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选育品种     
相关语句
  bred varieties
     Genetic Diversity of Landrace and Bred Varieties of Wheat in China
     中国小麦选育品种与地方品种的遗传多样性
短句来源
     Genetic diversity of landrace and bred varieties of soybean in Shanxi
     山西省大豆地方品种与选育品种农艺性状及SSR标记遗传多样性比较分析
短句来源
     Except grain color and plant height,the diversity in spike,agronomic and quality characters of bred varieties has the trends to decrease,but to increase in diseases.
     穗部性状、农艺性状和品质性状除粒色和株高外 ,选育品种变异性呈下降的趋势 ,而病害性状多表现出明显的增加。
短句来源
     The genetic diversity of 180 landrace and 184 bred varieties of soybean in Shanxi were studied.
     以山西省地方品种和选育品种为材料,对其质量性状、数量性状及SSR标记进行了遗传多样性分析,旨在探明地方品种与选育品种之间遗传多样性的差异,为山西省大豆品种资源的研究与利用提供理论依据。
短句来源
  modern varieties
     The modern varieties were divided into 10 regions, the landrace into 28 sub-regions.
     地方品种按亚区分为28组,选育品种按大区分为10组。
短句来源
     In the candidate core collections, there are 3283 landraces, and 1684 modern varieties, which takes 28.18% and 14.9% of the basic collections respectively.
     地方品种全部供试材料11694份,初选核心种质3283份,取样比例为28.18%。 选育品种全部11441份,初选核心种质1684份,取样比例为14.9%。
短句来源
     Through these research, genetic diversity level and distribution characteristic, genetic diversity tendency in modern varieties during the past five decades for Chinese wheat genetic resources would be more clear.
     旨在从分子水平上搞清楚中国小麦种质资源遗传多样性的水平和分布特点,以及五十年来中国小麦选育品种遗传多样性的演变趋势,同时,提出西北春麦区5%代表全部种质70%以上遗传多样性的核心种质,以期为中国小麦遗传研究与育种实践提供重要的理论依据和坚实的材料基础。 主要结果如下:
短句来源
     6. A core collection of 195 entries was developed for the modern varieties in Yellow and Huai River Valley Winter Wheat Region.
     6.建立了195个品种的黄淮冬麦区选育品种的核心种质。
短句来源
     3. B genome showed the highest genetic diversity among the three genomes in Chinese common wheat. However, the main genetic differentiation between the landraces and the modern varieties existed in the D genome. The D genome of the landraces conveys more specific alleles.
     3.在我国普通小麦的遗传资源中,虽然B基因组拥有最高的遗传多样性,但地方品种与选育品种之间的遗传差异可能主要存在于D基因组,地方品种在D基因组中拥有较多的特异性等位变异。
短句来源
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  improved varieties
     4.At the level of D=6.54, all the 34 varieties were clustered into two major groups(groupI and groupII) , including landraces, improved varieties and foreign varieties respectively.
     4.甘薯品种的形态标记聚类分析:当第一等级D=6.54时34个品种分为两个类群(类群Ⅰ和类群Ⅱ),两个类群中都包含了地方品种、选育品种和外来品种。
短句来源
     Four isozymes including esterase (EST), malatedehydraogenase(Mal), phosphoglucose isomerase (Pgi) and aminiopeptidase (Amp) were used to analyze 462 rice improved varieties.
     利用酯酶、苹果酸酶、氨肽酶、磷酸葡萄糖异构酶四种等位酶对462份水稻选育品种进行分析。
短句来源
     Thirty six SSR (simple sequence repeats) loci distributed at 12 chromosomes evenly were used to analyze 520 rice improved varieties.
     利用平均分布于12条染色体的36对SSR引物对我国水稻选育品种的520份水稻选育品种进行分析。
短句来源
     Seven hundred and forty four Chinese rice improved varieties with different ecotypes bred in 1931-1998 were selected to detect the genetic diversity by 12 allele loci of five allozymes and analyze the correlation between allozyme distance and morphological traits distance.
     选取源自我国 2 6个省 (自治区、直辖市 )不同选育时期、不同类型的 74 4份栽培稻选育品种为试验材料 ,应用 5种等位酶 12个等位基因位点分析我国栽培稻选育品种的遗传多样性 ,并研究等位酶和形态学性状在多样性研究中的相关性。
短句来源
  “选育品种”译为未确定词的双语例句
     There were 48 4% and 32 7% cultivars lacking Gly m Bd 28K allergen in the local varieties and breeding lines.
     地方品种 ( 1 2 6份 )和选育品种 ( 49份 )中缺失 2 8K过敏蛋白比例分别为 48 4 %和 32 7% ;
短句来源
     The exam have 9 breeds,the breed Dian86-5was the comparison.
     试验共有参试组合9个,随机区组排列,以云南省农科院粮食作物研究所选育品种滇86-5为对照种。
短句来源
     The effect on root length development of “Hei 2” and “Ningzhen 3” in soybean and of conventional cultivars “Taixingheidou” was significant at even lower than 1 0 μg/kg and at 5 μg/kg,respectively.
     当绿黄隆剂量为1.0μg/kg时,杂交大豆品种(系)“黑2”和“宁镇3号”的根生长受到显著抑制,而常规系统选育品种“泰兴黑豆”则在5μg/kg时才受到显著抑制。
短句来源
     7.346, 6.156, 6.056, 5.752 and 5.613 for the artificially selected Changbaishan, Shuangyang, Siping, Xifeng and Oadong sika, and 11.760, 12.894, 11.175 and 7.358 for the artificially selected Tianshan Qingyuan, Qingyuan, Talimu and Wulanba wapiti, respectively.
     人工选育品种品系长白山品系、双阳、四平、西丰和敖东品种梅花鹿的茸料比分别为 7 346 ,6 15 6 ,6 0 5 6 ,5 75 2 ,5 6 13,天山马鹿清原品系和清原塔里木、乌兰坝马鹿品种的茸料比分别为 11 76 0 ,12 894 ,11 175 ,7 35 8。
短句来源
     The lacking ratio of Gly m Bd 28K in Landraces (40.4%)was slightly higher than that of inbreed varieties.
     地方品种的28K 过敏蛋白缺失比率(40.4%)高于选育品种,但未达到显著水平。
短句来源
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  bred varieties
Based on the marker data an UPGMA-cluster analysis and principal component analysis (PCA) separated the Daucus collections into three groups, consisting of the wild populations, the old varieties, and the recently bred varieties.
      
Samples of young shoot, mature leaf, twig, root, and litter were taken from four recently bred varieties Zhe-nong 113, Zhe-nong 121, Zi-sun, and Bi-feng grown at two tea plantations located at Zhejiang and Jiangsu Provinces.
      
In the Netherlands the home-bred varieties are developed almost entirely by private establishments.
      
Thus the phenotypical uniformity will be high, while the genetical variability is larger than in commercial bred varieties, but much less than in populations grown in a gene centre.
      
Such logical approaches result in savings on seeds, since cost of biotech seeds can be higher than traditionally bred varieties.
      
  modern varieties
Genetic diversity of 1680 modern varieties in Chinese candidate core collections was analyzed at 78 SSR loci by fluorescence detection system.
      
The genetic base of modern varieties is becoming narrower and narrower.
      
Electrophoretic polymorphism was surveyed for nine enzymes among 39 wild and noble sugarcane clones, belonging to the species most closely related to modern varieties.
      
Phureja Group consists of potato landraces widely grown in the Andes from western Venezuela to central Bolivia, and forms an important breeding stock due to their excellent culinary properties and other traits for developing modern varieties.
      
The Chilean clone "Rough Purple Chili", introduced by Chauncey Goodrich in 1851, is in the pedigrees of almost all modern varieties.
      
更多          
  bred variety
Selection for yield under spaced plant conditions was carried out for three generations in five lines of Lolium perenne derived from natural populations and of known genetic organisation, and for two generations from within the bred variety S.23.
      
  improved varieties
Ecological stable, fast-growing and high-yield larch plantations can be established through integrative nutrient management and utilization of improved varieties.
      
This study could provide theoretical reference for working out the production plan of improved varieties and other management measures in seed orchard ofLarix principis-rupprechtii.
      
The implications of these results in relation to selection of improved varieties of the host species are discussed.
      
Our findings are in support of the strategy of pyramiding major genes and QTLs in carefully selected combinations to develop improved varieties with resistance to the blast fungus that is both broad in spectrum and durable.
      
Careful selection against the regions associated with negative effects will be required to avoid unwanted grain quality characteristics during the development of improved varieties for yield and yield components using introgressions from O.
      
更多          
  其他


This report introduces the results and major problems of rice breeding in Japan.In the last 60 years,352 rice varieties were registered

本文介绍了日本水稻育种成果及存在问题,近60年来日本农林省登记的品种有352个,连续种植20年的品种有越光、笹锦,日本晴等。试验表明,随年代的演变选育的品种有高产、早熟、矮秆,抗倒伏,抗稻瘟病的趋势,米质和耐冷性也明显提高。但近年来出现品种单一化现象,遗传资源也很贪乏,就育成的品种数量和作用而言,育种进展不大。

YS-59 is a new variety of mulberry which was bred from the mulberry introduced from Soviet Union. Its suitable both for young and grown silkworms. Sponsored by our institute and in coorperation with some others we implemented individual selections. Eventually it was set as a final selection variety since 1978. It manifested excellent results through appraisal and assigned experiments. Through demonstration and popularization during 1979-1984 its physical characters, properties and values for extensions were...

YS-59 is a new variety of mulberry which was bred from the mulberry introduced from Soviet Union. Its suitable both for young and grown silkworms. Sponsored by our institute and in coorperation with some others we implemented individual selections. Eventually it was set as a final selection variety since 1978. It manifested excellent results through appraisal and assigned experiments. Through demonstration and popularization during 1979-1984 its physical characters, properties and values for extensions were affirmed. The period from the primary,secondary selection to final selections covered 20 years. The maternal plant was designated as 59-C. The main characters of this new variety possess a vigorous growth at the early stage, abundant tender branches; the tips of the trees grow quickly with big leaf blades, short inter-nodes; the leaves are of high quantity, good quality and ripe quickly. It possesses high efficacy in feeding silkworms than that of Japanese JC breed for young worms and the QY breed we are using in Jilin at present.Its an excellent variety for young and grown worms. Still its durable and easy to store and suitable for accelerate and close planting of ground trunk and low trunk mulberry fields.

延桑59为自苏联引进延边,经长期选优育成的稚蚕、兼全龄用桑新品种.经所内外结合,进行个体选择后,于1978年决选,并先后进行所内外鉴定试验和指定试验,表现优良.经1979—1984年示范推广,明确其特征和特性以及推广价值,从初选、复选到决选共用了20年时间.其母本简化号为59—C.选育品种延桑59的主要特点是,前期生长旺盛、嫩枝较多、新梢生长快,叶形大、枝态紧凑、节间密、产叶量高、叶质优良,叶片成熟快.养蚕效果优于日本稚蚕用桑品种剑持和本省现行推广品种秋雨桑,是优良的稚蚕、兼全龄用桑品种.并具有耐伐、耐贮,适于地桑、低干速成密植桑园栽植的特点.

A new mathematical model (PTAA) is proposed for the quantitative description of wheat canopy structure by simply measuring plant height, spike length, peduncle and basal internode, culm diameter, etc.with a microcomputer. This model is considered as a candidate for description of wheat LAI vertical distribution in canopy. The differences of canopy structure and extinction coefficient(K) vertical distribution in canopy among 21 wheat cultivars and different planting density in the same cultivat were studied by...

A new mathematical model (PTAA) is proposed for the quantitative description of wheat canopy structure by simply measuring plant height, spike length, peduncle and basal internode, culm diameter, etc.with a microcomputer. This model is considered as a candidate for description of wheat LAI vertical distribution in canopy. The differences of canopy structure and extinction coefficient(K) vertical distribution in canopy among 21 wheat cultivars and different planting density in the same cultivat were studied by using this model. The differences of these characters among different cultivars and different planting density in the same cultivat were significant at P 0.01 and P 0.05 level, respectively. The value of broad heritability of K is 76.9%. There is no relationship between K and grain yield, but the influence of vertical distribution of K on grain yield is significant. In the lower Yangtse valley, the centre of gravity of high-yield wheat variety canopies is higher than that of others, and the K of upperlevel is bigger than that of others. It is possible to breed highyield variety according to selection of canopy structure and extinction coefficient vertical distribution, because a simple PTAA needs not destroysamples.

拟定了快速而无需破坏样本的“株型结构分析法”及其计算机程序。调查了小麦冠层结构与消光系数(K值)分布在21个基因型间和同一基因型的不同处理间的差异。对该方法所作的验证表明:采用该法调查结果和分层切片法与Ross法的结果基本一致。此法是可靠的。冠层结构与K值垂直分布在基因型间差异极显著;同一基因型不同密度之间仅达显著程度。K值是比较稳定的遗传性状,广义遗传力为76.9%。总K值对籽粒产量影响不大。由于长江下游地区辐射条件较差,高产群体表现出冠层重心较高,K值分布呈上层大、中层小的特点。说明该地区选育的品种上部叶水平角宜小(倾斜至水平),中部叶宜直立。讨论中提出了以株型结构分析法对K值分布作选样和培育高产品种的可能性。

 
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