scholarly journals Genetic relationships of pear germplasms using simple sequence repeat marker

2016 ◽  
Vol 43 (4) ◽  
pp. 466-472
Author(s):  
Jae An Chun ◽  
Kang Hee Cho ◽  
Se Hee Kim ◽  
Han-Chan Lee ◽  
In Myong Choi ◽  
...  
Keyword(s):  
Simple Sequence Repeat Marker ◽  
Simple Sequence Repeat ◽  
Genetic Relationships ◽  
Sequence Repeat ◽  
Simple Sequence

scholarly journals Study of Plant Genetic Variation through Molecular Markers: An Overview

2021 ◽  
pp. 464-473
Author(s):  
Zeina S. M. Al-Hadeithi ◽  
Saade Abdalkareem Jasim
Keyword(s):  
Molecular Markers ◽  
Simple Sequence Repeat Marker ◽  
Fragment Length ◽  
Simple Sequence Repeat ◽  
Plant Biotechnology ◽  
Molecular Techniques ◽  
Basic Material ◽  
Sequence Repeat ◽  
Simple Sequence

This article refers to viewing the role of molecular markers during analyzing the genome of plants and their importance in plant biotechnology. In recent years, we observed the role of molecular techniques in programs for improving plant breeding and preserving genetic resources has been observed, and molecular and biochemical indicators which represent basic material through determining the diversity between genotypes for indicators it is never affected by external surrounding conditions as always in the phenotype features. Molecular markers of DNA have been widely applied to answer a range of questions related to taxonomy, molecular evolution, population genetics, and genetic diversity, as well as monitoring trade in plants and food products , in addition to its having a role in studying gene expression , genetic mapping, and studies of species evolution providing fast and accurate results. In this work, the advantages and limitations of the molecular techniques applied in plant sciences such as: RAPD (Random Amplification Polymorphic DNA Marker); ISSR (Inter Simple Sequence Repeat Marker); SSR (Simple Sequence Repeat Marker); AFLP (Amplified Fragment Length Polymorphic Marker); RFLP (Restriction Fragment Length Polymorphism Marker); SNP (Single Nucleotide Polymorphism) and Real Time PCR.

Genetic diversity among silkworm (Bombyx mori L., Lep., Bombycidae) germplasms revealed by microsatellites

Genome ◽  
2005 ◽  
Vol 48 (5) ◽  
pp. 802-810 ◽  
Author(s):  
Muwang Li ◽  
Li Shen ◽  
Anying Xu ◽  
Xuexia Miao ◽  
Chengxiang Hou ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Bombyx Mori ◽  
Ssr Markers ◽  
Simple Sequence Repeat ◽  
Genetic Relationships ◽  
Group Method ◽  
Sequence Repeat ◽  
Bombyx Mori L ◽  
Simple Sequence ◽  
Silkworm Bombyx Mori

To determine genetic relationships among strains of silkworm, Bombyx mori L., 31 strains with different origins, number of generations per year, number of molts per generation, and morphological characters were studied using simple sequence repeat (SSR) markers. Twenty-six primer pairs flanking microsatellite sequences in the silkworm genome were assayed. All were polymorphic and unambiguously separated silkworm strains from each other. A total of 188 alleles were detected with a mean value of 7.2 alleles/locus (range 2–17). The average heterozygosity value for each SSR locus ranged from 0 to 0.60, and the highest one was 0.96 (Fl0516 in 4013). The mean polymorphism index content (PIC) was 0.66 (range 0.12–0.89). Unweighted pair group method with arithmetic means (UPGMA) cluster analysis of Nei's genetic distance grouped silkworm strains based on their origin. Seven major ecotypic silkworm groups were analyzed. Principal components analysis (PCA) for SSR data support their UPGMA clustering. The results indicated that SSR markers are an efficient tool for fingerprinting cultivars and conducting genetic-diversity studies in the silkworm.Key words: silkworm, Bombyx mori L., microsatellites, simple sequence repeat (SSR), genetic diversity.

Genetic relationships of boxwood (Buxus L.) accessions based on genic simple sequence repeat markers

2016 ◽  
Vol 64 (6) ◽  
pp. 1281-1293 ◽  
Author(s):  
Chandra S. Thammina ◽  
Richard T. Olsen ◽  
Matthew Kramer ◽  
Margaret R. Pooler
Keyword(s):  
Simple Sequence Repeat ◽  
Genetic Relationships ◽  
Sequence Repeat ◽  
Simple Sequence Repeat Markers ◽  
Simple Sequence

scholarly journals Comparative Analysis of Genetic Similarity between Perennial Ryegrass Genotypes Investigated With AFLPs, ISSRs, RAPDs and SSRs

2011 ◽  
Vol 42 (No. 3) ◽  
pp. 87-94 ◽  
Author(s):  
U.K. Posselt ◽  
P. Barre ◽  
G. Brazauskas ◽  
L.B. Turner
Keyword(s):  
Perennial Ryegrass ◽  
Simple Sequence Repeat ◽  
Fragment Length Polymorphism ◽  
Genetic Relationships ◽  
Random Amplified Polymorphic Dna ◽  
Correlation Coefficients ◽  
Inter Simple Sequence Repeat ◽  
Grass Species ◽  
Sequence Repeat ◽  
Simple Sequence

Perennial ryegrass (Lolium perenne L.) is the most important grass species used in temperate grassland agriculture. Our objective was to obtain an overview of the genetic relationships between 20 individual genotypes of perennial ryegrass of diverse origins, using amplified fragment length polymorphism (AFLP), inter-simple sequence repeat (ISSR), random amplified polymorphic DNA (RAPD) and two sets of simple sequence repeat (SSR) markers. All 20 individuals were uniquely fingerprinted by all four marker systems and comparisons were made on the basis of 85 markers each. Mean genetic similarities were estimated at 0.31, 0.43, 0.23 and 0.15 for AFLPs, ISSRs, RAPDs and SSRs, respectively. Cophenetic values resulted in good (AFLP and SSR-B = 0.88) to moderately good fits (ISSR = 0.76, RAPD = 0.70, and SSR-A = 0.79). Comparing the four marker systems to each other, AFLP and SSR-A were correlated best (r = 0.57). All other comparisons revealed rather low correlation coefficients in the Mantel Z test. With twice as many markers cophenetic values increased to a very good fit for AFLPs (0.90) and SSRs (0.92).      

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