heat resistance are distributed throughout the genome, in these organisms at least", points out Francisco Rodriguez-Trelles, the UAB researcher who coordinated the study. "Our findings are substantial proof that the rise in temperature is affecting the evolution of certain species".


'/>"/>

Contact: Octavi López Coronado
octavi.lopez@uab.cat
34-935-813-301
Universitat Autonoma de Barcelona
Source:Eurekalert

Related biology news :

1. First dual-action compound kills cancer cells, stops them from spreading
2. Thermal limit for animal life redefined by first lab study of deep-sea vent worms
3. Emory, Georgia Tech receive first human exposome center grant in US
4. First successful treatment of pediatric cerebral palsy with autologous cord blood
5. Gym class reduces probability of obesity, study finds for first time
6. First Atlanta Science Festival set for 2014
7. Bowman Design Group is first US company awarded German FAMAB Sustainable Company certification
8. European support for the first network of research and training in political ecology
9. CNIO researchers capture the replication of the human genome for the first time
10. Odd experiments by Americas first physiologist shed light on digestion
11. Aware, Inc. Reports First Quarter 2013 Financial Results
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/12/2017)...  Trovagene, Inc. (NASDAQ: TROV ), a ... that it has signed agreements with seven strategic partners ... Middle East for commercialization of the ... wave of international distribution agreements for Trovagene,s CLIA based ... The initial partners will introduce Trovagene,s liquid biopsy ...
(Date:1/11/2017)... -- Michael Johnson, co-founder of Visikol Inc. a company originally funded with ... to the elite "Forbes 30 Under 30" list in the Science ... 20 fields nationwide to be recognized as a leader in business ... ... a PhD candidate at Rutgers University. Visikol ...
(Date:1/4/2017)... thousands of attendees at this year,s International Consumer Electronics Show (CES), ... devices and services, will be featuring its new line of ULTRA CONNECT ... special CES Exhibit Suite , the new upper arm and wrist smart ... product platform.  Continue Reading ... ...
Breaking Biology News(10 mins):
(Date:1/11/2017)... ... ... Back pain relief technology is now available without a prescription at What ... relief for WAR members. , This spinal restoration platform boasts utilization of technology that ... suffering from chronic back pain. , What A Relief Back Pain Centers ...
(Date:1/11/2017)... , PITTSBURGH and BENGALURU, ... (NASDAQ, TASE: MYL) and Biocon Ltd. (BSE code: 532523, ... Drug Administration (FDA) has accepted Mylan,s biologics license application ... through the 351(k) pathway. This product is a proposed ... certain HER2-positive breast cancers. The anticipated FDA goal date ...
(Date:1/11/2017)... , Jan. 11, 2017  GenVec, Inc. ... delivery company, announced today that its chief scientific ... a talk entitled  "AdenoVerse™ platform for translational development ... Biotech Showcase at the upcoming Phacilitate Cell & ... Miami , Florida.  Dr. Brough,s presentation will ...
(Date:1/11/2017)... (PRWEB) , ... January 11, 2017 , ... ... signed a multi-year license agreement with Poseida Therapeutics Inc, the San Diego based ... genetic data. Poseida Therapeutics selected KBioBox in order to harness KBioBox’s powerful BioEngine ...
Breaking Biology Technology: