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玉米育种
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  maize breeding
     The results showed that the integrate characters of maize breeding were growing period of 100.1~104.0 days, plant height of 250.1~270.0cm, and for the spike, 110.1~120.0cm in position, 17.1~19.0cm in length, 14.6~15.5 rows, 520.1~560.0 grains and 330.1~350.0g per 1000 grains in weight.
     研究结果表明:山东高产玉米育种综合选育目标为生育期100.1~104.0d,株高250.1~270.0cm,穗位高110.1~120.0cm,穗长17.1~19.0cm,穗行数14.6~15.5行,穗粒数520.1~560.0粒,千粒重330.1~350.0g。
短句来源
     The Application of Single Gene br_(-2) Dwarf Strain in Maize Breeding
     单基因br_(-2)矮生系在玉米育种中的应用
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     K10had become one of the leading self lines in the maize breeding of Heilongjiang province.
     K10已成为黑龙江省玉米育种的骨干自交系之一。
短句来源
     Application of 'Tie7922' Derived Lines in Maize Breeding and Production
     铁7922衍生系在玉米育种及生产上的应用
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     Develop New Ways of Maize Breeding by Technological Innovation
     通过技术创新,开展玉米育种新途径——玉米倍性育种技术及杂优研究
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  corn breeding
     Proceeding of Biotechnology Application in Sweet Corn Breeding
     生物新技术在甜玉米育种中的应用研究进展
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     Some Advice on Corn Breeding Obtained from the Elite Varieties of Nongda108 and Zhengdan 958
     从农大108和郑单958中得到的玉米育种启示
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     Application of Grey Incidence Analysis on Corn Breeding
     灰色关联分析在玉米育种上应用的研究
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     Discuss on the Present Situation and Development Direction of Corn Breeding in Danyu Series
     丹玉系列玉米育种现状和发展方向探讨
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     This paper analysed primary of germ on Hybird corn based on hybird corn grown in large scale in Shanxi province from 1995 to 1999,corn variety approved from 1994 to 1996,and corn new combination of regional test attended from 1994 to 1997.The result showed that corn breeding has a great development,but blastogenses base of corn was very narrow,so further effort is needed.
     从 1995~ 1999年山西省大面积生产所用的杂交种、1994~ 1996年审 (认 )定的玉米品种和1994~ 1997年参加区域试验的玉米新组合的资料 ,着手分析山西省玉米杂交种的种质基础 ,表明山西省玉米育种有了很大的发展 ,但仍需继续努力
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  maize hybrid breeding
     Moreover, it is important and essential to match with the other traits improvements like photosynthetic rate,This is the only way for the creation of maize germplasm and breeding method of East Hebei summer maize hybrid breeding.
     此外,自交系的种质基础和选育方法要有创新,要和光合生理等性状改良综合起来,才是冀东夏玉米育种的必由之路。
短句来源
     Maize germplasm improvement was the basic of maize hybrid breeding. It was named for Pre -breeding in developed countries. Recurrent selection was basic method and was the core technology for maize germplasm improvement and innovation.
     群体改良是现代玉米育种的基础环节,非常重要,在国外被称作前育种(Pre-breeding),是玉米种质改良创新的核心技术。
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  “玉米育种”译为未确定词的双语例句
     The genes su1, sh2, se, bt1, bt2, ae, wx and du are widely used for the breeding of sweet corn, and they are all related to carbohydrate metabolism of corn endosperm.
     目前在甜玉米育种中常用的基因有su_1、sh_2、se、bt_1、bt_2、ae、wx、du等,它们都与胚乳碳水化合物代谢有关.
短句来源
     Genetic Characteristics of Maize Inbred Stock6 and Its Application in Breeding
     玉米Stock6的遗传特性及其在玉米育种上的应用
短句来源
     It was suggested to the aims,standards of selection the base and later periods material,methods of the super-maize breeding.
     总结提出了超级玉米育种的各种具体目标、选择基础材料与杂交后代的标准及提高育种效率的超级玉米育种方法。
短句来源
     Two inbred lines of maize,ZA5716 and ZA6192,with high combining ability and disease resistance,were obtained from a breeding population improved by recurrent selection.
     从轮回选择法改良的玉米育种群体中,选育出了配合力高、抗病性强的玉米新自交系ZA5716和ZA6192。
短句来源
     Application Genetic Mutant for Improvement of Particular Maize—Ⅷ.Discussion on Plant Breeding and Application Technology of Popcorn
     利用遗传突变基因改良特用玉米——Ⅷ.爆裂玉米育种与应用技术探讨
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  maize breeding
To alleviate this problem, a marker-assisted selection procedure was developed for the Texas A>amp;amp;M University Quality Protein Maize breeding program.
      
The assumption made was that Uq might have provided the variation that has contributed to maize breeding progress.
      
Hence, hematoxylin staining of Al-stressed root apices appears to be a powerful tool to assist in Al-tolerance selection in tropical maize breeding programs.
      
We report here the construction and characterisation of a BAC library from the maize flint inbred line F2, widely used in European maize breeding programs.
      
A total of 32 other inbreds represented historical inbreds that were once important in maize breeding.
      
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  corn breeding
Reports in the literature suggest that the variability reported here for the BSSS population should be representative of that present in other corn breeding populations.
      
Fatty acid composition of oil from adapted, elite corn breeding materials
      
To this end, a survey of 418 corn hybrids and 98 corn inbreds grown in Iowa was done to determine the fatty acid composition of readily-available, adapted, elite corn breeding materials.
      
This study shows that for some attributes, a breeding program involving adapted corn breeding materials might produce the desired oil.
      
Fatty acid composition of oil from exotic corn breeding materials
      
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  maize hybrid breeding
The evaluation of germplasm to identify its potential as a source of new favorable alleles is a time-consuming phase of maize hybrid breeding programs.
      
Certain inbred lines displayed sufficient genetic potential for use in a quality protein maize hybrid breeding programme.
      


By studying ample results on corn breeding, the author put forth the following summary on the relation between the phenotypic expressions of the inbred lines and the heterosis of their F1 hybrids. To meet the need for analytical purpose, the inbred lines studied were classified as 5 plant-types, 3 ear-types and 5 tassel-types.1. There is greater possibility to obtain strong heterosis by using the inbred lines of different plant-types in the cross. This is especially true when the parental com-tinations are normal...

By studying ample results on corn breeding, the author put forth the following summary on the relation between the phenotypic expressions of the inbred lines and the heterosis of their F1 hybrids. To meet the need for analytical purpose, the inbred lines studied were classified as 5 plant-types, 3 ear-types and 5 tassel-types.1. There is greater possibility to obtain strong heterosis by using the inbred lines of different plant-types in the cross. This is especially true when the parental com-tinations are normal × cylindrical, normal × long-cylindrical, normal × pyramidal, normal × fan-shaped, cylindrical × fan-shaped and pyramidal × fan-shaped.2. There is greater possibility to obtain strong heterosis when the ear of both parents or one of them belongs to the I-types (husks much longer than the core).3. The possibility of obtaining strong heterosis is also greater by pairing the parents with tassels of medium development. This possibility is not found in crossing the parents with well developed tassels.4. It is rather earier to obtain strongly vigorous hybrid with increased number, weight and quality of kernels by crossing a parent of large or medium dent type with more rows per ear (16 or more) and more kernels per row with the other parent of half-dent or flint type with more rows per ear or more kernels per row.5. A strongly vigorous hybrid resistant to Helminthosporium leaf spots is only expedient when both parents are resistant, or by crossing a resistant parent with a less susceptable or little resistant parent.

本文依据玉米育种实践和亲本性状遗传规律的资料,从亲本自交系外部性状与杂种优势的关系上,进一步探讨如何有预见地组配强优势玉米杂交种的问题。研究结果表明,亲本的“株型”、“果穗类型”、“雄穗类型”、“果穗性状”和“抗大、小叶斑病性能”等主要性状,与杂种优势的大小有着一定的联系。根据亲本自交系的上述性状的差异,选择并合理搭配杂交组合,可以大大提高强优势杂交种出现的机率,从而提高了搭配杂交组合的预见性,减少了杂交育种工作中的盲目性。

Combining ability is considered as a most important genetic character. Traditional methods of determination for combining ability of inbreds seem not to adapt to the modern corn breeding since single cross is the main object in the breeding program. Many results from different experiments and all the facts in the hybrid corn production show that it is sufficiently to find out inbreds with high general combining ability(GCA) from early stage population of inbred with only one high GCA inbred as a tester. According...

Combining ability is considered as a most important genetic character. Traditional methods of determination for combining ability of inbreds seem not to adapt to the modern corn breeding since single cross is the main object in the breeding program. Many results from different experiments and all the facts in the hybrid corn production show that it is sufficiently to find out inbreds with high general combining ability(GCA) from early stage population of inbred with only one high GCA inbred as a tester. According to the results of some experiments the writer discussed the significance of selection for Poly-resistant Inbred and the harmful influence of attempting to search alone Superfluous resistance for certain disease. The writer made some suggestions in strengthening breeding and utilization of excellent new inbreds.

配合力是玉米自交系最重要的遗传特性。传统的配合力测定方法已不适应于直接应用单交种为主的现代玉米育种。试验和实践表明,只用一个具有高配合力的自交系作为测验种,足可从早代群体中测别出一般配合力上的高配合力系。根据有关试验结果,作者也讨论了选育多抗系的重要意义和对单一病害片面追求过高抗性的有害影响,并对加强优良新自交系的选育和利用,提出了有关建议。

Based on the estimates of means,genetic variances,genetic coeffi-cients of variation,heritabilities,and correlations among characters of slfamilies of synthetic D.O.opaque-2 and Elite Synthetic opaque-2,therewas considerable genetic variability for the traits:degree of endospermtranslucence,kernel density,protein content,lysine and zein content,etc.Most of the traits were correlated with each other.The degree ofendosperm translucence and kernel density are two main indicators inmeasuring modifier gene frequency...

Based on the estimates of means,genetic variances,genetic coeffi-cients of variation,heritabilities,and correlations among characters of slfamilies of synthetic D.O.opaque-2 and Elite Synthetic opaque-2,therewas considerable genetic variability for the traits:degree of endospermtranslucence,kernel density,protein content,lysine and zein content,etc.Most of the traits were correlated with each other.The degree ofendosperm translucence and kernel density are two main indicators inmeasuring modifier gene frequency of opaque-2 gene locus and have im-portant influence on the chemical components related to the proteinquantity and quality.Moreover,the degree of endosperm translucence is asimpler measurement,which has a larger genetic coefficient of variationand higher heritability.Therefore,its response to selection should begreater than to other traits.Endosperm translucence was related withother chemical components.In a breeding program of high lysine opaque-2 maize,the visual selection for endosperm translucence can be used asa main selection criterion in altering the opaque-2 modifier gene frequen-cy and some chemical components.

根据对高油抗病奥帕克-2玉米综合种(Syn DO O_2)和优良系奥帕克-2综合种(Elite Syn O_2)自交一代与胚乳有关性状的平均数、遗传方差、遗传变异系数、遗传力和性状相关等参数的估计和分析,发现两个群体的胚乳透明度、籽粒容重、蛋白质含量、赖氨酸和玉米醇溶蛋白含量等所有被测性状都存在着巨大的遗传变异,而且多数性状之间存在着不同程度直接或间接的遗传相关。胚乳透明度和籽粒容重是度量奥帕克-2(O_2)基因位点修饰基因频率变化的重要指标,并不同程度地影响到与蛋白质数量和质量有关的化学成分上。胚乳透明度度量简单,遗传变异系数大,遗传力高,因而选择效率数倍乃至数十倍于其它被测性状,并和那些测试复杂的化学成分关系密切,因而,在高赖氨酸的奥帕克-2玉米育种中,对胚乳透明度的目测选择,可以作为判断修饰基因频率和某些化学成分的主要依据。

 
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