Navigation Links
Analysis of flower genes reveals the fate of an ancient gene duplication

In a step that advances our ability to discern the ancient evolutionary relationships between different genes and their biological functions, researchers have provided insight into the present-day outcome of a single gene duplication that occurred over a hundred million years ago in an ancestor of modern plants. The work is reported in Current Biology by a team led by Brendan Davies of the University of Leeds, England.

Gene duplication--a relatively uncommon event in which a single copy of a gene is transformed into two separate copies--is thought to play a key role in the evolution of new gene functions. Duplications are important because they effectively allow at least one of the gene copies to evolve while the (likely important) function of the original gene can remain intact. In this way, the duplication of pre-existing genetic information provides the raw material from which new gene functions can evolve, thereby contributing to the evolution of genetic complexity and the evolution of sophisticated life forms.

Very many such gene-duplication events have shaped the evolution of today's living species, but tracing the evolution of a specific single gene over millions of years of evolution--and over potentially several gene-duplication events--can pose a significant challenge. One way in which this can be overcome is for researchers studying a particular modern-day gene to look at neighboring genes in different related species. Genes derived from a common ancestral gene region will still share similarities in neighboring gene sequences, both in terms of gene identity and the order such sequences appear within the chromosome. This kind of preserved gene order is known as genome synteny.

In the new work, researchers have used synteny to clarify the evolution of genes essential for the development of floral reproductive organs, stamens and carpels. The subjects of their work were two genes that appear to play identical functions in two differen t plant species: the AGAMOUS (AG) gene of the mustard plant Arabidopsis thaliana and the PLENA (PLE) gene of the snapdragon, Antirrhinum majus. Both genes are required for the development of flower reproductive structures, and when these genes are mutated, the plants form so-called double flowers, in which petals and sepals replace stamens and carpels. AG and PLE are very closely related genes, and they clearly have nearly identical function, suggesting that they are derived from the same single gene inherited from a common ancestor. However, analysis of synteny in the AG and PLE regions unambiguously showed that AG and PLE are not derived from the same ancestral gene, but that they instead represent two different products of a gene-duplication event that occurred around 125 million years ago in a common ancestor of Arabidopsis and Antirrhinum. The other genes created in that ancient gene-duplication event became altered, in different ways, so that they now have new functions in Arabidopsis and Antirrhinum.

These findings provide one of the first demonstrations of how an essential developmental function can be randomly assigned to either product of a gene-duplication event. The work defines a new standard for the evidence required to establish the evolutionary relationships of genes from different species.


'"/>

Source:Cell Press


Related biology news :

1. Ariadne Genomics Announces the Release of PathwayStudio?Central, Client-Server Software for Biological Pathway Analysis
2. Eliminate Data Analysis Bottlenecks in Drug Discovery
3. Analysis Of Human Genome To Predict The Development Of Illnesses
4. Genomatix Microarray Analysis Pipeline achieves Affymetrix GeneChip compatible?status
5. Analysis of breast-cancer gene role offers promising target
6. Analysis of rhesus monkey genome uncovers genetic differences with humans, chimps
7. The evolutionary triumph of flower power
8. Bumblebees copy one another when contending with unfamiliar flowers
9. Long-sought flower-inducing molecule found
10. Divergent mating systems and parental conflict as a barrier to hybridization in flowering plants
11. The evolution of food plants: Genetic control of grass flower architecture
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/22/2017)... , March 21, 2017   Neurotechnology , ... recognition technologies, today announced the release of the ... which provides improved facial recognition using up to ... a single computer. The new version uses deep ... accuracy, and it utilizes a Graphing Processing Unit ...
(Date:3/20/2017)... 20, 2017 PMD Healthcare announces the release ... Wellness Management System (WMS), a remote, real-time lung health ... PMD Healthcare is a Medical Device, Digital Health, and ... to creating innovative solutions that empower people to improve ... focus, PMD developed the first ever personal spirometer, Spiro ...
(Date:3/9/2017)... MOUNTAIN VIEW, Calif. , March 9, 2017 ... and 23andMe , the leading personal genetics company, ... Zipongo can now provide customers with personalized nutrition plans ... and biometrics, but also genetic markers impacting how their ... Zipongo,s personalized food decision support platform uses biometrics such ...
Breaking Biology News(10 mins):
(Date:4/21/2017)... ... April 21, 2017 , ... ... in 10 categories with over 30 nominees and well as the first-year award ... new award and the event was hosted by CompanyWeek and Manufacturers Edge, among ...
(Date:4/21/2017)... ... April 21, 2017 , ... ... Bank, today announced first round funding to three startups through the UConn Innovation ... support to new business startups affiliated with UConn. , The UConn Innovation Fund ...
(Date:4/21/2017)... ... ... The AMA is happy to announce that $48,000 in scholarships will be ... are created through funds donated by model aviation organizations and individuals, AMA members, and ... Scholarship Committee, which is made up of model aviation pilots and enthusiasts. The committee ...
(Date:4/21/2017)... ... April 21, 2017 , ... ... nourishing a range of emerging technology-based businesses, recently earned a $77,518 grant from ... , Founded in 2004, FITCI is Frederick’s first incubator. A non-profit corporation, ...
Breaking Biology Technology: