小麦基因组图谱绘制完成
文章来源:未知 文章作者:enread 发布时间:2018-08-17 08:50 字体: [ ]  进入论坛
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An international team has produced the most comprehensive genome map of wheat.
 
一个国际研究小组公布了最全面的小麦基因组。
 
The study published on Thursday in the journal Science presented the reference genome of the bread wheat variety "Chinese Spring," including its 21 chromosomes1, precise locations of 107,891 genes2, more than 4 million molecular3 markers and sequence information between genes.
 
The wheat has a large, complex genome with 16 billion base pairs or the building blocks of DNA4, more than five times larger than the human genome.
 
Sequencing the bread wheat genome is challenging also due to its complexity5, comprising three sub-genomes and more than 85 percent repeated elements in its genome, according to the study.
 
The repetitive elements means that vast parts of the genome are very similar to each other, making it difficult to distinguish each sub-genome and to put together the genome into its correct order.
 
More than 200 scientists in 20 countries collaborated6 to work out the results in 13 years, according to the International Wheat Genome Sequencing Consortium (IWGSC).
 
"This will greatly speed up our efforts on identification of agriculturally important wheat genes, including those that would help to combat major fungal diseases," said Kostya Kanyuka with the IWGSC.
 
"Completing this work means we can identify genes controlling traits of interest more rapidly," said Cristobal Uauy, Project Leader in crop genetics at the John Innes Center, one of the 73 research institutes participating in the study.
 
"This will facilitate and make more effective the breeding for traits like drought or disease resistance," said Uauy. 


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1 chromosomes 11783d79c0016b60332bbf1856b3f77d     
n.染色体( chromosome的名词复数 )
参考例句:
  • Chromosomes also determine the sex of animals. 染色体也决定动物的性别。 来自《简明英汉词典》
  • Each of four chromosomes divide longitudinally. 四种染色体的每一种都沿着纵向分裂。 来自《现代汉英综合大词典》
2 genes 01914f8eac35d7e14afa065217edd8c0     
n.基因( gene的名词复数 )
参考例句:
  • You have good genes from your parents, so you should live a long time. 你从父母那儿获得优良的基因,所以能够活得很长。 来自《简明英汉词典》
  • Differences will help to reveal the functions of the genes. 它们间的差异将会帮助我们揭开基因多种功能。 来自英汉非文学 - 生命科学 - 生物技术的世纪
3 molecular mE9xh     
adj.分子的;克分子的
参考例句:
  • The research will provide direct insight into molecular mechanisms.这项研究将使人能够直接地了解分子的机理。
  • For the pressure to become zero, molecular bombardment must cease.当压强趋近于零时,分子的碰撞就停止了。
4 DNA 4u3z1l     
(缩)deoxyribonucleic acid 脱氧核糖核酸
参考例句:
  • DNA is stored in the nucleus of a cell.脱氧核糖核酸储存于细胞的细胞核里。
  • Gene mutations are alterations in the DNA code.基因突变是指DNA密码的改变。
5 complexity KO9z3     
n.复杂(性),复杂的事物
参考例句:
  • Only now did he understand the full complexity of the problem.直到现在他才明白这一问题的全部复杂性。
  • The complexity of the road map puzzled me.错综复杂的公路图把我搞糊涂了。
6 collaborated c49a4f9c170cb7c268fccb474f5f0d4f     
合作( collaborate的过去式和过去分词 ); 勾结叛国
参考例句:
  • We have collaborated on many projects over the years. 这些年来我们合作搞了许多项目。
  • We have collaborated closely with the university on this project. 我们与大学在这个专案上紧密合作。
TAG标签: genome genes wheat
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