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tropical and subtropical maize germplasm
相关语句
  “tropical and subtropical maize germplasm”译为未确定词的双语例句
     Present situation and prospect of utilizing tropical and subtropical maize germplasm in breeding
     玉米热带、亚热带种质资源利用的现状及展望
短句来源
     Utilization of exotic tropical and subtropical maize germplasm
     热带、亚热带外来玉米种质的利用
短句来源
     Study Advances of Improved Tropical and Subtropical Maize Germplasm
     热带亚热带玉米种质的改良研究进展
短句来源
     The study showed that plant height of improved tropical and subtropical maize germplasm was reduced more than 40%,harvest index was raised from 30% to 50% by recurrent selection.
     研究结果表明 ,经过改良热带亚热带玉米种质的株高降低 40 %以上 ,收获指数从 30 %提高到 5 0 %左右。
短句来源
     The base of maize germplasm of our country is very narrow, while the genetic diversity of the tropical and subtropical maize germplasm is very great .
     针对我国玉米种质基础日渐狭窄的现实,而热带、亚热带种质资源具有丰富的遗传多样性,是拓宽我国玉米遗传基础的重要来源。
短句来源
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  相似匹配句对
     Tropical Timber Market
     国际热带木材市场
短句来源
     Tropical cooking film
     高温蒸煮膜
短句来源
     tropical and subtropical elements are outstanding.
     ③热带、亚热带成分突出。
短句来源
     (Tropical pastures and fodder crops)
     《热带草地与饲料作物》(第二版)
短句来源
     Tropical Wild Fruit Germplasm in Xishuangbanna
     西双版纳热带野生果树资源
短句来源
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Maize is the third most important crop in the world and China.The average of maize production area in China is 24 5 million ha;the average maize yield is 4 96 ton per ha China ranks the second in the world in terms of total maize area and production.The rate of maize yield growth has being declining due to narrow genetic background and limited new heterotic patterns since 1970s.The role of tropical and subtropical maize germplasm in maize improvement was discussed in this paper.It was concluded...

Maize is the third most important crop in the world and China.The average of maize production area in China is 24 5 million ha;the average maize yield is 4 96 ton per ha China ranks the second in the world in terms of total maize area and production.The rate of maize yield growth has being declining due to narrow genetic background and limited new heterotic patterns since 1970s.The role of tropical and subtropical maize germplasm in maize improvement was discussed in this paper.It was concluded that the Chinese maize germplasm background should be broaden by using the tropical and subtropical maize germplasm.The new heterotic patterns should be developed and new hybrids with super heterosis could be bred,the methods of using tropical and subtropical maize germplasm were pointed out in this paper.

我国近几年平均每年种植玉米 2 45 0万公顷 ,平均产量为每公顷 4 96吨 ,种植面积和总产量居世界第二位。但 70年代以来我国玉米增产率呈下降趋势 ,玉米生产一直处于徘徊状态 ,其主要原因是国内种质资源匮乏 ,缺乏新的杂种优势群和杂种优势模式。分析热带、亚热带外来玉米种质在我国玉米育种中的作用后 ,指出利用玉米起源中心的热带、亚热带种质可以拓宽温带种质的玉米遗传基础 ,构建新的杂种优势模式 ,产生出超强优势的杂交玉米新组合 ;提出了热带、亚热带外来玉米种质的利用途径及方法。

The study showed that plant height of improved tropical and subtropical maize germplasm was reduced more than 40%,harvest index was raised from 30% to 50% by recurrent selection.Most of the Mexican dent germplasm,Caribbena dent and flint germplasm resisted to maize rust.The Suwan_1,Pop.22 Pop.28 and Pop.31 resisted to maize downy mildew.TZSR(w) and TZSR(Y) population were germplasm resources resistant to maize streak virus.Sanata Rosa 8073,NB_6and NB_12 were elite germplasm...

The study showed that plant height of improved tropical and subtropical maize germplasm was reduced more than 40%,harvest index was raised from 30% to 50% by recurrent selection.Most of the Mexican dent germplasm,Caribbena dent and flint germplasm resisted to maize rust.The Suwan_1,Pop.22 Pop.28 and Pop.31 resisted to maize downy mildew.TZSR(w) and TZSR(Y) population were germplasm resources resistant to maize streak virus.Sanata Rosa 8073,NB_6and NB_12 were elite germplasm resistant to MRDV,Pop.390 and Cornell ECB resisted to maize borers and fall armyworms,Tuxpeno Sequia was a good drought_tolerant population,Composto Amplo,SA_4 and Sa_6 populations were excellent germplasm of aluminum tolerance.These outstanding maize germplasmes could be used to improve main maize germplasm of our country.so that raised superior performance resistant to diseases,insects,stress tolerance,and excavated optential grain yield.

研究结果表明 ,经过改良热带亚热带玉米种质的株高降低 40 %以上 ,收获指数从 30 %提高到 5 0 %左右。大多数墨西哥马齿型、加勒比马齿型和硬粒型是锈病的抗源 ;群体 2 2、2 8和 31是霜霉病的抗源 ;TZSR(W )和TZSR(Y)群体是条纹病的抗源 ;SanataRosa 80 73、NB_6和NB_1 2群体是粗缩病的抗源 ;群体 5 90、390和CornellECB群体是玉米螟的抗源 ;TuxpenoSequia抗旱性突出 ;CompostoAmplo、SA_4和SA_6具有耐贫瘠及铝毒的优良特性。这些特异性种质可用于扩增、改良我国玉米的种质基础 ,提高抗病虫能力和抗逆性能 ,挖掘产量潜力

>=High oil com is a new type of corn with high added value which were made by human beings in 20th century .The study on high oil com began in 1896.During more than one hundred years, com breeders around the world have studied accumulation of com oil, inheritance of com oil content, relationship between com oil content and kernels yield and other characters, improvement and innovation of high oil maize germplasm, classification of heterotic groups and establishment of heterotic pattern on high oil corn germplasm,...

>=High oil com is a new type of corn with high added value which were made by human beings in 20th century .The study on high oil com began in 1896.During more than one hundred years, com breeders around the world have studied accumulation of com oil, inheritance of com oil content, relationship between com oil content and kernels yield and other characters, improvement and innovation of high oil maize germplasm, classification of heterotic groups and establishment of heterotic pattern on high oil corn germplasm, breeding for com varieties with high oil content and production of high oil com and so on. Great achievement of high oil corn has been achieved. However, the progress of high oil com is slow at present. There are three main causes are responsible for that. First, the germplasm resources of high oil corn are limitted. Second, nowadays the germplasm of high oil com used in breeding mostly were temperate material. Third, the production of high oil com is still slow. Because tropical and subtropical maize germplasm contains ample genetic diversity, introduction, improvement and utilization of tropical and subtropical maize germplasm is efficient method to widen genetic base of temperate maize germplasm of high oil com. These methods will assist in development of high oil

高油玉米是20世纪人工创造的一种高附加值玉米新类型。高油玉米的研究始于1896年,在过去的100 多年里,世界各国的玉米育种学家先后从高油玉米油分的积累、含油量的遗传、油分含量与籽粒产量和植株其他性状的关系,高油玉米种质的改良、创新及杂种优势类群划分与杂优模式,高油玉米品种选育和高油玉米生产等方面对高油玉米开展了大量的研究,并取得了可喜的成就。但是,目前高油玉米的发展比较缓慢,究其原因有3点:一是高油玉米种质资源狭窄;二是目前所利用的高油玉米种质多为温带材料;三是高油玉米的专业化生产水平比较低。由于热带亚热带玉米种质中蕴藏着丰富的遗传多样性,所以引进、改良和利用热带亚热带玉米种质是拓宽温带高油玉米种质遗传基础的有效途径。这些措施都为高油玉米的发展扫清障碍。

 
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