scholarly journals Microsatellites for coriander crop: A cross species amplification

2018 ◽  
Vol 33 (00) ◽  
Author(s):  
Sharda Choudhary

Development of microsatellites (Simple Sequence Repeats) is an expensive and time consuming process for new crop like coriander, but this can be easily achieved by transferring the microsatellite loci from the same family/genus/species which is a cost-effective approach for development of microsatellites in lesser studied crops like coriander. For cross-species investigation presently carrot and celery microsatellites are available on the public domain. We examined the transferability of hundred carrot (Daucuscarota) microsatellite loci to coriander (Coriandrum sativum L.). Thirty nine percent primer (39/100) amplified for coriander. Out of 39 microsatellites loci, 35 primers were monomorphic and specific to carrot primers, showing approximately the same size of microsatellites loci as reported for carrot. Four SSRs were polymorphic; seven primer pairs were non-specific which were deviating for band size from the source of microsatellites. These microsatellites markers should provide a powerful tool for coriander breeding and genetics.

2019 ◽  
pp. 289-293
Author(s):  
Svetlana Gorislavets ◽  
Vitalii Volodin ◽  
Gennadii Spotar ◽  
Valentina Risovannaya ◽  
Yakov Alekseev

Обязательными условиями успешного сохранения и использования различных сортов сельскохозяйственных культур является идентификация и контроль генетической изменчивости сортов, для изучения которой используются различные методы, в том числе методы молекулярно-генетического анализа. В связи с быстрым развитием селекции, ежегодно появляются десятки новых сортов винограда, требующих паспортизации. Молекулярные маркеры могут способствовать подбору родительских пар для скрещивания, повышению точности и ускорению селекционного процесса, так как идентификация исходного материала с использованием молекулярных маркеров и анализ результатов скрещивания могут быть выполнены в достаточно короткий период. К наиболее информативным молекулярным маркерам относятся микросателлитные маркеры, основанные на анализе простых повторяющихся повторов (simple sequence repeats, SSR). Анализ полиморфизма SSR локусов позволяет изучить генетическую изменчивость сельскохозяйственных культур на уровне генома. Цель нашего исследования - генотипирование, оценка аллельного разнообразия и ДНК-паспортизация ряда сортов винограда селекции Института «Магарач» на основе SSR анализа. Основной метод, использованный в работе, - полимеразная цепная реакция (ПЦР) и фрагментный анализ продуктов ПЦР на генетическом анализаторе ABI 3130. В результате фрагментного анализа были генотипированы 8 селекционных сортов Института «Магарач» по 9 ядерным микросателлитным локусам (nSSR). Размеры аллелей оценены с помощью программы Gene Mapper v. 4.0. Полиморфизм микросателлитных локусов и генетическое разнообразие рассчитано с использованием программы Popgene (v. 1.32). Сравнительный анализ nSSR профилей ДНК изученных сортов позволил установить, что все сорта имеют уникальные профили. Всего идентифицировано 69 аллелей, среднее число аллелей - 7,67 аллелей/локус. На основании размеров аллелей составлены индивидуальные молекулярно-генетические паспорта в соответствии с международными стандартами.Identification and control of genetic variation of different varieties of agricultural crops enter as prerequisites for their efficient conservation and use. Genetic variation is investigated by means of a wide set of methods, including those relying on molecular-genetic analysis. Every year, dozens of new breedings of grapevine come into being, and their passportization is necessary. Molecular markets can promote selection of parent pairs for crossing, improve efficiency of breeding and accelerate the process as enable both identification of the initial material and analysis of crossing results to be done in a sufficiently short period of time. The highest information value is associated with microsatellite markers consisting of simple sequence repeats (SSR). Analysis of polymorphism of SSR loci allows to investigate genetic variation of agricultural crops at the level of genome. The goals of the study were to conduct genotyping of a number of grape breedings developed by the Institute Magarach, to assess their allelic diversity and to achieve DNA passportization based on SSR analysis. Polymerase chain reaction (PCR) and fragment analysis of PCR products with the use of a genetic analizer ABI 3130 were the main methods the study relied upon. As a result of the aforesaid analysis, eight new breedings of the Institute were genotyped for nine nuclear microsatellite loci (nSSR). The sizes of alleles were assessed using Gene Mapper v. 4.0 software. Popgene (v. 1.32) software was used to calculate polymorphism of microsatellite loci and genetic diversity. A comparative nSSR-analysis of DNA-profiles of the study varieties indicated that all of them had unique profiles. A total of 69 alleles were identified, with 7.67 alleles per locus on an average. Based on the sizes of the alleles, individual molecular-genetic passports of the varieties were made, in accordance with international standards.


Author(s):  
M A Janowiecki ◽  
J W Austin ◽  
A L Szalanski ◽  
E L Vargo

Abstract In the eastern United States, there are nine species of subterranean termites in three genera: Reticulitermes (six species), Coptotermes (two species), and Prorhinotermes (one species). These species serve as important ecological players by decomposing cellulose material, and some are important structural pests. Many of these species are difficult to discriminate morphologically and require examining the reproductive or soldier castes, which can be difficult to collect. While some genetic tools have been developed for species identification, they are often expensive and time-consuming. To help facilitate identification, we developed a more cost-effective and rapid genetic method to identify Reticulitermes species by screening 10 PCR primers that amplified inter-simple sequence repeats (ISSRs) in other termite species. From these, one primer was amplified in all five focal Reticulitermes species and contained conserved, species-specific fragments. We further screened this identification method on samples of each species covering a diversity of mitochondrial DNA haplotypes and localities. This identification method utilizing ISSRs can be used to quickly identify five species of Reticulitermes subterranean termites in the eastern United States in a matter of hours, providing a useful technique for pest management as well as future ecological research.


2007 ◽  
Vol 4 (1) ◽  
pp. 39-46 ◽  
Author(s):  
Liu Li ◽  
Liu Chu-Wu

AbstractIn order to protect and develop valuable snappers (Lutjanus spp.), genetic diversity and molecular markers of five species (Lutjanus vitta, L. fulvus, L. fulviflamma, L. sebae and L. stellatus) were detected and analysed using random amplified polymorphic DNA (RAPD) and simple sequence repeats (SSR) techniques. The polymorphic loci ratio (P) (86.00–92.11%), the mean intraspecies genetic distances (D) (0.1775–0.3431) and the intraspecies genetic diversity indexes (Hi) (0.1022–0.1634) were calculated using the RAPD technique. The genetic diversities of L. fulviflamma and L. vitta were richest in terms of P, and D and Hi, respectively. The results of SSR showed that low effective numbers of alleles (1.7893–3.6591), medium average heterozygosities (0.332–0.676) and medium polymorphism information contents (PIC) (0.302–0.641) occurred in five species of snappers, indicating comparatively rich genetic diversity among these fish. Nine molecular markers in the products amplified by primers OPA8 and OPP10, and six molecular markers in 11 microsatellite loci were found to be useful as specific markers to identify five species of snappers. Two neighbour-joining (NJ) dendrograms based on the results of RAPD and SSR suggested that L. stellatus and L. sebae are closely related and clustered in one branch, with L. vitta, L. fulviflamma and L. fulvus in the other.


Genome ◽  
1992 ◽  
Vol 35 (4) ◽  
pp. 659-666 ◽  
Author(s):  
Walther Traut ◽  
Jörg T. Epplen ◽  
Dieter Weichenhan ◽  
Jürgen Rohwedel

We established homogeneous sublines that contained two or three homozygous DNA loci with long (GATA)n tracts from polymorphic Ephestia laboratory strains. Crossbreeding analysis assigned these loci to two or three different chromosomes, respectively. A nonrelated and rather recently isolated strain contained at least three other poly(GATA) loci located on different chromosomes. Germline mutations, visible as restriction fragment size changes between parents and offspring or loss of a poly(GATA) tract, are relatively rare in some strains but unusually frequent in the ml strain. The mutations affect not only GATA repeats but also flanking sequences. In five mutations investigated by crossbreeding, the altered poly(GATA)-containing restriction fragments remained in their original linkage groups.Key words: Bkm DNA, microsatellite, simple sequence repeats.


1996 ◽  
Vol 1 (7) ◽  
pp. 215-222 ◽  
Author(s):  
W POWELL ◽  
G MACHRAY ◽  
J PROVAN

2019 ◽  
Vol 118 (6) ◽  
pp. 90-93
Author(s):  
L. Terina Grazy ◽  
Dr.G. Parimalarani

E-commerce is a part of Internet Marketing. The arrival of Internet made the world very simple and dynamic in all the areas. Internet is the growing business as a result most of the people are using it in their day to day life. E-commerce is attractive and efficient way for both buyers and sellesr as it reduce cost, time and energy for the buyer. No surprise the insurance sector has become quite active within the internet sphere. Most insurance companies are offering policies to be brought online and also the portals for paying premiums. It actually saves from hassles involved in going to an insurance office and spend hours to get the insurance work done. Insurance has become an important and crucial aspect of life. Online insurance is the best and most cost effective approach of taking the insurance deal. This paper focused on influence of online marketing on the insurance industry in India, usage of internet in India , the internet penetration in India and the online sale of insurance product by the insurance sector.


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