In the recent research, researchers have found out a common genetic variant that could be partly blamed for poor reading ability.

This genetic variant has already been associated with dyslexia, a learning difficulty, which affects the development of literacy and language skills.  

It is present in one in seven people. The recent study by the University of Oxford showed that the people carrying the key sequence performed badly in tests of their reading ability. But it had no impact on general intelligence.  

Earlier researches have shown that a gene called KIAA0319, which lies on chromosome six could be responsible for developing dyslexia. The present study highlighted a sequence of DNA - called a haplotype - which included part of the key gene.  

In the recent study, researchers studied the link between this haplotype and reading ability in children. Researchers analyzed the data collected from 6,000 children aged seven to nine-year. These children were part of a major long-term study known as the Avon Longitudinal Study of Parents and Children (ALSPAC). Analysis of data showed that the children with the KIAA0319 gene variant consistently obtained lower than average ratings.  

Dr Silvia Paracchini, the lead researcher said that on average, people carrying this common genetic variant tended to perform poorly on tests of reading ability. However, it's important to note that this is only true for reading ability and not for IQ, so it doesn't appear to be connected to cognitive impairment. 

Dr Paracchini added that the effect of the genetic variant seemed to be small - but was statistically signfiicant.  

Dr Paracchini said: "We need to carry out studies into the exact role that this gene plays in brain development and how this affects people's reading ability."