HOME >> BIOLOGY >> NEWS
Colorful, rare-patterned male guppies have survival advantage in the wild

Any owner of a freshwater aquarium likely has had guppies (Poecilia reticulata), those small brightly colored fish with a propensity for breeding. Now guppy populations manipulated in natural habitats in Trinidad have taught researchers an evolutionary lesson on the survival of a rare genetic trait.

Reporting in the June 1 issue of the journal Nature, scientists from six institutions detail how male guppies with the most colorful -- and most rare -- patterns are more likely than their more commonly colored counterparts to survive in the wild.

"This study provides very solid support for frequency-dependent survival," said principal investigator Kimberly A. Hughes, an animal biologist at the University of Illinois at Urbana-Champaign. "We found that rare color patterns of these guppies had a highly significant survival advantage."

In evolutionary terms, frequency-dependent survival means that individuals with rare gene variants have a survival advantage relative to common variants, simply as a function of being rare. This process is important because it leads to the maintenance of many different variants (polymorphism) in the same population.

The same process could be important in the maintenance of genetic variants in humans, said Hughes, who also is a member of the Institute for Genomic Biology at Illinois. For example, she said, it has been hypothesized that genes involved in pathogen resistance (the Human Leukocyte Antigen or HLA genes) are highly polymorphic because pathogens are most successful at attacking individuals with common variants, and individuals with rare variants have higher survival.

However, the theory is difficult to test, and, in general, frequency-dependent survival has been difficult to document as an important process in nature, Hughes said.

The guppy system provided a way to test whether this kind of selection could really promote polymorphism in a natural setting, because guppies are highly
'"/>

Contact: Jim Barlow, Life Sciences Editor
jebarlow@uiuc.edu
217-333-5802
University of Illinois at Urbana-Champaign
31-May-2006


Page: 1 2 3

Related biology news :

1. Female guppies risk their lives to avoid too much male attention
2. New use for a cell toxin found to inhibit survival proteins in cancer cells
3. Glimmer of hope for Tahitian tree snails survival
4. Nexavar significantly extends overall survival by 44 percent in liver cancer patients
5. For many insects, winter survival is in the genes
6. HIV survival improves if patients stay in care
7. Preterm infants with RDS -- surfactant replacement therapies improves neonatal survival
8. Pancreatic cancer markers identified, may predict survival
9. Salk scientists hammer out a pathway that promotes muscle cell survival in mice
10. Knocking out survival protein could aid leukemia treatment
11. Cetuximab and irinotecan combination increases survival in metastatic colorectal cancer

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/11/2017)... Research and Markets has announced the addition of the "Global ... ... at a CAGR of 30.37% during the period 2017-2021. ... based on an in-depth market analysis with inputs from industry experts. ... the coming years. The report also includes a discussion of the ...
(Date:4/6/2017)... Forecasts by Product Type (EAC), ... End-Use (Transportation & Logistics, Government & Public Sector, Utilities ... Generation Facility, Nuclear Power), Industrial, Retail, Business Organisation (BFSI), ... you looking for a definitive report on the $27.9bn ... ...
(Date:4/5/2017)... , April 4, 2017 KEY FINDINGS ... to expand at a CAGR of 25.76% during the ... is the primary factor for the growth of the ... https://www.reportbuyer.com/product/4807905/ MARKET INSIGHTS The global stem ... technology, application, and geography. The stem cell market of ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... LINDA, CA (PRWEB) , ... October 11, 2017 ... ... to upregulate any gene in its endogenous context, enabling overexpression experiments and avoiding ... (CRISPRa) system with small RNA guides is transformative for performing systematic gain-of-function studies. ...
(Date:10/11/2017)... HILLS, Calif. , Oct. 11, 2017  SkylineDx today ... (ICR) and University of Leeds ... risk-stratify patients with multiple myeloma (MM), in a multi-centric Phase ... University of Leeds is the sponsor ... and ICR will perform the testing services to include high-risk ...
(Date:10/10/2017)... Angeles, CA (PRWEB) , ... ... ... Inc., a development-stage cancer-focused pharmaceutical company advancing targeted antibody-drug conjugate (ADC) therapeutics, ... uses of targeted HPLN (Hybrid Polymerized Liposomal Nanoparticle), a technology developed in ...
(Date:10/10/2017)... ... October 10, 2017 , ... USDM Life Sciences , ... life sciences and healthcare industries, announces a presentation by Subbu Viswanathan and Jennifer ... “Automating GxP Validation for Agile Cloud Platforms,” will present a revolutionary approach to ...
Breaking Biology Technology:
Cached News: