Tracking gene flow in marine plant evolution
A new method that could give a deeper insight into evolutionary biology by tracing directionality in gene migration has just appeared in EPJ Data Science. Paolo Masucci from the Centre for Advanced Spatial Analysis, at University College of London, UK, and colleagues identified the segregation of genes that a marine plant underwent during its evolution. They found that the exchange of genes, or gene flow, between populations of a marine plant went westward from the Mediterranean to the Atlantic. This methodology could also be used to estimate the information flow in complex networks, including other biological or social networks. The authors focused on a plant called Cymodocea nodosa, found in a marine area ranging from the East Mediterranean to the Iberian-African Atlantic coast. They relied on molecular markers to retrace the plant's gene flow, among distinct plant populations that are distant geographically. The idea was to infer the evolutionary pathways from datasets obtained by sequencing the plant, made of portions of non-coding DNA, called microsatellites.
Previous population genetics methods did not allow us to infer the direction of migration with such molecular data. Their statistical analyses require complex computing power, limiting the ability to explore simple evolutionary scenarios.
The authors restricted their analysis of a microsatellite genetic-markers dataset to those found in restricted island areas, among samples collected from the Mediterranean to the Atlantic. The team then inferred the past history of the gene flow based on the geographical distribution of genetic variations.
Masucci and colleagues found that gene flow most likely occurred westward from the Mediterranean to the Atlantic. Dominant Mediterranean genetic variations penetrate into the nearest Atlantic sites, but the opposite is not true. Natural evidence and an independent cross analysis confirmed these findings.
Latest Science NewsletterGet the latest and most popular science news articles of the week in your Inbox! It's free!
Learn more about
Check out our next project, Biology.Net
From other science news sites
Popular science news articles
- Study shows how chimpanzees share skills
- Alcohol makes smiles more 'contagious,' but only for men
- Gene doubling shapes the world: Instant speciation, biodiversity, and the root of our existence
- NASA's Swift mission observes mega flares from a mini star
- Laser-guided sea monkeys show how zooplankton migrations may affect global ocean currents
- Preference for built-up habitats could explain rapid spread of the tree bumblebee in UK
- Clear skies on exo-Neptune
- Earth's water is older than the sun
- Tooth buried in bone shows prehistoric predators tangled across land, sea
- Talk therapy -- not medication -- best for social anxiety disorder, large study finds
- Ancient mammal relatives were active at night 100 million years before origin of mammals
- Rosetta-Alice spectrograph obtains first far ultraviolet spectra of a cometary surface
- Giant garbage patches help redefine ocean boundaries
- Newly identified galactic supercluster is home to the Milky Way
- How much gravity is enough?