Latest News:  
Beijing   Dust    21 / 12 ℃  City Forecast

Home>>Life & Culture

Chinese scientists sequence sweet orange genome

By Wang Ru and Zhou Lihua (China Daily)

07:58, April 24, 2012

A farmer harvests oranges in Pingyuan county, Guangdong province. Zhong Xiaofeng / For China Daily

Chinese scientists have sequenced the genome of the sweet orange (Citrus sinensis), the first time a Chinese research team has independently determined the genome sequence of a fruit.

The achievement opens the door to better quality and higher crop yields, and provides a scientific basis for developing modified genetic breeds that do not have fatal viruses.

The Chinese research team, led by professor Deng Xiuxin, a member of the Chinese Academy of Engineering, and professor Ruan Yijun from Huazhong Agricultural University - along with horticultural, gene and bioinformatic scientists - assembled and annotated the sweet orange genome for a high quality genome.

Citrus fruits are among the most important and widely grown fruit crops in the world, with global production and total area ranking first among all fruit crops. Sweet oranges account for about 60 percent of citrus production, both as a fresh fruit and processed juice.

Citrus is susceptible to a large number of biotic diseases, especially citrus yellow mosaic, which is transmitted by the Asian citrus psyllid, a sap-sucking bug also found in the Middle East and America.

It has not been a good year for sweet orange farmers in Guangdong province, where the citrus yellow mosaic virus has infected many trees.

Currently, there is no effective way of dealing with the virus and the only way to stop the virus spreading is to root out the trees and burn them. Worse, the infected land cannot be used for sweet orange production for years afterward.

It is reported that more than 20 percent of sweet orange trees were infected this year in Guangdong, one of the country's major citrus growing areas.

Deng compares sequencing the genome of the sweet orange to opening the fruit crop's "black box", an achievement that could improve the fruit's color, taste, yield and disease resistance.

【1】 【2】


Leave your comment0 comments

  1. Name


Selections for you

  1. Artists perform Kun Opera at UNESCO headquarters

  2. Tulip festival in Morges, Switzerland

  3. Chinese research vessel starts 26th oceanic expedition

  4. China Int'l Cartoon & Animation Festival in Hangzhou

Most Popular


  1. Relations reach new heights
  2. China opposes Philippine school in S. China Sea
  3. Top adviser's visit promotes friendship, cooperation
  4. Where does the world go from here?
  5. Panicky responses to shootings harm students
  6. ChiNext delisting policies ramp up risk for investors
  7. Motives behind Tokyo's claim to buy Diaoyu Islands
  8. Huangyan crisis hints long-term tensions
  9. Arab countries hold mixed feelings towards US
  10. Renminbi's global use growing

What's happening in China

Entering Jiaxi Nature Reserve in Hainan

  1. 2nd Beijing International Film Festival
  2. Chinese migrant workers' wages up 21.2%
  3. Railways ready for upcoming Labor Day holiday
  4. Chinese cities rank in top 20 retail hubs
  5. Pop culture T-shirts under fire

PD Online Data

  1. Spring Festival
  2. Chinese ethnic odyssey
  3. Yangge in Shaanxi
  4. Gaoqiao in Northern China
  5. The drum dance in Ansai