Navigation Links
Whole genome sequencing of wild rice reveals the mechanisms underlying oryza genome evolution
Date:3/13/2013

March 13, 2013, Shenzhen, China - In a collaborative study published online today in Nature Communications, researchers from Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, BGI-Shenzhen, and University of Arizona have completed the genome sequencing of wild rice Oryza brachyantha. This work provides new insights for researchers to understand the function and evolution of Oryza genomes.

The genus Oryza is an idea model system for studying plant comparative genomics, evolutionary biology and functional biology. There are two cultivated rice and more than twenty wild rice species. Among them, the wild relatives can provide invaluable genomic resources for rice improvement. As the most diverged wild relative of O. sativa (rice), O. Brachyantha has resistance against many rice pathogens and various stress environments. It was also proved to have the most compact genome in the genus Oryza, suggesting the genome may not experience many changes after the divergence of Oryza species.

In this study, researchers generated a high-quality reference genome sequence of O. brachyantha (~261Mb), and 96% genome sequences are anchored on 12 chromosomes based upon BAC-based physical map. After the comprehensive analysis, they found that the compact genome of O. brachyantha was caused by the silencing of LTR (Long terminal Repeats) retrotransposons and massive internal deletions of ancient elements.

Compared with the rice genome, the team found that many gene families were expanded in rice, where tandem duplications and gene movements mediated by double-strand break repair are responsible for the amplification of these genes. Researchers also observed that segmental and tandem duplications, further expanded by transposable element insertions, contributed to transition from euchromatin to heterochromatin in the rice genome, reflecting the dynamic nature of the Oryza genomes.

Quanfei Huang, Project Manager from BGI, said "This work revealed many important genomic mechanisms underlying Oryza genome, such as the genome size variation, gene movement and transition of euchromatin to heterochromatin. In the near future, I believe there will be more genomes of Oryza species to be cracked, enabling the genus Oryza be an unparalleled system for functional and evolutionary studies in plants."


'/>"/>
Contact: Jia Liu
liujia@genomics.cn
BGI Shenzhen
Source:Eurekalert

Related biology news :

1. Cod has a key role in the whole Baltic Sea
2. Prenatal whole genome sequencing: Just because we can, should we?
3. BGI Tech develops whole exome sequencing analysis of FFPE DNA samples to boost biomedicine
4. New whole plant therapy shows promise as an effective and economical treatment for malaria
5. Making whole wheat bread taste and smell more appetizing
6. Foods identified as whole grain not always healthy
7. Leading evolutionary scientist to discuss how genome of bacteria has evolved
8. Darwin in the genome
9. Analysis of stickleback genome sequence catches evolution in action
10. Athletic frogs have faster-changing genomes
11. PNAS: Precise molecular surgery in the plant genome
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/1/2016)... , June 1, 2016 Favorable ... Election Administration and Criminal Identification to Boost Global Biometrics ... recently released TechSci Research report, " Global Biometrics Market ... Competition Forecast and Opportunities, 2011 - 2021", the global ... by 2021, on account of growing security concerns across ...
(Date:5/16/2016)... 16, 2016   EyeLock LLC , a market ... opening of an IoT Center of Excellence in ... the development of embedded iris biometric applications. ... convenience and security with unmatched biometric accuracy, making it ... from DNA. EyeLock,s platform uses video technology to deliver ...
(Date:5/3/2016)... 2016  Neurotechnology, a provider of high-precision biometric ... Biometric Identification System (ABIS) , a complete system ... ABIS can process multiple complex biometric transactions with ... fingerprint, face or iris biometrics. It leverages the ... MegaMatcher Accelerator , which have been used ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... Prostate Cancer Foundation (PCF) is pleased to announce 24 new Young Investigator ... Members of the Class of 2016 were selected from a pool of 128 ... About the Class of 2016 PCF Young Investigators ... ... ...
(Date:6/23/2016)... , ... June 23, 2016 , ... STACS DNA Inc., ... Leader at the Arkansas State Crime Laboratory, has joined STACS DNA as a Field ... DNA team,” said Jocelyn Tremblay, President and COO of STACS DNA. “In further expanding ...
(Date:6/23/2016)... June 23, 2016 ... 2016;12(1):22-8 http://doi.org/10.17925/OHR.2016.12.01.22 Published recently ... peer-reviewed journal from touchONCOLOGY, Andrew D Zelenetz ... of cancer care is placing an increasing burden ... expensive biologic therapies. With the patents on many ...
(Date:6/23/2016)... ... June 23, 2016 , ... Velocity Products, a division of ... and optimized exclusively for Okuma CNC machining centers at The International Manufacturing Technology ... among several companies with expertise in toolholding, cutting tools, machining dynamics and distribution, ...
Breaking Biology Technology: