共查询到17条相似文献，搜索用时 187 毫秒
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论述了如何应用SAS过程解决格里芬双列杂交育种法3的配合力分析问题，主要用到iml过程及各种平方和的变形公式，并以实例示明具体计算法。 相似文献
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双列杂交育种法配合力分析的SAS实施 总被引：1，自引：1，他引：0
论述了如何应用SAS过程解决格里芬双列杂交育种法1的配合力计算问题，主要须用到transpose过程、merge语句及统计代换Z＝Y±X，并以实例示明具体计算法。此法具有国际普遍适用的价值。 相似文献
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本研究首次把经典随机区组设计的统计分析方法由单变元推广到多变元,使得试验的多性状记录能综合在一起进行分析,以得出考虑了性状间相关性在内的统计结论,并结合橡胶幼苗肥料试验实例给出了MINITAB统计程序。 相似文献
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双列杂交育种法配合力统计分析(单变元)的SAS实施 总被引：1，自引：0，他引：1
论述了如何应用SAS过程解决格里芬双列杂交育种法4的配合力计算问题,其中应用了transpose过程、merge语句及统计代换Z=Y+X,并以实例示明具体计算法。此法具有国际普遍适用的价值。 相似文献
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格里芬双列杂交育种方法2配合力分析的SAS实施 总被引：1，自引：0，他引：1
论述了应用SAS过程解决格里芬双列杂交育种方法2的遗传型显著性测验和配合力计算问题,主要须用到transpose过程、merge语句及统计代换w=(x+y)/b和z=y+x,并以实例示明具体计算法.此法具有国际普遍适用的价值. 相似文献
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格芬双列杂交育种方法2配合力分析的SAS实施 总被引：2，自引：1，他引：1
论述了应用SAS过程解决格里芬双列杂交育种方法2的遗型显性测验和配合力计算问题，主要须用到transpose过程、merge语句及统计代换ω=(x y)/b和z=y x，并以实例示明具体计算法，此法具有国际普遍适用的价值。 相似文献
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双列杂交育种法中一般配合力与特殊配合力的统计分析 总被引：1，自引：3，他引：1
近三十年来,双列杂交育种法在育种试验中已普遍应用。有关一般配合力与特殊配合力的估算及假设测验方法,在Jinks,Griffing及Hayman的文章中均有述及(1953-1956)。然而,这些分析法的导出却没有阐述过。本文详尽地推导了不同模型下的平方和及期望均方的计算方法,旨在为育种家们提供方便的参考资料,促进双列杂交育种法的更广泛应用。 相似文献
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按照完全双列杂交设计,分析了6个非洲地区主要红麻品种和30个F1组合的杂种优势以及配合力,试验结果表明:1)加性和显性效应对参试品种性状具有同样的重要性。2)大部分品种具有中亲和高亲杂种优势,证实了杂交育种将提高红麻的产量及品质。3)亲本Tainung在所有参试性状综合表现为超级亲本,亲本Endora在产量性状的一般配合力上表现最佳。 相似文献
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按照完全双列杂交设计，分析了6个非洲地区主要红麻品种和30个F1组合的杂种优势以及配合力，试验结果表明：1）加性和显性效应对参试品种性状具有同样的重要性。2）大部分品种具有中亲和高亲杂种优势，证实了杂交育种将提高红麻的产量及品质。3）亲本Tainung在所有参试性状综合表现为超级亲本，亲本Endora在产量性状的一般配合力上表现最佳。 相似文献
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高粱几个亲本的配合力分析王淑文（沈阳市农科院）在高粱杂交育种中利用配合力分析方法测定亲本性状，有助于正确地选择亲本和尽早地评定优良组合，从而提高育种效率。本试验利用配合力分析方法鉴定我院新引进的不育系和自选的几个常用恢复系的主要６个数量性状的一般配合... 相似文献
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There has been a significant advancement in the application of statistical tools in plant pathology during the past four decades. These tools include multivariate analysis of disease dynamics involving principal component analysis, cluster analysis, factor analysis, pattern analysis, discriminant analysis, multivariate analysis of variance, correspondence analysis, canonical correlation analysis, redundancy analysis, genetic diversity analysis, and stability analysis, which involve in joint regression, additive main effects and multiplicative interactions, and genotype-by-environment interaction biplot analysis. The advanced statistical tools, such as non-parametric analysis of disease association, meta-analysis, Bayesian analysis, and decision theory, take an important place in analysis of disease dynamics. Disease forecasting methods by simulation models for plant diseases have a great potentiality in practical disease control strategies. Common mathematical tools such as monomolecular, exponential, logistic, Gompertz and linked differential equations take an important place in growth curve analysis of disease epidemics. The highly informative means of displaying a range of numerical data through construction of box and whisker plots has been suggested. The probable applications of recent advanced tools of linear and non-linear mixed models like the linear mixed model, generalized linear model, and generalized linear mixed models have been presented. The most recent technologies such as micro-array analysis, though cost effective, provide estimates of gene expressions for thousands of genes simultaneously and need attention by the molecular biologists. Some of these advanced tools can be well applied in different branches of rice research, including crop improvement, crop production, crop protection, social sciences as well as agricultural engineering. The rice research scientists should take advantage of these new opportunities adequately in adoption of the new highly potential advanced technologies while planning experimental designs, data collection, analysis and interpretation of their research data sets. 相似文献
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为了解甘蔗亲本组合的遗传特性和育种潜力,准确地评价筛选甘蔗杂交亲本组合,采用甘蔗家系评价试验方法,利用R软件计算亲本和组合的主要性状的配合力,对126个亲本、146个组合的蔗产量、锤度、锤重配合力进行聚类分析。结果筛选出适合作母本的高糖高产类的甘蔗亲本15个,适合作父本的高糖高产类的甘蔗亲本13个;筛选出高糖高产类甘蔗杂交组合13个。结果表明,利用甘蔗配合力+聚类分析方法可有效地对甘蔗杂交亲本组合进行综合分析。YT00-236×GT96-211、GT02-761×NJ03-218和CP92-1167×CP07-2547这3个组合配合力高,综合性状较好,可作为甘蔗杂交育种的生产性组合加以利用。 相似文献
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E.M. Magnus E. Bråthen S. Sahlström E.Mosleth Færgestad M.R. Ellekjær 《Journal of Cereal Science》1997,25(3):289-301
The effects of variety, mixing conditions and fermentation time on bread loaf characteristics were studied by univariate and multivariate statistical methods. Nearly all the measured bread loaf characteristics were significantly affected by variety, fermentation time, and mixing conditions. Significant interactions were also found. Multivariate analysis (principal component analysis; PCA), was used to find the main variation among the bread samples and to identify the bread loaf characteristics that contributed to describe this variation. The characteristics loaf volume and weight described a large part of the main variation among the loaves and these characteristics were studied in more detail by response surface methodology. The loaf volume and weight response surfaces for varieties, which by multivariate analysis were found to have common properties, followed similar general patterns. It was shown that the experimental design used provided information about the baking performance of wheat flours over a wide range of experimental conditions and, thus, can be a useful supplement to standardised and optimised baking tests. 相似文献
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Modern biotechnology,based on recombinant DNA techniques,has made it possible to introduce new traits with great potential for crop improvement.However,concerns about unintended effects of gene transformation that possibly threaten environment or consumer health have persuaded scientists to set up pre-release tests on genetically modified organisms.Assessment of‘substantial equivalence’concept that established by comparison of genetically modified organism with a comparator with a history of safe use could ... 相似文献