Navigation Links
The first genome sequence of Chinese plum provides important resource for fruit improvement

December 27, 2012, Shenzhen, China - A Chinese research team, led by Beijing Forestry University, BGI, Beijing Lin Fu Ke Yuan Flowers Co., Ltd, and other institutes, has completed the first genomic sequence of Prunus mume, known as mei. This work is extremely important for the deeper understanding of Rosaceae evolution and provides an invaluable resource for the improvement of fruit trees. The latest study was published online today in Nature Communication.

As one of the longest-lived flowering fruit trees, the P. mume was domesticated in China more than 3,000 years ago. It belongs to Rosaceae, the third most economically important plant family in temperate regions, and is characterized by high nutrition, medical value, and tolerance to low temperature in winter. Writers and artists have extolled the beauty of its flowers, and the blossom is considered to be the symbol of Chinese national spirit. The availability of P. mume genome will open a new way for better decoding the mysteries of this fascinating tree.

The plantation technique that makes P. mume so diverse--the artificial grafting--also makes their genomes difficult to assemble. In this study, researchers sequenced the genome of P. mume, a wild species from Tibet in China, using a robust approach integrated with next-generation sequencing (NGS) and whole-genome mapping (WGM) technologies. Then they constructed a high-density genetic map by applying restriction-site-associated DNA (RAD) marker strategy that further improves the quality of the genomic reference. Through all the efforts, researchers yielded the ~237Mb P. mume reference genome.

The poor phylogenetic resolution of the Rosaceae suggests rapid evolution within the family. In this study, the evolutionary analysis of P. mume genome demonstrated that there was no recent whole-genome duplication (WGD) event happened after the differentiation between P. mume and Malus x domestica (apple). However, the triplicated genomic arrangement was found in the P. mume genome by paleo-history analysis in Prunus.

Supported by the genomic data of apple and strawberry (Fragaria vesca), researchers successfully reconstructed nine ancestral chromosomes of Rosaceae family, and analyzed the chromosome fusion, fission and duplication history in three major subfamilies, including genera Prunus, Malus and Fragaria. Through analysis, they hypothesized that at least 11 fissions and 11 fusions occurred in P. mume from the nine common ancestral chromosomes. For apple, at least one WGD and five fusions took place to reach the 17-chromosome structure, compared with 15 fusions for strawberry to affect the 7-chromosome structure.

P. mume is one of the first trees that bloom in early spring, blooming even below 0℃. In this study, researchers investigated the genetic characteristics underlying the mechanisms related to acclimate to cold weather and release itself from dormancy. They found that dormancy-associated MADS-box transcription factors (DAM) family and C-repeat-binding transcription factors (CBF) were two important factors related with flowering dormancy.

As the saying goes, "Plum blossom incense from the cold weather", P. mume always has a special fragrance in winter. To understand its mechanism of floral scent, researchers identified a series genes related to the biosynthesis of volatile compounds, such as benzyl alcohol acetyltransferase (BEAT) gene. They supposed the expansion of the BEAT gene family might increase the content of benzyl acetate and therefore induces the special fragrance of P. mume.

The disease resistance related-genes may benefit the future breeding improvement. In this study, researchers found many related genes expanded tremendously in the P. mume genome, such as leucine-rich repeat receptor-like kinase (LRR-RLK) genes, the nucleotide-binding site-coding resistant gene (NBS-coding R gene), and pathogenesis-related (PR) gene families. It was reported that PR proteins could mediate plant defence against pathogenic constraints and the general adaptation to stressful environments. Most PR gene families in P. mume were expanded notably especially PR10, suggesting their expansion might be related to the response of P. mume to salt, drought and fungal infection in roots and leaves.

Wenbin Chen, Project Manager of BGI, said, "The P. mume genome lays a solid foundation for identification of important economic traits, and provides a valuable resource for P. mume breeding and other Rosaceae species studies. The work here also brings a new approach for further exploring the biosynthesis of floral scent and regulation mechanism of early blooming in endodormancy, and other comparative genomics studies on Rosaceae species."


Contact: Jia Liu
BGI Shenzhen

Related biology news :

1. OpGen announces sequence assembly and finishing of first reference genome of domestic goat
2. The first goat genome sets a good example for facilitating de novo assembly of large genomes
3. First freshwater mosasaur discovered
4. First evidence of fish sensing geomagnetic fields from a Czech Christmas market
5. Africas Homo sapiens were the first techies
6. Surgical Theater, LLC sells first Surgical Rehearsal Platform to UH Case Medical Center
7. First evidence of ocean acidification affecting live marine creatures in the Southern Ocean
8. Researchers decode birch tree genome sequence for the first time
9. State of Nuevo León first to benefit from improved nationwide air quality information system
10. Israels first Green Roofs Ecology research center dedicated at University of Haifa
11. Worlds rarest whale seen for the first time
Post Your Comments:
(Date:10/29/2015)... , Oct. 29, 2015  Connected health pioneer, ... driving the explosion of technology-enabled health and wellness, and ... new book, The Internet of Healthy Things ... sensors or smartphones even existed, Dr. Kvedar, vice president, ... of health care delivery, moving care from the hospital ...
(Date:10/27/2015)... Calif. , Oct. 27, 2015 Synaptics Inc. ... solutions, today announced that Google has adopted the Synaptics ... touch controller solutions to power its newest flagship smartphones, ... by Huawei. --> ... like Google to provide strategic collaboration in the joint ...
(Date:10/23/2015)... and GOLETA, California , October 23, ... BIOPAC and SensoMotoric Instruments (SMI) announce a mobile plug ... data captured during interactive real-world tasks SensoMotoric ... integration of their established wearable solutions for eye tracking ... gaze behavior captured with SMI Eye Tracking Glasses ...
Breaking Biology News(10 mins):
(Date:11/24/2015)... HILLS, N.J. (PRWEB) , ... November 24, 2015 , ... ... as the recipient of the 2016 USGA Green Section Award. Presented annually since 1961, ... golf through his or her work with turfgrass. , Clarke, of Iselin, ...
(Date:11/24/2015)... ... November 24, 2015 , ... Copper ... unless it is bound to proteins, copper is also toxic to cells. With ... Worcester Polytechnic Institute (WPI) will conduct a systematic study of copper in the ...
(Date:11/24/2015)... November 24, 2015 --> ... research report "Oligonucleotide Synthesis Market by Product & Services ... Synthesis, Diagnostic, DNA, RNAi), End-User (Research, Pharmaceutical & Biotech, ... MarketsandMarkets, the market is expected to reach USD 1,918.6 ... at a CAGR of 10.1% during the forecast period. ...
(Date:11/24/2015)... , November 24, 2015 ... recent market research report released by Transparency Market Research, ... expand at a CAGR of 17.5% during the period ... Testing Market - Global Industry Analysis, Size, Volume, Share, ... global non-invasive prenatal testing market to reach a valuation ...
Breaking Biology Technology: