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panicle characters
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  穗部性状
     (2)For panicle characters, GCA of Liuyanl89A, LH422, 7R189 were excellent, and SCA of Cai A/Liuyan 189R, 731A/LH422, 731A/7R189 were excellent.
     (2)穗部性状上,一般配合力好的不育系为六盐189A,恢复系为LH422、7R189。 特殊配合力好的组合有彩A/六盐189R、731A/LH422、731A/7R189。
短句来源
     A pot culture experiment was conducted to study the effects of soil water potentials at ranges from-30 to(-35) kPa,-60 to-65 kPa and 0 kPa(check) during different developmental stages on panicle characters and grain yield by(using) two rice varieties Shangyu 397 and Suijing 3 as materials.
     采用控制土壤水分方法,研究了不同生育阶段土壤水势(-30~-35 kPa和-60~-65 kPa和正常灌水0kPa)对水稻上育397、绥粳3号穗部性状及产量的影响。
短句来源
     A Preliminary Study on Yield and Quality of Rice and Their Relationship with Panicle Characters in Northeast Region of China
     东北三省水稻产量和品质及其与穗部性状关系的初步研究
短句来源
     Hereditary correlation analysis was made on 8 panicle characters in 49 sorghum genotypes in a complete diallel cross.
     采用完全双列杂交法对高粱49个基因型的8个穗部性状进行了遗传相关分析。
短句来源
     Rice Breeding of Panicle Characters
     浅谈穗部性状育种
短句来源
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  穗结构
     Genetic Analysis on Panicle Characters of High Yield Sorghum Hybrid
     高粱高产杂交种穗结构的遗传分析
短句来源
  “panicle characters”译为未确定词的双语例句
     Heterosis and Correlative Analysis of Yield Components and Panicle Characters of Pei-ai64s/E32
     培矮64s/E32产量构成因素和穗部性状的杂种优势及相关分析
短句来源
     The erect panicle type rice G83 was crossed、 testcrossed with the curved panicle type TGMS lines Pei' ai64S, and different panicle type plants of TC_1、 F_2 populations were obtained. The genetics of erect panicle type, and the relationships between panicle types and stem-leaf morphological traits and panicle characters were analyzed.
     以直立穗型品系G83和弯曲穗型温敏核雄性不育系培矮64S为材料,进行杂交、测交,获得F_1、TC_1和F_2群体,研究穗型的遗传规律,分析穗型与茎叶形态性状和穗部性状的关系。
短句来源
     The Performance of Some Panicle Characters of Rice under Low Temperature on the Highlands in Guinea
     几内亚高原地区温度对水稻结实和粒重的效应
短句来源
     The relation between the leaves of the main crop and the panicle characters of the ratooning rice were studied with rice variety Shangyou 63 as material.
     以汕优63为材料,研究了再生稻穗部性状与母茎叶片的关系.
短句来源
     A Genetic Study on Sorghum Panicle Characters
     高粱穗部7个性状的遗传分析
短句来源
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  panicle characters
The 28 morphological characters included 16 spikelet and grain, eight leaf and culm, and four panicle characters, and were analyzed using principal component analysis (PCA) and hierarchical agglomerative cluster analysis.
      


1.Evenness as commonly referred to stand regularities and variability of plant charactersis a problem of some practical significance.Irregularities caused by imperfect germination,planting defect,non-uniformity of seed size are commonly met in ordinary field conditions. The problem has been studied in detail by Engledow and others (6-20).For plant withtillering ability as rice,the question of evenness is more complicated in that the side tillerswhich are consecutively given out,and thus vary greatly in size...

1.Evenness as commonly referred to stand regularities and variability of plant charactersis a problem of some practical significance.Irregularities caused by imperfect germination,planting defect,non-uniformity of seed size are commonly met in ordinary field conditions. The problem has been studied in detail by Engledow and others (6-20).For plant withtillering ability as rice,the question of evenness is more complicated in that the side tillerswhich are consecutively given out,and thus vary greatly in size can develop as independentunits.The present study was undertaken to determine the effect of tillering on the evennessof rice plants of different field densities in the course of development.2.Evenness of any plant character is expressed in terms of a coefficient (C.E.) i.e.x/Sx which is the reciprocal of coefficient of variability (C.V.).The larger the C.E.,thehigher is the evenness.All the observations were made on per tiller basis.From the systema-tic records,however,the evenness at other levels,such as per main shoot,per plant or perhill can be easily calculated.3.At the seedling stage,when no tiller has yet been formed,the C.E.of the denselyplanted plot is higher than that of the sparsely planted plot;at the harvesting stage,thesituation is reversed (Tab.1,2 & Fig.1).The abundancy of tillers and the high degree ofevenness at harvesting stage are always parallel phenomenon,since both are results of favor-able environment conditions under which the plants grow.Dressing at late-tillering stage hasa positive effect on evenness.4.The C.E.of the tiller height varies with developmental stages.In spite of thedifferent planting densities and dressing regimes,the general trend of change is similar.Atthe seedling stage,all tillers (main shoots) are normally distributed about a mean height,thedegree of variability being moderate.At the shooting stage,the C.E.falls to a low valueand the distribution curve becomes skewed and may show two maxima.This change is dueprimarily to the consecutive formation of new tillers on the one hand and the rapid elongation ofolder tillers on the other.The change of C.E.from low to high value from the boltingstage onward is apparently due to two causes:namely,the higher growth rate of the smalltillers over that of the older ones (Tab.4,5 & Fig.2),and the dying off of the very smalltillers (Tab.3).5.In the densely planted plot,the degree of evenness does not show so much changewhen the C.E.'s at the seedling stage and harvesting stage are compared.In such a plot therelative growth rate of the small tillers may never surpass that of the large ones.It isplausible to infer that this failure is due mainly to the shortage of food material necessaryfor rapid growth,as the smaller tillers in a dense plot are severely shaded.6.The rate of height increase of a particular tiller is a function of its own height,thedevelopmental stage and the environmental conditions some of which are affected by the heightdistribution of the surrounding plants.Death of tillers is also dependent on height distribu-tion (Fig.3),none of those which does not elongate at the proper shooting stage becomesfertile.7.Since the tiller weight varies with the cube of the tiller height (Tab.6 & Fig.4),and the panicle weight and number of spikelets are linearly correlated with tiller weight(Tab.10),the C.E.'s of tiller weight,panicle weight and number of spikelets are alwayslower than that of the tiller height.The difference is usually 4-5 folds (Tab.7 & 8).There-fore,relative high evenness in plant height does not necessarily imply high C.E.'s in tillerweight or other panicle characters.8.In fields of ordinary densities,the panicle weight is linearly correlated with the tillerweight.If the total dry weight of the population and the average tiller weight are equal,the degree of dispersion of tiller weight will pratically not affect the final grain yield.

本文通过试验资料分析了稻田整齐度的变化规律。各时期整齐度的高低与分蘖消长及大小蘖生长速度的快慢有密切的关系。在不同密肥条件下,整齐度变化的总趋势均是趋于提高,但稀植多肥的情况下提高较多。文中并用统计方法分析了各项生长指标的整齐度之间的关系,以及整齐度对产量的影响等。

Quantitatively numerical descriptions on the characters of rice panicle using panicle type parameter were both accurate and com- parable. Based on the characteristics of rice particle structure, the study analyzed the characters relating to panicle types and proposed nine parametric formulae concerning panicle characters. Operations on data from experiments showed that apart from logical, simple and practical. These parametric formulae also have great theoretical significance and practical value in plant...

Quantitatively numerical descriptions on the characters of rice panicle using panicle type parameter were both accurate and com- parable. Based on the characteristics of rice particle structure, the study analyzed the characters relating to panicle types and proposed nine parametric formulae concerning panicle characters. Operations on data from experiments showed that apart from logical, simple and practical. These parametric formulae also have great theoretical significance and practical value in plant type breeding and cultivation of rice.

用必要的穗型参数对穗部性状进行定量的数字表达具有精确而可比的特点。本文以水稻穗结构特性为依据,对与穗型有关的性状进行了分析,提出了有关穗部性状的9个参数公式,并用实际测得的数据进行了运算,结果证明这些参数公式合理,简便,实用,对水稻株型育种及栽培具有重要的理论意义和实用价值。

The keng rice variety for later season, "Xiu Shui 27" , with semi-dwarf,long growing period and good yield, was irradiated by 60Co-gamma rays, and some different mutant strains were selected in the following generations. The 9 earlier mutants which were 6-11 days earlier than "Siu Shui 27" , 5 dwarf mutants which were shorter than original variety, 8 mutants which the protein content were toped 6 percent than parent were selected.The thousand grain were heavier and more grains in per panicle were also...

The keng rice variety for later season, "Xiu Shui 27" , with semi-dwarf,long growing period and good yield, was irradiated by 60Co-gamma rays, and some different mutant strains were selected in the following generations. The 9 earlier mutants which were 6-11 days earlier than "Siu Shui 27" , 5 dwarf mutants which were shorter than original variety, 8 mutants which the protein content were toped 6 percent than parent were selected.The thousand grain were heavier and more grains in per panicle were also selected in following generations. After test of resistance, we know that the resistance of most mutant strains were kept as same as original variety,but the resistance of a few mutants were raised.Some mutants not only have kept the better characters which were semidwarf, lodging resistance, blast resistance from original variety, but also have got earliness and large panicle character. So,it has good yield level and maybe become a fine mutant variety. In the other hand, more mutants which have good characters can be used for in rice breeding.

矮秆、丰产、迟熟的晚粳稻品种“秀水27”经辐射诱变处理后,获得了比“秀水27”早熟6—11天的早熟突变新品系9份,株高显著降低的特矮秆突变品系5份,蛋白质含量比亲本高6%以上的突变品系8份。还选到千粒重增加,每穗粒数增多的突变新品系。经抗性接种鉴定,多数突变品系保持了原品种的抗性,还有少数突变品系的抗性比原品种提高,有的品系不仅保持了原品种的矮秆抗倒,较抗稻瘟病,米质较优的特征和特性,而且生育期缩短,每穗粒数增多,提高了丰产水平,很有可能成为直接应用于生产的突变新品种。此外,还产生了一大批具有某些优良性状的育种材料可用作种质资源。

 
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