Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Unraveling the Chinese cabbage genome

23.01.2012
The draft genome of the Chinese cabbage could underpin genetic improvement of brassica vegetable and oil crops

Clues into the evolutionary diversification of brassicas have emerged from the draft Chinese cabbage genome sequence1. Brassica crops include many agriculturally important vegetables, such as Chinese cabbage, pak choi, turnip, broccoli, cabbage and cauliflower, as well as various oilseed crops.

The sequencing focused on Chinese cabbage, Brassica rapa subspecies pekinensis, and was undertaken by the international Brassica rapa Genome Sequencing Project Consortium. The work was underpinned by the previously published genome sequence of the premier model of flowering plants, Arabidopsis thaliana. This species is related to B. rapa, with which it shared a common ancestor.

“Brassicas come in many shapes and sizes, and even individual species show considerable morphological variation. Genome information helps us understand the genetic basis of this diversity,” explains consortium member Hiroshi Abe of Japan’s RIKEN BioResource Center, one of the three biggest Arabidopsis stock centers in the world. “We developed genomic resources for Brassica rapa and contributed to the gene annotation in this project.”

New plant species generally arise through hybridization, involving whole genome duplications, followed by rapid DNA sequence divergence under natural selection, chromosomal rearrangements and extensive gene loss. Indeed, plant biologists have observed whole-genome duplication in all plant genomes sequenced to date, including that of A. thaliana. In addition, previous physical mapping studies revealed a whole genome triplication event in the Brassica lineage, after its divergence from the Arabidopsis lineage at least 13–17 million years ago.

The genome sequence assembled by the Consortium covers more than 98% of the DNA encoding genes. By analyzing the sequence in detail, the researchers were able to investigate the evolutionary and functional consequences of the whole genome triplication event.
The researchers identified 41,174 protein-encoding genes belonging to 16,917 separate gene families. By comparing the sequences of Brassica genes to those of A. thaliana, they were able to relate gene structures in these two plants. They found that the extent of gene loss among triplicated genome segments varies, with one of the three copies consistently retaining a disproportionately large fraction of ancestral genes. Based on their finding, the researchers believe that variation in the number of members of gene families present in the genome probably contributes to the remarkable morphological plasticity of Brassica species.

“We hope that our findings will contribute to the breeding of improved Brassica oil and vegetable crops,” says Abe. “The genomic resources for Brassica rapa developed at the RIKEN BioResource Center will soon be made available to the wider research community.”

The corresponding author for this highlight is based at the Experimental Plant Division, RIKEN BioResource Center

gro-pr | Research asia research news
Further information:
http://www.riken.jp
http://www.researchsea.com

More articles from Life Sciences:

nachricht Ion treatments for cardiac arrhythmia — Non-invasive alternative to catheter-based surgery
20.01.2017 | GSI Helmholtzzentrum für Schwerionenforschung GmbH

nachricht Seeking structure with metagenome sequences
20.01.2017 | DOE/Joint Genome Institute

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Traffic jam in empty space

New success for Konstanz physicists in studying the quantum vacuum

An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Sustainable Water use in Agriculture in Eastern Europe and Central Asia

19.01.2017 | Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

 
Latest News

Helmholtz International Fellow Award for Sarah Amalia Teichmann

20.01.2017 | Awards Funding

An innovative high-performance material: biofibers made from green lacewing silk

20.01.2017 | Materials Sciences

Ion treatments for cardiac arrhythmia — Non-invasive alternative to catheter-based surgery

20.01.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>