检索结果-南通市图书馆

加拿大大豆育种和生产研究概况及展望

引用

大豆科学 2008年第2期27卷 320-325页

作者：廖林 istvan rajcan Department of Plant Agriculture OACUniversity of Guelph

通过对加拿大大豆科研和生产概况的阐述,明确了加拿大大豆遗传育种方向、研究内容和方法;分析了加拿大大豆生产、工业发展和市场需求;同时指出了加拿大未来农业和大豆产业的发展趋势和策略。

关键词：大豆遗传育种生产策略

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Classification of Soybean Pubescence from Multispectral Aerial Imagery

引用

Plant Phenomics 2021年第1期3卷 156-166页

作者： Robert W.Bruce istvan rajcan John Sulik Department of Plant Agriculture University of GuelphGuelphONCanada

The accurate determination of soybean pubescence is essential for plant breeding programs and cultivar ***,soybean pubescence is classified visually,which is a labor-intensive and time-consuming ***,the three classes of phenotypes(tawny,light tawny,and gray)may be difficult to visually distinguish,especially the light tawny class where misclassification with tawny frequently *** objectives of this study were to solve both the throughput and accuracy issues in the plant breeding workflow,develop a set of indices for distinguishing pubescence classes,and test a machine learning(ML)classification approach.A principal component analysis(PCA)on hyperspectral soybean plot data identified clusters related to pubescence classes,while a Jeffries-Matusita distance analysis indicated that all bands were important for pubescence class *** images from 2018,2019,and 2020 were analyzed in this study.A 60-plot test(2019)of genotypes with known pubescence was used as reference data,while whole-field images from 2018,2019,and 2020 were used to examine the broad applicability of the classification *** indices,a red/blue ratio and blue normalized difference vegetation index(blue NDVI),were effective at differentiating tawny and gray pubescence types in high-resolution imagery.A ML approach using a support vector machine(SVM)radial basis function(RBF)classifier was able to differentiate the gray and tawny types(83.1%accuracy and kappa=0:740 on a pixel basis)on images where reference training data was *** tested indices and ML model did not generalize across years to imagery that did not contain the reference training panel,indicating limitations of using aerial imagery for pubescence classification in some environmental ***-throughput classification of gray and tawny pubescence types is possible using aerial imagery,but light tawny soybeans remain difficult to classify and may require training da

关键词： indices spectral consuming

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国大豆花叶病抗源和抗性鉴别寄主的鉴定与评价

引用

大豆科学 2010年第6期29卷 982-989页

作者：廖林 rajcan istvan 陈鹏印 Buss Gleen Tolin Sue 杨振宇董志敏王曙明 Department of Plant Agriculture University of Guelph Department of Crop Soil and Environment SciencesUniversity of Arkansas Department of Crop and Soil Environment Sciences Virginia TechBlacksburg Department of Plant Pathology Physiology& Weed ScienceVirginia TechBlacksburg 吉林省农业科学院大豆研究中心吉林长春130033

收集大豆抗大豆花叶病(SMV)抗源和鉴别寄主40份,通过接种Cho和Goodm an划分的抗大豆花叶病毒株系SMV G1-G7,了解这些材料对该株系的抗性反应。同时比较了其中部分材料对中国学者划分的SMV Sc1-Sc17株系的抗性反应。结果感病材料无论对SM... 详细信息

收集大豆抗大豆花叶病(SMV)抗源和鉴别寄主40份,通过接种Cho和Goodm an划分的抗大豆花叶病毒株系SMV G1-G7,了解这些材料对该株系的抗性反应。同时比较了其中部分材料对中国学者划分的SMV Sc1-Sc17株系的抗性反应。结果感病材料无论对SMV G1-G7株系,还是SMV Sc1-Sc17株系均表现感病;但是,齐黄1、科丰1、早18和8101等对SMV G1-G7株系均表现抗病的材料,对SMV Sc1-Sc17株系却表现出部分抗病;而另外一些材料,如:诱变30、徐豆1、文丰5、铁6915、齐黄10和Harosoy等对SMV G1-G7株系的抗性反应却与北美的鉴别寄主相同。结果表明:无论是对SMV G1-G7株系,还是对SMV Sc1-Sc17株系,抗病材料的抗性遗传基础是相似的;中国一些大豆花叶病毒株系的致病力强于国外的株系。因此,结合国外的SMV株系鉴定系统,创建一套统一的SMV株系鉴定系统是可行的。

关键词：大豆大豆花叶病(SMV) SMV株系 SMV株系鉴别寄主 SMV株系鉴定系统

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

QTL analysis of soft scald in two apple populations

引用

Horticulture Research 2016年第1期3卷 117-123页

作者： Kendra A McClure Kyle M Gardner Peter MA Toivonen Cheryl R Hampson Jun Song Charles F Forney John DeLong istvan rajcan Sean Myles Department of Plant and Animal Sciences Faculty of AgricultureDalhousie UniversityTruroB2N 5E3Nova ScotiaCanada Department of Plant Agriculture Crop Science BuildingUniversity of GuelphGuelphN1G 2W1OntarioCanada Agriculture and Agri-Food Canada Fredericton Research and Development CentreFrederictonE3B 4Z7New BrunswickCanada Agriculture and Agri-Food Canada Summerland Research and Development CentreSummerlandV0H 1Z0British ColumbiaCanada Agriculture and Agri-Food Canada Kentville Research and Development CentreKentvilleB4N 1J5Nova ScotiaCanada

The apple(Malus×domestica Borkh.)is one of the world’s most widely grown and valuable fruit *** demand for apples year round,storability has emerged as an important consideration for apple breeding *** scald is a cold storage-related disorder that results in sunken,darkened tissue on the fruit *** breeders are keen to generate new cultivars that do not suffer from soft scald and can thus be marketed year *** breeding approaches are protracted and labor intensive,and therefore marker-assisted selection(MAS)is a valuable tool for *** advance MAS for storage disorders in apple,we used genotyping-by-sequencing(GBS)to generate high-density genetic maps in two F1 apple populations,which were then used for quantitative trait locus(QTL)mapping of soft *** total,900 million DNA sequence reads were generated,but after several data filtering steps,only 2%of reads were ultimately used to create two genetic maps that included 1918 and 2818 single-nucleotide *** QTL associated with soft scald were identified in one of the bi-parental populations originating from parent 11W-12-11,an advanced breeding *** study demonstrates the utility of next-generation DNA sequencing technologies for QTL mapping in F1 populations,and provides a basis for the advancement of MAS to improve storability of apples.

关键词： breeding cultivar apple

来源：

维普期刊数据库评论