Rice genome approaches completion

A large group of scientists led by the Beijing Institute of Genomics has published in the freely-available online journal PLoS Biology a much improved, near-complete genome analysis of the indica and japonica subspecies of Oryza sativa, which are eaten in India and China, and Japan, respectively. The analysis team, led by Gane Ka-Shu Wong, provides important insights into the evolution of rice.

The key to the improvement in the genome sequence analysis is that the researchers have used the combined DNA sequence data from the two subspecies to facilitate the sequence assembly. The result is a nearly 1,000-fold increase in contiguity for the two genome sequences relative to the existing sequence data.

The researchers have used their improved genome sequence to investigate the evolutionary history of rice. Central to evolution is the development of new functions through mutation of existing genes. But when mutations occur in functional genes, the result is rarely beneficial, so it is thought that evolution is more likely to proceed first by duplicating existing genes and then experimenting on the "backup" copy of the gene.

Wong and colleagues report that there is evidence in the rice DNA sequences for a whole-genome duplication event just before the grasses diverged from other flowering plants, about 5570 million years ago. This genome duplication may have played a role in the origin of the grasses, which then spread rapidly across the world to provide important sources of food that, among other things, possibly influenced human evolution.

Analysis of the rice genomes also indicates that there is massive ongoing duplication of individual genes. These individual gene duplications provide a continuous source of raw material for gene genesis and very likely contribute to the differences between members of the grass family. Now the challenge is to use the rice sequences as a basis for detailed genetic analyse

Contact: Paul Ocampo
Public Library of Science

Page: 1 2

Related biology news :

1. Unravelling new complexity in the genome
2. One species, many genomes
3. First genome-wide study of infectious disease opens new avenues for HIV treatment, vaccines
4. Charting ever-changing genomes
5. Neutral evolution has helped shape our genome
6. Sea anemone genome provides new view of our multi-celled ancestors
7. Cloning the male genome may help infertile men
8. Mutating the entire genome
9. Exploring the dark matter of the genome
10. New findings challenge established views on human genome
11. ENCODE map changes view of the human genome landscape

Post Your Comments:
TAG: Rice genome approaches completion

(Date:10/8/2015)... , 8. Oktober 2015 ... global tätiges Unternehmen des Bereiches Tracking, hat ... mit der Gefängnisbehörde Virginias (Department of Corrections ... elektronische Überwachungsdienste für alle Strafen geliefert werden, ... Cassell , Präsident für den Amerikanischen Kontinent ...
(Date:10/7/2015)... --> --> ... during third quarter 2015 amounted to around 960 MSEK. This ... that was communicated 20 August 2015. --> ... and a continued growing demand for the company,s products, the ... higher than during the third quarter. The revenue guidance for ...
(Date:10/6/2015)... , Oct. 6, 2015 Track Group, ... today that it has signed a contract with the ... across the full range of sentences under the Department,s ... of the Americas. "This contract with the Virginia DOC ... the US and advances our position as a trusted ...
Breaking Biology News(10 mins):
(Date:10/7/2015)... --  PDI , a leader in infection prevention products ... challenges across various healthcare settings, as well as guidelines ... tool is part of a larger effort to raise ... and lower healthcare-associated infections. ... how to use the right product, in the right ...
(Date:10/7/2015)... RADNOR, Pa. , Oct. 7, 2015   ... global, independent provider of laboratory products, services and ... Technologies Inc. (PTI), a specialty solvent company that ... solvents. This acquisition will enhance VWR,s growing laboratory ... its laboratory and biopharmaceutical manufacturing customers. ...
(Date:10/7/2015)... Clara, CA (PRWEB) , ... October 07, 2015 ... ... microscopy (AFM) today announced a webinar titled Smart Nanostructured Coatings to provide a ... 15, 2015. Register for this free webinar at http://bit.do/smart-coatings . This webinar ...
(Date:10/7/2015)... ... October 07, 2015 , ... Optivia ... to develop a dynamic, multi-scale, physiologically based pharmacokinetic (dmPBPK) modeling platform for predicting ... combine their respective expertise in in vitro transporter assay technology and modeling methods ...
Breaking Biology Technology:
Cached News: