Navigation Links
Genetic conflict in fish led to evolution of new sex chromosomes
Date:10/1/2009

s been leading research to identify the genetic basis for phenotypic differences in cichlids for the past 20 years, and who made the first crosses to map the gene responsible for this color pattern in 1993.

Depending on the surrounding natural background, this color pattern can help disguise female fish and help them avoid predation. However males who express this phenotype lack the species-specific color patterns used by females to select their mates. "This phenotype creates a sexual conflict because the allele is favored in females but not favored in males," explains Dr. Roberts, who fine mapped the gene. "In 'survival of the fittest,' the genes underlying a beneficial trait will increase in frequency, but this is an odd case where the trait is really good for females but really bad for males."

Using genomic techniques, Roberts identified the gene (pax7) that is responsible for this difference in color pattern. He found that the orange blotch (OB) allele that produces the variable pigmentation in females was dominant over the "brown barred" (BB) allele (that produces the more common brown pigmentation) and that it was located very near a female sex determiner (W). The genetic conflict that started over color was resolved by a new mutation that took over the sex determining function, and ensured that nearly all orange blotch fish are female.

"This study marries two evolutionary mysteries: the incredible diversity of fish in the lakes of East Africa and the genetic basis of sex determination," says Sam Scheiner, program director in the National Science Foundation (NSF)'s Division of Environmental Biology, which funded the research. "This study shows how simple genetic changes can lead to enormous biological diversity."


'/>"/>

Contact: Kelly Blake
kellyb@umd.edu
301-405-8203
University of Maryland
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Does the desire to consume alcohol and tobacco come from our genetic makeup?
2. Diverse genetic abnormalities lead to NF-κB activation in multiple myeloma
3. Many parents at-risk for cancer disclose genetic test results to children
4. Genetics determine optimal drug dose of common anticoagulant
5. Claims of sex-related differences in genetic association studies often not properly validated
6. American College of Medical Genetics responds to new FDA labeling decision for warfarin
7. UNC study questions FDA genetic-screening guidelines for cancer drug
8. Genome study shines light on genetic link to height
9. Selexis Announces Advanced Approach to Maximize Power of Genetic Elements for Rapid Development of High Performance Cell Lines
10. Genes, Environment and Health Initiative invests in genetic studies, environmental monitoring
11. Rutgers Genetics receives $7.8 million for autism research
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Genetic conflict in fish led to evolution of new sex chromosomes
(Date:8/29/2014)... researcher from the University of Texas Medical Branch at Galveston ... monoclonal antibodies can completely protect monkeys against a lethal dose ... a time when the disease is severe. , Thomas Geisbert, ... Nature discussing advances in Ebola treatment research. The ... the most deadly of pathogens, with fatality rates of up ...
(Date:8/29/2014)... the type and number of connections in transcription factor ... robustness in a study published in PLOS Computational ... the assortativity signature contributes to a network,s resilience against ... the out-out assortativity of TFN models has a greater ... three types of assortativity," said Dov A. Pechenick, PhD, ...
(Date:8/29/2014)... is available in German . ... between organisms is considered the oldest form of communication. ... conspecifics, for example, the sexual attraction between males and ... and to coordinate reproductive behavior in males and females. ... of the Algarve in Faro, Portugal, and at the ...
Breaking Biology News(10 mins):Leading Ebola researcher at UTMB says there's an effective treatment for Ebola 2Assortativity signatures of transcription factor networks contribute to robustness 2Ready for mating at the right time 2Ready for mating at the right time 3
... animal compares males to choose a mate, she can't order ... to rely on external cues that may indicate genetic quality. ... the peacock's tail, as cues that females might use. , ... between male genetic quality and ornament quality can be maintained. ...
... progenitor cells differentiate into cartilage cells when one master ... College of Medicine researchers in a report that appears ... of Sciences. , Skeletons are made of bone and ... stem cell, said Dr. Brendan Lee, associate professor of ...
... into brain cells on a new three-dimensional scaffold of ... living body than any other cell culture system. , ... invention-which may one day replace the ubiquitous Petri dish ... PLoS ONE. Shuguang Zhang, associate director of MIT's Center ...
Cached Biology News:Female pronghorns choose mate based on substance as well as show 2Signaling for cartilage 2MIT creates 3-D scaffold for growing stem cells 2MIT creates 3-D scaffold for growing stem cells 3
(Date:8/29/2014)... According to a new market report published by ... was valued at USD 3,754.6 million in 2012 and is ... a CAGR of 5.9% from 2013 to 2019. , Nearly ... afflicted by bone and joint disorders, and this number is ... and will continue to increase the demand for orthobiologics. Other ...
(Date:8/29/2014)... August 29, 2014 Three Lawrence ... 2014 Hydrogen Production R&D Award for ... splitting water using sunlight. , Shared with collaborators ... the University of Nevada, Las Vegas (UNLV), the ... models of photoelectrochemical solar-hydrogen production and corrosion processes. ...
(Date:8/28/2014)... August 28, 2014 SPIE Fellow Glenn ... and Optical Science and Director of the Center for ... Carolina at Charlotte, and co-founder and Chairman of the ... as the 2015 Vice President of SPIE, the international ... Philip Stahl announced recent election results at the Annual ...
(Date:8/28/2014)... research platform uses a laser to measure ... stress and heating, an approach likely to ... and batteries., This new technique, called nanomechanical ... and the surface stress of microscale structures ... the merits of surface-stress influence on mechanical ...
Breaking Biology Technology:Global Orthobiologics Market to Reach $5,519.9 Million by 2019: Transparency Market Research 2Global Orthobiologics Market to Reach $5,519.9 Million by 2019: Transparency Market Research 3Livermore Team Awarded for Hydrogen Production Research 2Glenn Boreman, UNC Professor and Plasmonics Co-Founder, Elected to SPIE Presidential Chain 2New analytical technology reveals 'nanomechanical' surface traits 2New analytical technology reveals 'nanomechanical' surface traits 3
... 10 Cambridge Research &,Instrumentation, Inc. (CRi) announces ... that converts any brightfield or,fluorescent microscope into a ... larger specimens, such as embryos,zebrafish, plants, tissue culture ... onto a fluorescent macroscope. The Nuance 2 system ...
... Faster, Easier,Quantification of Protein Biomarkers in Translational Medicine and Adaptive ... ... WALTHAM, Mass., Dec. 10 Decision Biomarkers Inc (DBI),a leading ... today announced the company,s,PATH(R) technology has been awarded United States ...
... International,(Nasdaq: PRXL ) has appointed Charles A. ... Policy and Strategic Reimbursement Services, a,unit based in ... team of,experts dedicated to helping PAREXEL,s clients provide ... and therapies they require. His,responsibilities include managing reimbursement ...
Cached Biology Technology:CRi Announces Nuance 2, the Next-Generation Multispectral Imaging System for Brightfield and Fluorescent-Based Microscopy 2Decision Biomarkers Awarded U.S. Patent for Protein Array Surface Chemistry 2PAREXEL Appoints Charles A. Stevens as Vice President/General Manager of Health Policy and Strategic Reimbursement and Strengthens Capabilities 2PAREXEL Appoints Charles A. Stevens as Vice President/General Manager of Health Policy and Strategic Reimbursement and Strengthens Capabilities 3PAREXEL Appoints Charles A. Stevens as Vice President/General Manager of Health Policy and Strategic Reimbursement and Strengthens Capabilities 4PAREXEL Appoints Charles A. Stevens as Vice President/General Manager of Health Policy and Strategic Reimbursement and Strengthens Capabilities 5
Request Info...
Loading Buffer...
Makes gels easy to load and track during electrophoresis. 10X concentrate of Bromophenol Blue, Xylene Cyanol, glycerol solution in TE...
Epi-Grids™ Colony Grid Templates are easy-to-use griding templates that allow rapid organization of colonies from initial screening plates and for preparing precise master plates....
Biology Products: