日韩精品久久一区二区三区_亚洲色图p_亚洲综合在线最大成人_国产中出在线观看_日韩免费_亚洲综合在线一区

English 中文網(wǎng) 漫畫網(wǎng) 愛(ài)新聞iNews 翻譯論壇
中國(guó)網(wǎng)站品牌欄目(頻道)
當(dāng)前位置: Language Tips> Audio & Video> 新聞播報(bào)> Special Speed News VOA慢速

Pretty flowers lead two scientists to a discovery

[ 2010-09-14 11:18]     字號(hào) [] [] []  
免費(fèi)訂閱30天China Daily雙語(yǔ)新聞手機(jī)報(bào):移動(dòng)用戶編輯短信CD至106580009009

This is the VOA Special English Agriculture Report.

Not all research begins with a plan. Some studies begin by accident. Meredith Schafer says that is what happened with her and Cynthia Sagers.

Cynthia Sagers is a biology professor at the University of Arkansas. Meredith Schafer is a graduate student.

They were traveling in the state of North Dakota on a project. They noticed pretty yellow flowers.

They recognized them as canola. Farmers grow canola for seeds to make cooking oil. Canola is also used for animal feed and biofuel.

But the canola plants they saw were not growing in farm fields. They were growing along the road.

The researchers decided to test the plants. They had brought along special testing papers for the project they were working on. They crushed some of the leaves in water and added the test strips.

The results showed that the weedy canola plants contained genetic changes. If a plant is genetically modified, that means its genes have been changed to produce desired qualities.

This summer, the researchers from Arkansas went back to North Dakota. This time they went on a road trip to find canola. They traveled more than 5,000 kilometers.

They stopped about every eight kilometers to count plants and take samples to test in their vehicle.

What they found, they say, was the first discovery in the United States of wild canola plants with modified genes.

Meredith Schafer presented the findings at a recent meeting of the Ecological Society of America.

The scientists found canola plants in almost half of the places they investigated. They tested a total of 288 plants. They found that 80 percent of those plants contained genes from genetically engineered canola.

Some crop plants are modified to resist damage from the chemicals that farmers spray to kill weeds. There are two proteins that can give canola the ability to resist two commonly used herbicides. One protein gives resistance against glyphosate. The other protein gives resistance against glufosinate.

Two of the plants growing in the wild showed resistance to both kinds of weed killers. Professor Sagers says canola varieties with these genetic qualities have not been released on the market. This suggests the result of wild populations reproducing on their own.

And that's the VOA Special English Agriculture Report, written by Jerilyn Watson. You can read and listen to all of our programs and get podcasts at voaspecialenglish.com. I'm Mario Ritter.

canola: oilseed rape of a variety developed in Canada and grown in North America. It yields a valuable culinary oil 一種菜籽油

glyphosate: 草甘膦

glufosinate: 草胺磷

Related stories:

Raising goats for their hair

Housing plan threatens seed bank in Russia

Phone call about fertilizer could be a big help to Philippine rice farmers

Got baboons in your crops? Offer them a snake sandwich

(來(lái)源:VOA 編輯:陳丹妮)

 
中國(guó)日?qǐng)?bào)網(wǎng)英語(yǔ)點(diǎn)津版權(quán)說(shuō)明:凡注明來(lái)源為“中國(guó)日?qǐng)?bào)網(wǎng)英語(yǔ)點(diǎn)津:XXX(署名)”的原創(chuàng)作品,除與中國(guó)日?qǐng)?bào)網(wǎng)簽署英語(yǔ)點(diǎn)津內(nèi)容授權(quán)協(xié)議的網(wǎng)站外,其他任何網(wǎng)站或單位未經(jīng)允許不得非法盜鏈、轉(zhuǎn)載和使用,違者必究。如需使用,請(qǐng)與010-84883631聯(lián)系;凡本網(wǎng)注明“來(lái)源:XXX(非英語(yǔ)點(diǎn)津)”的作品,均轉(zhuǎn)載自其它媒體,目的在于傳播更多信息,其他媒體如需轉(zhuǎn)載,請(qǐng)與稿件來(lái)源方聯(lián)系,如產(chǎn)生任何問(wèn)題與本網(wǎng)無(wú)關(guān);本網(wǎng)所發(fā)布的歌曲、電影片段,版權(quán)歸原作者所有,僅供學(xué)習(xí)與研究,如果侵權(quán),請(qǐng)?zhí)峁┌鏅?quán)證明,以便盡快刪除。
 

關(guān)注和訂閱

人氣排行

翻譯服務(wù)

中國(guó)日?qǐng)?bào)網(wǎng)翻譯工作室

我們提供:媒體、文化、財(cái)經(jīng)法律等專業(yè)領(lǐng)域的中英互譯服務(wù)
電話:010-84883468
郵件:[email protected]
 
 
主站蜘蛛池模板: 久久久久在线观看 | 波多野结衣在线网站 | 久久久久久黄 | 午夜影院a| 亚洲人人爱 | 亚洲日韩在线视频 | 久久久久在线 | 日韩欧美一区二区三区视频 | 一道本在线观看视频 | 欧美激情视频一区二区免费 | 91精品久久久久久久久久久 | 人人爱天天做夜夜爽 | 国产精品久久久久无毒 | 国产成人av电影 | 久草久热 | 激情久久av一区av二区av三区 | 日韩成人一区 | 日本精品久久久久久久久免费 | 国产视频三区 | 成人黄色免费在线观看 | 精品国产污污免费网站 | 欧美精品国产精品 | 亚洲区国产区 | 久久精品道一区二区三区 | 成人性大片免费观看网站 | 亚洲一区二区三区中文字幕 | 日韩一区免费在线观看 | 亚洲欧美偷拍自拍 | 久久国产这里只精品免费 | 亚洲天堂ww | 九九久久国产精品大片 | 国产无圣光高清一区二区 | 99欧美在线 | 另类小说综合 | av在线播放免费 | av一区二区在线观看 | 91成人| 国产精品99在线观看 | 色综合图 | 欧美一区二区三区四区夜夜大片 | 人人爽久久涩噜噜噜蜜桃 |