检索结果-南通市图书馆

Eff-3DPSeg:3D Organ-Level Plant Shoot Segmentation Using Annotation-Efficient Deep Learning

Plant Phenomics 2023年第3期5卷 626-641页

作者： Liyi Luo Xintong Jiang Yu Yang Eugene Roy Antony Samy mark lefsrud Valerio Hoyos-Villegas Shangpeng Sun Bioresource Engineering Department McGill UniversityMontrealQCCanada Key Laboratory of Advanced Process Control for Light Industry(Ministry of Education) Jiangnan UniversityWuxiJiangsuChina Plant Science Department McGill UniversityMontrealQCCanada

Reliable and automated 3-dimensional(3D)plant shoot segmentation is a core prerequisite for the extraction of plant phenotypic traits at the organ *** deep learning and point clouds can provide effective ways to address the ***,fully supervised deep learning methods require datasets to be point-wise annotated,which is extremely expensive and *** our work,we proposed a novel weakly supervised framework,Eff-3DPSeg,for 3D plant shoot ***,high-resolution point clouds of soybean were reconstructed using a low-cost photogrammetry system,and the Meshlab-based Plant Annotator was developed for plant point cloud ***,a weakly supervised deep learning method was proposed for plant organ *** method contained(a)pretraining a self-supervised network using Viewpoint Bottleneck loss to learn meaningful intrinsic structure representation from the raw point clouds and(b)fine-tuning the pretrained model with about only 0.5%points being annotated to implement plant organ ***,3 phenotypic traits(stem diameter,leaf width,and leaf length)were *** test the generality of the proposed method,the public dataset Pheno4D was included in this *** results showed that the weakly supervised network obtained similar segmentation performance compared with the fully supervised *** method achieved 95.1%,96.6%,95.8%,and 92.2%in the precision,recall,F1 score,and mIoU for stem–leaf segmentation for the soybean dataset and 53%,62.8%,and 70.3%in the AP,AP@25,and AP@50 for leaf instance segmentation for the Pheno4D *** study provides an effective way for characterizing 3D plant architecture,which will become useful for plant breeders to enhance selection *** trained networks are available at https://***/jieyi-one/EFF-3DPSEG.

关键词： Deep Plant weakly

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

Genetic diversity and population structure of Pisum sativum accessions for marker-trait association of lipid content

引用

The Crop Journal 2015年第3期3卷 238-245页

作者： Sajjad Ahmad Simerjeet Kaur Neil Dylan Lamb-Palmer mark lefsrud Jaswinder Singh Department of Plant Science Mc Gill University Ste Anne de Bellevue Quebec H9X 3V9 Canada Department of Bioresource Engineering Mc Gill University Ste Anne de Bellevue Quebec H9X 3V9 Canada

Field pea(Pisum sativum L.) is an important protein-rich pulse crop produced globally. Increasing the lipid content of Pisum seeds through conventional and contemporary molecular breeding tools may bring added value to the crop. However, knowledge about genetic diversity and lipid content in field pea is limited. An understanding of genetic diversity and population structure in diverse germplasm is important and a prerequisite for genetic dissection of complex characteristics and marker-trait associations. Fifty polymorphic microsatellite markers detecting a total of 207 alleles were used to obtain information on genetic diversity, population structure and marker-trait associations. Cluster analysis was performed using UPGMA to construct a dendrogram from a pairwise similarity matrix. Pea genotypes were divided into five major clusters. A model-based population structure analysis divided the pea accessions into four groups. Percentage lipid content in 35 diverse pea accessions was used to find potential associations with the SSR markers. markers AD73, D21, and AA5 were significantly associated with lipid content using a mixed linear model(MLM) taking population structure(Q) and relative kinship(K) into account. The results of this preliminary study suggested that the population could be used for marker-trait association mapping studies.

关键词： Diversity Field Pea Lipid content marker-trait association Mixed linear model SSR

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

Effect of Pulsed Ultraviolet Light on the Total Phenol Content of Elderberry (<i>Sambucus nigra</i>) Fruit

引用

Food and Nutrition Sciences 2012年第6期3卷 774-783页

作者： Ramesh Murugesan Valérie Orsat mark lefsrud Department of Bioresource Engineering Faculty of Agricultural and Environmental Sciences Macdonald Campus McGill University Québec Canada.

The changes in total polyphenolics in elderberry (Sambucus nigra) following treatment with various doses of pulsed ultraviolet rays (UV) were investigated. Four pulsed UV durations (5, 10, 20, 30 seconds) at three energy dosages (4500, 6000, 11,000 J/m2/pulse) were considered for the research. All treated elderberry fruits were incubated for 24 h at room temperature (25℃) following treatment to ensure enough response duration for enhanced development of polyphenols by the berries. The highest increase in total phenolics around 50% was found with 11,000 J/m2/pulse for a 10 seconds treatment while nearly 40% increase in total phenolics was found at an energy dosage of 11,000 J/m2/pulse after 5 seconds exposure. Even though most of the treatments indicated an increase in total polyphenols, some treatment expressed a decrease in phenolics content when compared to untreated fruits.

关键词： Elderberry Antioxidant Polyphenols Pulsed Ultraviolet Light Abiotic

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：