基因变异导致岩鸽头冠的个性化
文章来源:未知 文章作者:enread 发布时间:2013-02-01 06:06 字体: [ ]  进入论坛
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University of Utah researchers decoded1 the genetic2 blueprint3 of the rock pigeon, unlocking secrets about pigeons' Middle East origins, feral(野生的,凶猛的) pigeons' kinship with escaped racing4 birds, and how mutations give pigeons traits like a fancy feather hairdo known as a head crest5. "Birds are a huge part of life on Earth, and we know surprisingly little about their genetics," especially compared with mammals and fish, says Michael D. Shapiro, one of the study's two principal authors and an assistant professor of biology at the University of Utah. "There are more than 10,000 species of birds, yet we know very little about what makes them so diverse genetically6 and developmentally."
 
He adds that in the new study, "we've shown a way forward to find the genetic basis of traits -- the molecular7 mechanisms8 controlling animal diversity in pigeons. Using this approach, we expect to be able to do this for other traits in pigeons, and it can be applied9 to other birds and many other animals as well."
 
The study appears Jan. 31 on Science Express, the website of the journal Science. Shapiro led the research with Jun Wang of China's BGI-Shenzhen (formerly Beijing Genomics Institute) and other scientists from BGI, the University of Utah, Denmark's University of Copenhagen and the University of Texas M.D. Anderson Cancer Center in Houston.
 
Key findings of the study of pigeons, which first were domesticated10(驯养) some 5,000 years ago in the Mediterranean11 region:
 
"The researchers sequenced the genome, or genetic blueprint, of the rock pigeon, Columba livia, among the most common and varied12 bird species on Earth. There are some 350 breeds with different sizes, shapes, colors, color patterns, beaks13, bone structure, vocalizations and arrangements of feathers on the feet and head -- including head crests14 that come in shapes known as hoods15(头套,风帽), manes(灵魂), shells and peaks.
 
"The pigeon is among the few bird genomes sequenced so far, along with those of the chicken, turkey, zebra finch16 and a common parakeet(长尾小鹦鹉) known as a budgerigar or budgie, so "this will give us new insights into bird evolution," Shapiro says.


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1 decoded ad05458423e19c1ff1f3c0237f8cfbed     
v.译(码),解(码)( decode的过去式和过去分词 );分析及译解电子信号
参考例句:
  • The control unit decoded the 18 bits. 控制器对这18位字进行了译码。 来自《简明英汉词典》
  • Scientists have decoded the dog genome. 科学家已经译解了狗的基因组。 来自辞典例句
2 genetic PgIxp     
adj.遗传的,遗传学的
参考例句:
  • It's very difficult to treat genetic diseases.遗传性疾病治疗起来很困难。
  • Each daughter cell can receive a full complement of the genetic information.每个子细胞可以收到遗传信息的一个完全补偿物。
3 blueprint 6Rky6     
n.蓝图,设计图,计划;vt.制成蓝图,计划
参考例句:
  • All the machine parts on a blueprint must answer each other.设计图上所有的机器部件都应互相配合。
  • The documents contain a blueprint for a nuclear device.文件内附有一张核装置的设计蓝图。
4 racing 1ksz3w     
n.竞赛,赛马;adj.竞赛用的,赛马用的
参考例句:
  • I was watching the racing on television last night.昨晚我在电视上看赛马。
  • The two racing drivers fenced for a chance to gain the lead.两个赛车手伺机竞相领先。
5 crest raqyA     
n.顶点;饰章;羽冠;vt.达到顶点;vi.形成浪尖
参考例句:
  • The rooster bristled his crest.公鸡竖起了鸡冠。
  • He reached the crest of the hill before dawn.他于黎明前到达山顶。
6 genetically Lgixo     
adv.遗传上
参考例句:
  • All the bees in the colony are genetically related. 同一群体的蜜蜂都有亲缘关系。
  • Genetically modified foods have already arrived on American dinner tables. 经基因改造加工过的食物已端上了美国人的餐桌。 来自英汉非文学 - 生命科学 - 基因与食物
7 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。
8 mechanisms d0db71d70348ef1c49f05f59097917b8     
n.机械( mechanism的名词复数 );机械装置;[生物学] 机制;机械作用
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。 来自《简明英汉词典》
  • He explained how the two mechanisms worked. 他解释这两台机械装置是如何工作的。 来自《简明英汉词典》
9 applied Tz2zXA     
adj.应用的;v.应用,适用
参考例句:
  • She plans to take a course in applied linguistics.她打算学习应用语言学课程。
  • This cream is best applied to the face at night.这种乳霜最好晚上擦脸用。
10 domesticated Lu2zBm     
adj.喜欢家庭生活的;(指动物)被驯养了的v.驯化( domesticate的过去式和过去分词 )
参考例句:
  • He is thoroughly domesticated and cooks a delicious chicken casserole. 他精于家务,烹制的砂锅炖小鸡非常可口。 来自《简明英汉词典》
  • The donkey is a domesticated form of the African wild ass. 驴是非洲野驴的一种已驯化的品种。 来自《简明英汉词典》
11 Mediterranean ezuzT     
adj.地中海的;地中海沿岸的
参考例句:
  • The houses are Mediterranean in character.这些房子都属地中海风格。
  • Gibraltar is the key to the Mediterranean.直布罗陀是地中海的要冲。
12 varied giIw9     
adj.多样的,多变化的
参考例句:
  • The forms of art are many and varied.艺术的形式是多种多样的。
  • The hotel has a varied programme of nightly entertainment.宾馆有各种晚间娱乐活动。
13 beaks 66bf69cd5b0e1dfb0c97c1245fc4fbab     
n.鸟嘴( beak的名词复数 );鹰钩嘴;尖鼻子;掌权者
参考例句:
  • Baby cockatoos will have black eyes and soft, almost flexible beaks. 雏鸟凤头鹦鹉黑色的眼睛是柔和的,嘴几乎是灵活的。 来自互联网
  • Squid beaks are often found in the stomachs of sperm whales. 经常能在抹香鲸的胃里发现鱿鱼的嘴。 来自互联网
14 crests 9ef5f38e01ed60489f228ef56d77c5c8     
v.到达山顶(或浪峰)( crest的第三人称单数 );到达洪峰,达到顶点
参考例句:
  • The surfers were riding in towards the beach on the crests of the waves. 冲浪者们顺着浪头冲向岸边。 来自《简明英汉词典》
  • The correspondent aroused, heard the crash of the toppled crests. 记者醒了,他听见了浪头倒塌下来的轰隆轰隆声。 来自辞典例句
15 hoods c7f425b95a130f8e5c065ebce960d6f5     
n.兜帽( hood的名词复数 );头巾;(汽车、童车等的)折合式车篷;汽车发动机罩v.兜帽( hood的第三人称单数 );头巾;(汽车、童车等的)折合式车篷;汽车发动机罩
参考例句:
  • Michael looked at the four hoods sitting in the kitchen. 迈克尔瞅了瞅坐在厨房里的四条汉子。 来自教父部分
  • Eskimos wear hoods to keep their heads warm. 爱斯基摩人戴兜帽使头暖和。 来自辞典例句
16 finch TkRxS     
n.雀科鸣禽(如燕雀,金丝雀等)
参考例句:
  • This behaviour is commonly observed among several species of finch.这种行为常常可以在几种雀科鸣禽中看到。
  • In Australia,it is predominantly called the Gouldian Finch.在澳大利亚,它主要还是被称之为胡锦雀。
TAG标签: genetic Pigeon CREST
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