scholarly journals Genetic diversity in different populations of sloths assessed by DNA fingerprinting

2002 ◽  
Vol 62 (3) ◽  
pp. 503-508 ◽  
Author(s):  
N. MORAES ◽  
J. S. MORGANTE ◽  
C. Y. MIYAKI
Keyword(s):  
Genetic Diversity ◽  
Genetic Variability ◽  
Dna Fingerprinting ◽  
Genetic Similarity ◽  
Similarity Indices ◽  
Different Populations ◽  
Related Individuals ◽  
Low Levels ◽  
Dna Profiles ◽  
Two Populations

In this study we analyzed a population of Bradypus torquatus with individuals originally distributed in different localities of Bahia, and two populations of B. variegatus with individuals from Bahia and São Paulo States. Using the DNA fingerprinting method, we assessed the genetic variability within and between populations. Analysis of the DNA profiles revealed genetic similarity indices ranging from 0.34 ± 0.07 to 0.87 ± 0.04. Similar low levels of genetic variability were found only in isolated mammalian populations or among related individuals. This study presents the first analyses of genetic diversity in sloth populations.

scholarly journals Genetic diversity of rice stem borer (Chilo suppressalis Walker) from Northern Iran and comparison with other countries

2016 ◽  
Vol 48 (3) ◽  
pp. 360 ◽  
Author(s):  
M. Shayanmehr ◽  
E. Yoosefi-Lafooraki
Keyword(s):  
Genetic Diversity ◽  
Stem Borer ◽  
Chilo Suppressalis ◽  
Mazandaran Province ◽  
Northern Iran ◽  
Low Genetic Diversity ◽  
High Gene ◽  
Major Pest ◽  
Different Populations ◽  
Low Levels

Rice striped stem borer, <em>Chilo suppressalis</em> Walker (Lepidoptera: Crambidae) is considered the major pest of rice in Iran. Because of the serious damage on rice in Northern Iran, the present study was conducted to investigate genetic diversity within populations of <em>C. suppressalis</em>, from Mazandaran using a template of cytochrome oxidase I gene, 750 bps, (<em>COI</em>). Later the haplotypes from Iran were compared with those found in other countries. According to the results of this study, there is very low genetic diversity (two haplotypes) among different populations of this pest in populations of Northern Iran. The genetic similarity and low levels of genetic diversity of these populations suggest that the pest colonization occurred relatively recently and there is high gene flow between these populations of the province. In addition, haplotypes of Mazandaran province are different with those found in other countries. The similarity of Iranian population (Simorgh) with one population from China indicated that China might be the origin of <em>C. suppresalis</em>.

scholarly journals Analysis of Genetic Diversity in three Kazakh Sheep using 12 Microsatellites

2018 ◽  
Vol 7 (4.38) ◽  
pp. 122
Author(s):  
Kairat Dossybayev ◽  
Aizhan Mussayeva ◽  
Bakytzhan Bekmanov ◽  
Beibit Kulataev
Keyword(s):  
Genetic Diversity ◽  
Genetic Variability ◽  
Mean Value ◽  
Fixation Index ◽  
Merino Sheep ◽  
Str Markers ◽  
Sheep Breeds ◽  
Str Loci ◽  
High Level ◽  
Two Populations

The genetic structure of three Kazakh sheep breeds was examined by using 12 microsatellite loci. A total of 144 alleles were detected from the 12 STR loci, with a mean value of 12.0. The highest allele diversity was found at the locus CSRD247 (16 alleles). PIC value showed that all studied STR markers are more informative and appropriate for genetic analysis of three Kazakh sheep populations. Beside of INRA006, all markers had high level of genetic variability. As Fixation index shows, the excess of the heterozygosity was observed only in loci MAF065. Obtained number of private alleles in Edilbai, Kazakh Arkhar Merino and Kazakh Fine-wool sheep were 25, 17 and 15 respectively. Genetic diversity was higher in Edilbai population than in other two populations. The genetic variability was lower in Kazakh Arkhar Merino sheep than in the Edilbai and Kazakh Fine-wool sheep breeds. The genetic distance was the largest between Edilbai and Kazakh Arkhar Merinos. Also, the moderate differentiation was observed between Edilbai and Kazakh Arkhar Merinos.   

scholarly journals Genetic Characterization of Cleveland Bay Horse Breed

Diversity ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 174 ◽  
Author(s):  
Khanshour ◽  
Hempsey ◽  
Juras ◽  
Cothran
Keyword(s):  
Genetic Diversity ◽  
Genetic Variability ◽  
Genetic Similarity ◽  
Genetic Resource ◽  
Genetic Characterization ◽  
Genetic Relationships ◽  
Similarity Measures ◽  
Horse Breed ◽  
The Usa

The Cleveland Bay (CB) is the United Kingdom’s oldest established horse breed. In this study we analyzed the genetic variability in CB horses and investigated its genetic relationships with other horse breeds. We examined the genetic variability among 90 CB horses sampled in the USA compared to a total of 3447 horses from 59 other breeds. Analysis of the genetic diversity and population structure was carried out using 15 microsatellite loci. We found that genetic diversity in CB horses was less than that for the majority of other tested breeds. The genetic similarity measures showed no direct relationship between the CB and Thoroughbred but suggested the Turkman horses (likely in the lineage of ancestors of the Thoroughbred) as a possible ancestor. Our findings reveal the genetic uniqueness of the CB breed and indicate its need to be preserved as a genetic resource.

scholarly journals Diversity of Kikuyu grass (Cenchrus clandestinus): A review

Respuestas ◽  
2019 ◽  
Vol 24 (2) ◽  
pp. 82-90
Author(s):  
Juliana Arango Gaviria ◽  
Julián Echeverri Zuluaga ◽  
Albeiro López Herrera
Keyword(s):  
Genetic Diversity ◽  
Genetic Variability ◽  
Agricultural Sector ◽  
Phenotypic Variability ◽  
Morphological Variability ◽  
Main Axis ◽  
Perennial Plant ◽  
Forage Species ◽  
Different Populations ◽  
Kikuyu Grass

Kikuyo is a perennial plant of rapid growth and high aggressiveness, which represents one of the most important resources for the development of the economy and for the support of specialized livestock in Colombia. It was introduced in the mid-30s, where it has spread thanks to its invasive nature; however, of the studies that have been carried out, few have focused on the genetic diversity and phenotypic variability within their populations, as well as the possible contributions that these can provide to sustainability in the agricultural sector. The objective of this revision is to explore previous information about some basic topics of this forage species and mainly about its diversity and genetic variability in different latitudes. A systematic search was made of scientific articles, indexed journals, books and documents that had as main axis information about basic grass topics and mainly about genetic variability and diversity. In other countries, several lines of Kikuyo grass have been registered, as well as some studies on genetic diversity that have been able to determine, in different populations, a large amount of genetic variation consistent with the wide morphological variability of pasture.

scholarly journals Evaluation of genetic diversity and DNA fingerprinting of 19 standard reference rice varieties using SSR markers

2020 ◽  
Vol 16 (4) ◽  
pp. 603-609
Author(s):  
Tran Long ◽  
Luu Minh Cuc ◽  
Nguyen Quang Sang ◽  
Pham Xuan Hoi
Keyword(s):  
Genetic Diversity ◽  
Dna Fingerprinting ◽  
Genetic Similarity ◽  
Similarity Coefficient ◽  
International Union ◽  
Rice Varieties ◽  
Reference Marker ◽  
High Uniformity ◽  
New Varieties ◽  
Group 2

Molecular markers are advanced-tools for identifying new varieties at DNA levels. According to the International Union for the Protection of New Varieties ofPlants,  new breeded varieties need to be tested for the Distinctness, Uniformity and Stability (DUS), before being recognized as the new ones. Traditional DUS criteria based on 62 - 65 morphological and biochemical characteristics, which evaluated on comparison of new varieties with 19 standard reference varieties for traits of interest.  Study on the genotypic polymorphism of 19 standard reference rice varieties provides genotypic information of these varieties for the evaluation of new rice varieties based on genotyping analysis.  The reference marker set (30 markers) was used to evaluate the genetic diversity and DNA fingerprinting of 19 standard reference rice varieties. The results showed the similarity coefficient of 19 varieties varied from 0.04 to 0.548. At the genetic similarity coefficient of 0.1, the 19 rice varieties divided into two main groups. Group one included 3 varieties: DH1, DH5, DH13. Group 2 included the remaining 16 varieties. Inside group two, phylogenetic tree divided into two main branches at the genetic similarity coefficient of 0.3. Branch 1 includes 5 varieties including DH2, DH6, DH10, DH11 and DH7. The 11 remaining varieties were in the branch 2. The most closely varieties were DH6 and DH10 with the genetic similarity coefficient of 0.548. This study shows that, the standard reference varieties have high uniformity and high genotypic polymorphism, could used for testing new varieties based on genotyping by DNA fingerprinting combining with phenotype.

scholarly journals Testing the breeding strategy of Hungarian Bronze turkey strains for maintaining genetic diversity with microsatellites

2011 ◽  
Vol 54 (4) ◽  
pp. 419-429
Author(s):  
S. Kusza ◽  
S. Mihók ◽  
L. Czeglédi ◽  
A. Jávor ◽  
M. Árnyasi
Keyword(s):  
Genetic Diversity ◽  
Genetic Variability ◽  
Mating System ◽  
Breeding Strategy ◽  
Shannon Index ◽  
Inbreeding Coefficient ◽  
Control Population ◽  
Conservation Strategies ◽  
The Mean ◽  
Two Populations

Abstract. The aim of the study was to provide information on the genetic variability of the Hungarian Bronze turkey gene reserve population and its difference from the Broad-breasted turkey, and offer guidance and proposals for its future conservation strategies. Altogether, 239 Hungarian Bronze turkeys from 10 strains and 13 Broad-breasted turkeys as a control population were genotyped for 15 microsatellites. All loci were polymorphic with the average number of alleles per locus 3.20±1.146 in the Hungarian Bronze turkey. The mean expected (Hexp) and observed heterozygosity (Hobs) were not different (0.392 and 0.376, respectively) in the overall population, and similar values were obtained for hens and bucks and among hen strains. Inbreeding coefficient (FIS) and Shannon index (I) indicated that there was low inbreeding within hens and bucks. Our results confirm that the genetic diversity in the Hungarian Bronze turkey population has been preserved by the rotational mating system. Differences between the Hungarian Bronze turkey and the Broad-breasted turkey populations were determined. Nei’s unbiased values clearly indicated that the two populations are highly genetically differentiated.

scholarly journals The Mediterranean fruit fly (Ceratitis capitata) in Iran: genetic diversity and comparison with other countries

2015 ◽  
Vol 47 (1) ◽  
pp. 20 ◽  
Author(s):  
M. Rajabiyan ◽  
M. Shayanmehr ◽  
M. Mohammadi Sharif
Keyword(s):  
Genetic Diversity ◽  
Fruit Fly ◽  
Mediterranean Fruit Fly ◽  
Mazandaran Province ◽  
Northern Iran ◽  
Important Pest ◽  
Different Populations ◽  
Low Levels ◽  
The Mediterranean ◽  
Iranian Populations

The Mediterranean fruit fly, <em>Ceratitis</em> <em>capitata</em> (Wiedemann) is an economically important pest on fruits all over the world. The origin of this fly is thought to be from Africa, but it has recently expanded its distribution in many geographic regions including Iran. Due to the wide spread of this pest in Iran and its serious damage to fruit on trees, including citrus orchards of northern Iran, the present study was conducted firstly to investigate genetic diversity within populations of <em>C. capitata</em> based on the sequences of three mitochondrial DNA (mtDNA) genes including cytochrome C oxidase I (<em>COI</em>), NAHD dehydrogenase subunits 4 and 5 (<em>ND4</em> and <em>ND5</em>) and secondly to compare the Iranian haplotypes with those found in other countries. Results of this study indicated low levels of genetic diversity (four, four and three haplotypes among different populations of this pest, respectively for the <em>COI</em>, <em>ND4</em> and <em>ND5</em> genes) in northern Iranian populations. The genetic similarity and very low levels of genetic diversity of northern Iranian populations suggest that the pest colonisation occurred relatively recently. In addition, haplotypes of Mazandaran province are similar to haplotypes of those countries that have recently been infected by this pest.

scholarly journals Implementation of a limited set of SSR markers for screening of genetic variability in Latvian and Swedish sour cherry (Prunus cerasus L.) genetic resources collections

2011 ◽  
Vol 65 (1-2) ◽  
pp. 21-28
Author(s):  
Gunārs Lācis ◽  
Isaak Rashal ◽  
Viktor Trajkovski
Keyword(s):  
Genetic Diversity ◽  
Genetic Variability ◽  
Genetic Resources ◽  
Ssr Markers ◽  
Genetic Similarity ◽  
Polymorphic Information Content ◽  
Sour Cherry ◽  
Prunus Cerasus ◽  
Discrimination Power ◽  
Ssr Loci

Implementation of a limited set of SSR markers for screening of genetic variability in Latvian and Swedish sour cherry (Prunus cerasusL.) genetic resources collectionsForty-one sour cherry (Prunus cerasusL.) accessions were evaluated using three SSR markers to characterise genetic diversity in the sour cherry genetic resource collections at the Latvia State Institute of Fruit-Growing (LIFG), Dobele, Latvia and the Division of Horticultural Genetics and Plant Breeding at Balsgård, Department of Crop Sciences, Swedish University of Agricultural Sciences (SLU-Balsgård), Sweden, and to test the usability and reliability of a small set of SSR markers for preliminary characterisation of sour cherry germplasm collections. The SSR loci were highly polymorphic with 7-14 alleles per locus. Heterozygosity and Polymorphic Information Content values ranged from 0.750 to 1.000 and 0.748-0.899, respectively, while discrimination power per locus varied from 0.716 to 0.965. Five to thirty genotypes were found in the sour cherry collections for the three tested SSR loci. The combined discrimination power of all loci was effectively 0.994 and 0.999 for the LIFG and SLU-Balsgård collections, respectively. The SSRs used were able to uniquely identify all accessions in the analysed genetic resources collections. The genotype data allowed estimation of genetic diversity and genetic characterisation of accessions in the collections. Genetic similarity analysis showed higher genetic similarity among the Baltic and Scandinavian sour cherry varieties, than between Baltic and Eastern European varieties.

scholarly journals An ISSR-based genetic diversity analysis of Malus sieversii in Tienshan Mountains in Xinjiang, China and Kyrgyzstan

2019 ◽  
pp. 40-48
Author(s):  
Meiling Yang ◽  
Shiyou Che ◽  
Hong Long ◽  
Guorong Yan ◽  
Weiwei Yu
Keyword(s):  
Genetic Diversity ◽  
Genetic Similarity ◽  
Inter Simple Sequence Repeat ◽  
Similarity Coefficient ◽  
Malus Sieversii ◽  
Long Time ◽  
Polymorphism Rate ◽  
Different Populations ◽  
Xinjiang Of China ◽  
Issr Primers

Malus sieversii constitute a valuable genetic resource in wild apple ecosystems. The aim of this study was to use inter-simple sequence repeat (ISSR) primers as an accessible tool to investigate the genetic diversity in Malus sieversii species. The experimental materials include 34 samples from Kyrgyzstan and Xinjiang of China. A total of 125 bands and 98 polymorphic bands were amplified using 47 ISSR primers. The polymorphism rate was 78.4%. The genetic similarity coefficient of Kyrgyzstan and Xinjiang of China population was 0.68; the genetic similarity coefficient of various populations in Xinjiang was 0.72~0.94. The samples in same population got into a category, but some samples in faraway geographic locations have cross clustering. Geographical isolation hindered the gene exchange of Malus sieversii in different populations for a long time, and Malus sieversii developed along the natural selection environment direction and generate genetic differentiation after that.

scholarly journals Analysis of the mitochondrial CYTB gene sequence in human populations of northeastern Bosnia

2019 ◽  
Vol 82 (3) ◽  
pp. 221-238
Author(s):  
Adisa Ahmic ◽  
Irma Mujkic ◽  
Anel Ismailovic ◽  
Emir Halilovic ◽  
Lejla Lasic ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Genetic Structure ◽  
Genetic Differentiation ◽  
Human Populations ◽  
Roma Population ◽  
Additional Information ◽  
Mitochondrial Cytochrome B ◽  
Different Populations ◽  
Two Populations ◽  
Maternal Gene

Abstract This study offers the first report on variation sequence of the mitochondrial cytochrome b (MT-CYTB) gene in populations from Bosnia (northeastern Bosnia). This study was designed on the analysis of the genetic diversity of two populations of different cultural-anthropological and genetic origin, Roma population and native/non-Roma population. The main aim of our study was to estimate the usefulness of the CYTB sequence in the analysis of genetic categorization of different populations and intergroup diversity, as well as to provide some additional information on haplogroup-associated polymorphisms within the CYTB region in defining haplogroup status. Estimation of the genetic diversity was done using intra and intergroup genetic indices. The population-specific polymorphisms have been found in both categories of the populations. The results of the analysis of genetic differentiation show significant pairwise Fst differences between the Romani and native populations. Also, registered significant genetic differentiation is illustrated on the level of genetic variation between subpopulations of the Roma and non-Roma origin. The important result in our study is the confirmation of the significance of the triad of polymorphisms T14783C-G15043A-G15301A, indicating the influence of Asian component of the maternal gene pool on the genetic structure of the studied population of the Roma. Our data show that the haplogroup polymorphisms exist in the CYTB region and can provide useful information on the haplogroups that were defined only by the control region of the mtDNA. The results of this study indicate the region of CYTB gene can be a benefit in providing some additional information in the analysis of genetic structure of human populations and can be additionally applied in population studies.

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