scholarly journals Selection signatures in worldwide Sheep populations

2013 ◽  
Author(s):  
Maria-Ines Fariello ◽  
Bertrand Servin ◽  
Gwenola Tosser-Klopp ◽  
Rachelle Rupp ◽  
Carole Moreno ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
World Wide ◽  
Response To Selection ◽  
Selection Signatures ◽  
Domestic Species ◽  
The World ◽  
The Hierarchical Structure ◽  
Linkage Disequilibrium Information ◽  
Modern Breeding

The diversity of populations in domestic species offers great opportunities to study genome response to selection. The recently published Sheep HapMap dataset is a great example of characterization of the world wide genetic diversity in sheep. In this study, we re-analyzed the Sheep HapMap dataset to identify selection signatures in worldwide sheep populations. Compared to previous analyses, we made use of statistical methods that (i) take account of the hierarchical structure of sheep populations, (ii) make use of linkage disequilibrium information and (iii) focus specifically on either recent or older selection signatures. We show that this allows pinpointing several new selection signatures in the sheep genome and distinguishing those related to modern breeding objectives and to earlier post-domestication constraints. The newly identified regions, together with the ones previously identified, reveal the extensive genome response to selection on morphology, color and adaptation to new environments.

scholarly journals SEMANTIC DESCRIPTION FOR THE TAXONOMY OF THE GEOSPATIAL SERVICES

2015 ◽  
Vol 21 (3) ◽  
pp. 515-531 ◽  
Author(s):  
Hao Li ◽  
Yandong Wang ◽  
Penggen Cheng
Keyword(s):  
Information System ◽  
World Wide ◽  
Geospatial Data ◽  
Semantic Description ◽  
Matching Method ◽  
The World ◽  
The Hierarchical Structure ◽  
Description Framework ◽  
Geospatial Services ◽  
Readable Format

Abstract:With the advances in the World Wide Web and Geographic Information System, geospatial services have progressively developed to provide geospatial data and processing functions online. In order to efficiently discover and manage the large amount of geospatial services, these services are registered with semantic descriptions and categorized into classes according to certain taxonomies. Most taxonomies for geospatial services are only provided in the human readable format. The lack of semantic description for taxonomies limits the semantic-based discovery of geospatial services. The objectives of this paper are proposing an approach to semantically describe the taxonomy of geospatial services and using the semantic descriptions for taxonomy to improve the discovery of geospatial services. A semantic description framework is introduced for geospatial service taxonomy to describe not only the hierarchical structure of classes but also the definitions for all classes. The semantic description of taxonomy base on this framework is further used to simplify the semantic description and registration of geospatial services and enhance the semantic-based service matching method.

scholarly journals Robust Digital Watermarking Techniques for protecting copyright Applied to Digital Data: A Survey

2021 ◽  
Vol 12 (3) ◽  
pp. 3819-3825
Author(s):  
Lakshman Ji Et.al
Keyword(s):  
World Wide Web ◽  
Digital Watermarking ◽  
World Wide ◽  
Mixed Media ◽  
Digital Data ◽  
The World ◽  
Data Theft ◽  
Media Data ◽  
The Way

The colossal prominence of the World Wide Web in the mid 1990's shown the business capability of offering media assets through the computerized networks. Since business intrigues look to utilize the advanced organizations to offer computerized media revenue driven, they have a solid interest in ensuring their proprietorship rights. Since the danger of utilizing media data, advanced fabrications, and unapproved sharing (robbery) of  computerized content has expanded among content makers, merchants and clients. Today mixed media data theft alone has exposed all the enterprises to multi-billion income misfortunes. Customary advanced substance security methods, for example, encryption and scrambling, alone can't give satisfactory insurance of copyrighted substance, in light of the fact that these advances can't ensure computerized content whenever they are decoded. One approach to debilitate illicit duplication is to embed data known as watermark, into possibly weak information so that it is difficult to isolate the watermark from the information. Computerized watermarking is the way toward embedding’s an advanced sign or example inside a computerized picture, which gives proof of realness. This paper presents a study on different data concealing strategies and depicts characterization of advanced Watermarking procedures.

scholarly journals Characterization of quince (Cydonia oblonga Mill.) cultivars using SSR markers developed for apple

2009 ◽  
Vol 15 (4) ◽  
Author(s):  
J. Halász ◽  
V. Hoffman ◽  
Z. Szabó ◽  
J. Nyéki ◽  
T. Szabó ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Ssr Markers ◽  
Genetic Bottleneck ◽  
The Self ◽  
Cydonia Oblonga ◽  
Allele Number ◽  
The World ◽  
Ssr Loci ◽  
A Minor

Quince (Cydonia oblongaMill.) is a minor fruit crop, which is primarily used for marmalade, jam and sauce.Very few quince cultivars are known all over the world and in many cases similar names are used for presumably different cultivars. The aim of the present study was to evaluate and characterize the genetic diversity of 36 quince cultivars and selections with SSR markers. Seven out of 8 SSR markers designed from apple sequences could successfully yield amplification also in quince cultivars. Number of alleles per locus ranged from 2 to 3 alleles. These allele numbers are quite low when compared to apple. It is supposed to be the consequence of a genetic bottleneck. In spite of the low allele number per locus, the 36 quince cultivars formed 30 different genotypes. The ratio of homozygosity was low, which might be coupled with the self-(in)compatibility phenotype of quinces. SSR markers proved unable to differentiate putatively closely related cultivars (e.g. ‘Bereczki’ and ‘Bereczki bôtermő’). In general, the level of polymorphism among the tested quince genotypes was much restricted due to the low allele number detected. However, it must be considered that the number of analysed SSR loci is not enough high to estimate the overall heterozygosity of the quince genome. Further experiments are needed and the SSR markers proved to be a reliable and useful tool for such analyses.

Time for a paradigm shift in the use of plant genetic resources

Genome ◽  
2020 ◽  
Vol 63 (3) ◽  
pp. 189-194
Author(s):  
François Belzile ◽  
Amina Abed ◽  
Davoud Torkamaneh
Keyword(s):  
Genetic Diversity ◽  
Molecular Markers ◽  
Candidate Genes ◽  
Paradigm Shift ◽  
Large Scale ◽  
Plant Genetic Resources ◽  
Phenotypic Characterization ◽  
Novel Traits ◽  
The World

For all major crops, sizeable genebanks are maintained across the world and serve as repositories of genetic diversity and key sources of novel traits used in breeding. Although molecular markers have been used to characterize diversity in a broad sense, the most common approach to exploring these resources has been through phenotypic characterization of subsets of these large collections. With the advent of affordable large-scale genotyping technologies and the increasing body of candidate genes for traits of interest, we argue here that it is time for a paradigm shift in the way that we explore and exploit these considerable and highly useful resources. By combining dense genotypic information in and around candidate genes, it is possible to classify accessions based on their haplotype, something approximating the actual alleles at these genes of interest.

scholarly journals Development and Use of miRNA-derived SSR Markers to Study Genetic Diversity, Population Structure and Characterization of Genotypes for Heat Tolerance Breeding in Bread Wheat (Triticum aestivum L.)

2020 ◽  
Author(s):  
Sandhya Tyagi ◽  
Anuj Kumar ◽  
Tinku Gautam ◽  
Renu Pandey ◽  
Reyazul Rouf Mir
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Ssr Markers ◽  
Heat Tolerance ◽  
Triticum Aestivum L ◽  
Breeding Programs ◽  
Mirna Genes ◽  
Novel Mirna ◽  
The World

AbstractWheat is one of the most important cereal crop in the world. Heat stress is an important abiotic stress limiting wheat production and productivity in the world including south-east Asia. The importance of miRNAs in gene expression under various biotic and abiotic stresses is well documented. Molecular markers, especially SSR markers, plays an important role for the success in molecular plant breeding programs. The discovery of SSRs from non-coding regions has been a challenging task. Therefore, development of novel miRNA-based SSRs from the conserved portions of the genome will prove useful for the study of genetic diversity of heat-responsive miRNA-genes in wheat. In the present study, efforts are made to mine SSR markers from 96 members of heat-responsive miRNA-genes of wheat followed by their validation using 37 contrasting (heat tolerance/susceptible) wheat genotypes. Among a set of 13 miRNA-SSRs used,7 SSRs were found polymorphic. Among these polymorphic SSR markers, three found to be very informative SSRs (HT-169j, HT-160a and HT-160b) and could largely discriminate heat tolerant genotypes from the heat susceptible ones. Further analysis based on Polymorphism Information Content (PIC) revealed that miRNA genes were more diverse in susceptible genotypes compared to tolerant genotypes. Ours is the first report that the genic/miRNA markers could be successfully used to study wheat diversity, population structure and characterization of trait specific germplasm. The important and useful miRNA-based SSRs, therefore, would serve as best markers in the marker-assisted breeding programs aimed at enhancing heat tolerance of Indian wheat.

Conservation of cattle genetic resources: the role of breeds

2014 ◽  
Vol 153 (1) ◽  
pp. 152-162 ◽  
Author(s):  
M. FELIUS ◽  
B. THEUNISSEN ◽  
J. A. LENSTRA
Keyword(s):  
Genetic Diversity ◽  
Bos Taurus ◽  
Bos Indicus ◽  
Genetic Management ◽  
Domestic Species ◽  
Online Appendix ◽  
The World ◽  
History Of ◽  
Alphabetical List

SUMMARYFocusing on cattle (Bos taurus, Bos indicus), the present paper discusses the concept of the breed in the context of the dynamic history of livestock domestication. A breed categorization is proposed on the basis of how the breeds came into existence. The online Appendix (available at http://journals.cambridge.org/AGS) presents a survey of the cattle breeds of the world consisting of: (1) a list of breeds per country and then subdivided according to the proposed categories; (2) a list of breed names, including synonyms and translations, ordered according to a comprehensive breed classification; and (3) an alphabetical list of these names. The commonly accepted perceptions of breeds and how these are influenced by the nomenclature are described. Considering the history of breeds, it is argued that conservation of genetic diversity does not necessarily imply conservation of breeds. However, breeds are instrumental for the conservation of genetic diversity as independent genetic management units. These considerations may very well be extrapolated to other domestic species.

Rotational Characteristics of the Green Solar Corona: 1947-1991

1994 ◽  
Vol 144 ◽  
pp. 139-141 ◽  
Author(s):  
J. Rybák ◽  
V. Rušin ◽  
M. Rybanský
Keyword(s):  
Solar Corona ◽  
World Wide ◽  
Rotation Period ◽  
Original Data ◽  
Coronal Emission ◽  
Time Intervals ◽  
Data Set ◽  
The World ◽  
Coronal Emission Line ◽  
Homogeneous Data

AbstractFe XIV 530.3 nm coronal emission line observations have been used for the estimation of the green solar corona rotation. A homogeneous data set, created from measurements of the world-wide coronagraphic network, has been examined with a help of correlation analysis to reveal the averaged synodic rotation period as a function of latitude and time over the epoch from 1947 to 1991.The values of the synodic rotation period obtained for this epoch for the whole range of latitudes and a latitude band ±30° are 27.52±0.12 days and 26.95±0.21 days, resp. A differential rotation of green solar corona, with local period maxima around ±60° and minimum of the rotation period at the equator, was confirmed. No clear cyclic variation of the rotation has been found for examinated epoch but some monotonic trends for some time intervals are presented.A detailed investigation of the original data and their correlation functions has shown that an existence of sufficiently reliable tracers is not evident for the whole set of examinated data. This should be taken into account in future more precise estimations of the green corona rotation period.

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