检索结果-南通市图书馆

Next generation sequencing of Apis mellifera syriaca identifies genes for Varroa resistance and beneficial bee keeping traits

引用

Insect Science 2016年第4期23卷 579-590页

作者： Nizar Haddad Ahmed Mahmud Batainh Osama Suleiman Migdadi Deepti Saini venkatesh krishnamurthy Sriram Parameswaran Zaid Alhamuri Bee Research Department National Center for Agricultural Research and Extension P.O.Box 639-Baqa 19381 jordanian Bee Research Station National Center for Agricultural Research and Extension Irbid Jordan Research and Development Unit Genotypic Technology (P) Ltd. #259 Apurva 2nd Floor 4th Cross R.M. V. 2nd Stage 80 Feet Road Bangalore 560 094 India

Apis mellifera syriaca exhibits a high degree of tolerance to pests and pathogens including varroa mites. This native honey bee subspecies of Jordan expresses behavioral adaptations to high temperature and dry seasons typical of the region. However, persistent honey bee imports of commercial breeder lines are endangering local honey bee population. This study reports the use of next-generation sequencing （NGS） technology to study the A. m. syriaca genome and to identify genetic factors possibly contributing toward mite resistance and other favorable traits. We obtained a total of 46.2 million raw reads by applying the NGS to sequence A. m. syriaca and used extensive bioinformatics approach to identify several candidate genes for Varroa mite resistance, behavioral and immune responses char- acteristic for these bees. As a part of characterizing the functional regulation of molecular genetic pathway, we have mapped the pathway genes potentially involved using information from Drosophila melanogaster and present possible functional changes implicated in responses to Varroa destructor mite infestation toward this. We performed in-depth functional annotation methods to identify -600 candidates that are relevant, genes involved in pathways such as microbial recognition and phagocytosis, peptidoglycan recognition protein family, Gram negative binding protein family, phagocytosis receptors, serpins, Toll signaling pathway, Imd pathway, Tnf, JAK-STAT and MAPK pathway, heamatopioesis and cellular response pathways, antiviral, RNAi pathway, stress factors, etc. were selected. Finally, we have cataloged function-specific polymorphisms between A. mellifera and A. m. syriaca that could give better understanding of varroa mite resistance mechanisms and assist in breeding. We have identified immune related embryonic development （Cactus, Relish, dorsal, Ank2, baz）, Varroa hygiene （NorpA2, Zasp, LanA, gasp, impl3） and Varroa resistance （Pug, pcmt, elk, elf3-s10, Dscam2, Dhc64C, gro,

关键词： Apis mellifera syriaca breeding conservation next-generation sequencing(NGS) varroa mite resistance

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

Dry Sliding Wear Behavior of Aluminum 6063 Composites Reinforced with TiB<sub>2</sub>Particles

引用

Journal of Minerals and Materials Characterization and Engineering 2017年第2期5卷 74-89页

作者： K. krishnamurthy Mengistu Ashebre J. venkatesh B. Suresha School of Mechanical & Industrial Engineering Ethiopian Institute of Technology-Mekelle Mekelle University Mekelle Ethiopia Department of Automobile Engineering People's Education Society College of Engineering Mandya India Department of Mechanical Engineering The National Institute of Engineering Mysore India

The influence of titanium diboride (TiB2) loading on the dry sliding wear characteristics of aluminum 6063 matrix alloy-titanium diboride (Al/TiB2) composite materials has been assessed using a pin-on disc wear tester at different loads. The composites with 5 and 10 wt% of fine TiB2 particles were fabricated using stir casting technique. For comparison, as-cast of the base alloy were made under the same processing applied for Al/TiB2 composites. The hardness of the composite materials was measured using Brinell hardness tester. Scanning electron microscopy (SEM) was used to analyze the wear surfaces of samples. The results indicate that fine TiB2 particles markedly improved the wear performance of the aluminum 6063 matrix alloy. The coefficient of friction decreases with increase in the amount of TiB2, but this effect was more pronounced in dry sliding. Hardness of composites increased with increasing TiB2 loading. The wear rates increase with increase in load and dependent upon TiB2 loading in the base alloy. Among the composites tested, Al/TiB2 composites containing 10 wt% TiB2 exhibited superior wear resistance over the base alloy and 5 wt% Al/TiB2 composites. These observations were correlated in terms of the TiB2 loading in base alloy which resulted in the variations of the hardness.

关键词： TiB2 Reinforced Aluminum 6063 Hardness Sliding Wear Wear Rate Wear Resistance

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

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

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：