Navigation Links
Whole genome fine map of rice completed

After the completion of a draft sequence of the Chinese hybrid rice genome, which was published in the Journal Science in 2002, CAS researchers have recently finished the fine map of the rice genome. In an article published by the recent issue of PLoS Biology (Vol.3 Issue 2, 2005), scientists led by the Beijing Institute of Genomics (BIG) reported a "much improved, near-complete genome analysis of the indica and japonica subspecies of O. sativa."

The fine maps of the rice genome sequences will lay a solid foundation for studying the differences among strains of rice and shed insight into mechanisms of hybrid advantages at a new level, according to BIG researchers.

The efficiency and data quality of the fine maps of two strains of rice, Indica and Japonica, are better than the draft sequence published in 2002. The fine maps were assembled with whole genome shortgun approach. Through searches of 19079 full length cDNA, 97.7% of complete genes were found in the two genomes. After adjusting for residual errors of predictions with EST data, the number of genes is estimated to be between 30,000 to 40,000. Among them, only 2-3% genes are unique to any one of the two strains.

Even though the genetic difference between the two strains is small, there are large differences in intergenic regions. The study also analyzed the duplication history of the rice genome. Eighteen pairs of apparent duplications were discovered, covering 65.7% of the genome. Among them, 17 pairs happened before the divergence of the grasses from other flowering plants. More importantly, the on-going duplications of single genes provided a unlimited source of raw materials for gene genesis, creating differences among the grass family.

The Chinese Superhybrid Rice Genome Project, initiated by BGI in 2000, focused on the hybrid rice "Liang You Pei Jiu" as the basic research object. The hybrid was developed by the famous rice expert Yuan Longping. The goal of the project was t o reveal the molecular mechanism of the hybridization advantages, thus providing the theoretical basis for improving output and selecting better strains of agriculture crops. The current publication provided a completed fine map for the paternal strain¡°93-11¡± (Indica), and its comparison with the genome sequence of the Japonica.

It is reported that BGI will finish whole genome assembly and analysis for the maternal strain "PeiAi 64" (its main genetic background being Japonica, as well as a mixture of Indica and Japonica genes ). This would further help discovering distribution of the hybrid genes in F1 and the changes of physiological traits, thus revealing the source of the hybridization advantage in hybrid rice.


'"/>

Source:


Related biology news :

1. Whole-body MRI Takes Less Than 20 Min To Scan A Patients Entire Body For Cancer Spread To Bone
2. Whole genome promoter mapping - Human Genome Project v2.0?
3. First Whole Genome Map of Genetic Variability in Parkinson’s Disease
4. Whole-genome study at Johns Hopkins reveals a new gene associated with abnormal heart rhythm
5. Man and mouse share genome structures
6. Study finds more than one-third of human genome regulated by RNA
7. A bacterial genome reveals new targets to combat infectious disease
8. Scientists decipher genome of fungus that can cause life-threatening infections
9. Highly adaptable genome in gut bacterium key to intestinal health
10. Fleshing out the genome
11. Agilent Technologies new genome analysis technology set to accelerate Australia fight against mesothelioma
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:1/15/2016)... , Jan. 15, 2016 Recent publicized breaches ... to find new ways to ensure data security and ... iOS and Android that ties a ... transforming it into a hardware authorization token. Customer service ... their fingerprint on their KodeKey enabled device to verify ...
(Date:1/13/2016)... 13, 2016 ... of the  "India Biometrics Authentication & ... (2015-2020)"  report to their offering.  ... announced the addition of the  "India ... Estimation & Forecast (2015-2020)"  report ...
(Date:1/11/2016)... , Jan. 11, 2016  higi, the ... nearly 10,000 retail locations, web and mobile, today ... $40 million from existing investors. ... be devoted to further innovate higi,s health platform ... and web portal – including expanding services and ...
Breaking Biology News(10 mins):
(Date:2/3/2016)... ... February 03, 2016 , ... ... series of potential targets (epitopes) specific to misfolded, propagating strains of Amyloid beta ... specific monoclonal antibody therapeutics for Alzheimer’s. , Following on from the first misfolded ...
(Date:2/3/2016)... ... February 03, 2016 , ... Resilinc ... summarizes and analyzes nearly 750 unique supply chain notifications and alerts generated by ... , Supply chain risk management practitioners subscribe to the EventWatch service to receive ...
(Date:2/3/2016)... ALTO, Calif. , Feb. 3, 2016  Today, ... sale of AlphaImpactRx , a leading provider of ... health companies to IMS Health , a global ... AlphaImpactRx,s complementary offerings, capabilities and technologies will be integrated ... company,s growing global primary market research capabilities. ...
(Date:2/3/2016)... ... February 03, 2016 , ... ... two new solutions focused on social housing of small animal models in research ... in data.¹, ² , DSI’s HD-S11 implant has evolved to allow researchers to ...
Breaking Biology Technology: