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改良进展
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  improvement advance
     Improvement Advance on Agronomic Traits of Maize Hybrids from Different Eras in North China
     华北地区不同年代玉米杂交种农艺性状的改良进展
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  “改良进展”译为未确定词的双语例句
     GENETIC IMPROVEMENT OF PLANT NUTRITIONAL CHARACTERS:ADVANCES AND PERSPECTIVES
     植物营养性状的遗传学改良:进展与期望
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     The genetic gains of above traits and their GCA played an important role in increasing yield potential of recent hybrids,and to the reduction of the cost of producing hybrid seeds.
     部分性状及其 GCA的遗传改良进展对提高近代玉米杂交种的产量潜力、降低种子生产成本都有重要作用。
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     Genetic Improvement on Resistance and Yield Components of Chinese Cottons with Fusarium and Verticillium Wilts Resistance
     中国棉花抗枯、黄萎病品种抗性和产量性状改良进展
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     Discussion on the growth rate of milk production, the effect of factors on the consumption of dairy products, the function of private rural dairy farm on the development of dairy industry, the extension service of scientific feeding technology and high-quality roughage production, the development of milk production by breeding system, for the development of dairy industry in china.
     该文从我国奶的增产速度、影响奶品消费水平的因素、我国农村奶牛饲养户对奶业发展的作用、科学饲养技术与优质青粗饲料生产的推广、加快对现有奶牛品种的改良进展等几个方面论述了我国奶产业的稳定持续发展。
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     The genetic improvement and variety evolution of cotton varieties in China since 1949 were comprehensively studied at three different aspects: phenotypic values, molecular markers and coefficient of parentage.
     从表型性状、分子标记和系谱共祖度三个方面全面论述了自建国以来我国棉花品种的遗传改良进展及品种演变。
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     MAKE PROGRESS
     进展
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     Progresses in cotton fiber improvement through gene engineering
     基因工程改良棉纤维研究进展
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     Advances in Research on Genetic lmprovementof Eucalyptus grandis
     巨桉遗传改良研究进展
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     The Advances in Machine Translation
     机器翻译进展
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     In breeding of polyploid of Brassica oleracea L.var.
     用改良L.
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Improved effects of full-sib recurrent selection and mass selection on combining ability of major economic traits in a maize population were studied, using an incomplete diallel design. The results indicated that the two selection methods are effective for improving combining ability of major economic traits of the maize population, and that effects of improvement on general combining ability are greater than on specific combining ability. Improved effects of full-sib recurrent selection are significantly superior...

Improved effects of full-sib recurrent selection and mass selection on combining ability of major economic traits in a maize population were studied, using an incomplete diallel design. The results indicated that the two selection methods are effective for improving combining ability of major economic traits of the maize population, and that effects of improvement on general combining ability are greater than on specific combining ability. Improved effects of full-sib recurrent selection are significantly superior to mass selection. The improvement of general combining ability of the basic population recombined for four times is greater than that for two times. Two preliminary conclusions were obtained: (1), the basic population should be fully recombined at the beginning of .improvement, and (2), a composite program of combining full-sib recurrent selection with half-sib recurrent selection, etc. should be used for a further improvement of the studied population.

本文研究了全同胞轮回选择和混合选择对玉米群体主要经济性状配合力的改良效果,结果表明:两稚选择方法对群体主要经济性状的配合力都有一定的改良效果,并以对一般配合力的改良效果较大;而且全同胞轮回选择的改良效果明显优于混合选择;经4次重组的基础群体,多数经济性状一般配合力的改良进展明显大于经2次重组的基础群体。

Characteristics of decade groups of maize (Zea mays. L) inbreds typical of those used in Chinese maize production in 1980s and 1970s were investigated, and general combining ability (GCA) of various traits was evaluated by 6×13 diallel cross. The results showed that grain yield, biomass, leaf area per plant and ideotype of recent maize inbreds were improved significantly; green period and majority of yield comopnent traits also performed better. At the same time, GCA's grain yield, biomass, leaaf area per plant,...

Characteristics of decade groups of maize (Zea mays. L) inbreds typical of those used in Chinese maize production in 1980s and 1970s were investigated, and general combining ability (GCA) of various traits was evaluated by 6×13 diallel cross. The results showed that grain yield, biomass, leaf area per plant and ideotype of recent maize inbreds were improved significantly; green period and majority of yield comopnent traits also performed better. At the same time, GCA's grain yield, biomass, leaaf area per plant, stem area in cross—section and stalk crushing strength were significantly improved; some GCA's yield component traits also increased, but that of trassel characters decreased. The genetic gains of above traits and their GCA's played the important roles in increasing the adaptability, stress resistance and yield potential of recent hybrids, and in reducing the production cost of hybrid seeds. We suggest that the further improvement of available maize inbreds should be emphasized on GCA's root and stalk quality, disease resistance and fertility on the basis of that of grain yield and nutritional quality; and pay attention to fertility, grain yield, disease resistance and root quality of inbred per se.

本文研究了我国70年代至80年代玉米生产上应用的主要自交系的性状表现,利用6×13不完全双列杂交模式分析了各性状的一般配合力(GCA)。结果表明,8D年代玉米自交系自身的籽粒产量、生物产量、单株叶面积和株型得到了显著改良;其余多数穗粒性状和叶片功能期也有一定的改良效果。与此同对,籽粒产量、生物产量、单株叶面积、茎粗和茎杆强度等性状的GCA显著提高;部分果穗性状GCA有所增加,但雄穗性状GCA降低。这些性状及其GCA的遗传改良进展,对增加现代玉米杂交种的适应性、抗逆性和产量潜力,降低种子生产成本都具有重要作用。分析认为,当前我国玉米自交系遗传改良首先在主攻产量和品质GCA的基础上,应重视根系与茎杆质量增强抗倒性、以及抗病性和结实性等性状的GCA。同时,还应注意自交系自身的结实性、产量、抗病性和根系质量的改良。

Several physiological mechanisms affecting water stress adaption in plants including rice, wheat, corn, and sorghum have been reported. However, little information regarding the genetic control of these traits and their relationships with plant productivity in stress environments is available. This situation has made it difficult to make progress in genetic improvement of stress tolerance. Recent advances in gene isolation, gene transfer, and genomic mapping technologies offer new opportunities for the genetic...

Several physiological mechanisms affecting water stress adaption in plants including rice, wheat, corn, and sorghum have been reported. However, little information regarding the genetic control of these traits and their relationships with plant productivity in stress environments is available. This situation has made it difficult to make progress in genetic improvement of stress tolerance. Recent advances in gene isolation, gene transfer, and genomic mapping technologies offer new opportunities for the genetic dissection of water stress tolerance traits in plants. Current information on water deficient tolerance and genetic dissection and crop genetic improvement in water stress are discussed.

植物对水分胁迫适应性的生理机理已相继在水稻、小麦、玉米、高梁等作物中得以报道。然而,有关这些性状的遗传控制及其在与逆境下作物生产的关系却了解甚少,由此阻碍了抗性遗传改良的进展。随着基因定位、基因组图谱、基因转移等分子生物学技术的发展,对植物抗逆性状进行分子剖析成为可能。本文综述了主要禾谷类作物对水分胁迫的抗性生理及遗传研究上的最新进展,讨论了植物抗性遗传改良的发展前景。

 
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