scholarly journals High genetic diversity and low differentiation in mud crab (Scylla paramamosain) along the southeastern coast of China revealed by microsatellite markers

2012 ◽  
Vol 215 (17) ◽  
pp. 3120-3125 ◽  
Author(s):  
H. Ma ◽  
H. Cui ◽  
C. Ma ◽  
L. Ma
Keyword(s):  
Genetic Diversity ◽  
Microsatellite Markers ◽  
Scylla Paramamosain ◽  
Mud Crab ◽  
High Genetic Diversity ◽  
Southeastern Coast

scholarly journals High Genetic Diversity but Absence of Population Structure in Local Chickens of Sri Lanka Inferred by Microsatellite Markers

2021 ◽  
Vol 12 ◽  
Author(s):  
Amali Malshani Samaraweera ◽  
Ranga Liyanage ◽  
Mohamed Nawaz Ibrahim ◽  
Ally Mwai Okeyo ◽  
Jianlin Han ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Sri Lanka ◽  
Microsatellite Markers ◽  
Allelic Diversity ◽  
Genetic Distances ◽  
Population Substructure ◽  
High Genetic Diversity ◽  
Naked Neck ◽  
Local Chicken ◽  
Local Chickens

Local chicken populations belonging to five villages in two geographically separated provinces of Sri Lanka were analyzed using 20 microsatellite markers to determine the genetic diversity of local chickens. Population genetic parameters were estimated separately for five populations based on geographic locations and for eight populations based on phenotypes, such as naked neck, long legged, crested or crown, frizzle feathered, Giriraj, commercial layer, crossbreds, and non-descript chicken. The analysis revealed that there was a high genetic diversity among local chickens with high number of unique alleles, mean number of alleles per locus (MNA), and total number of alleles per locus per population. A total of 185 microsatellite alleles were detected in 192 samples, indicating a high allelic diversity. The MNA ranged from 8.10 (non-descript village chicken) to 3.50 (Giriraj) among phenotypes and from 7.30 (Tabbowa) to 6.50 (Labunoruwa) among village populations. In phenotypic groups, positive inbreeding coefficient (FIS) values indicated the existence of population substructure with evidence of inbreeding. In commercial layers, a high expected heterozygosity He = 0.640 ± 0.042) and a negative FIS were observed. The positive FIS and high He estimates observed in village populations were due to the heterogeneity of samples, owing to free mating facilitated by communal feeding patterns. Highly admixed nature of phenotypes was explained as a result of rearing many phenotypes by households (58%) and interactions of chickens among neighboring households (53%). A weak substructure was evident due to the mating system, which disregarded the phenotypes. Based on genetic distances, crown chickens had the highest distance to other phenotypes, while the highest similarity was observed between non-descript village chickens and naked neck birds. The finding confirms the genetic wealth conserved within the populations as a result of the breeding system commonly practiced by chicken owners. Thus, the existing local chicken populations should be considered as a harbor of gene pool, which can be readily utilized in developing locally adapted and improved chicken breeds in the future.

scholarly journals Genetic Diversity and Structure of Latvian Tilia cordata Populations

2021 ◽  
Vol 75 (4) ◽  
pp. 261-267
Author(s):  
Dainis Edgars Ruņģis ◽  
Baiba Krivmane
Keyword(s):  
Genetic Diversity ◽  
Microsatellite Markers ◽  
Vegetative Reproduction ◽  
Growth Conditions ◽  
Climatic Conditions ◽  
Tilia Cordata ◽  
High Genetic Diversity ◽  
Genetic Diversity And Structure ◽  
Broadleaf Tree ◽  
Broadleaf Species

Abstract Changing climatic conditions are transforming the ecological and silvicultural roles of broadleaf tree species in northern Europe. Small-leaved lime (Tilia cordata Mill.) is distributed throughout most of Europe, and is a common broadleaf species in Latvia. This species can tolerate a broad range of environmental and ecological conditions, including temperature, water availability, and soil types. The aim of this study was to assess the genetic diversity and differentiation of Latvian T. cordata populations using nuclear microsatellite markers developed for Tilia platyphyllos. After testing of 15 microsatellite markers, Latvian T. cordata samples were genotyped at 14 micro-satellite loci. Latvian T. cordata populations had high genetic diversity, and were not overly isolated from each other, with moderate gene flow between populations. No highly differentiated populations were identified. Vegetative reproduction was identified in most analysed populations, and almost one-third of analysed individuals are of clonal origin. T. cordata has high timber production potential under the current climatic and growth conditions in Latvia, and therefore this species has potential for use in forestry, as well as playing a significant role in maintaining biodiversity and other ecosystem services.

Parentage assignment of the mud crab (Scylla paramamosain) based on microsatellite markers

2013 ◽  
Vol 49 ◽  
pp. 62-68 ◽  
Author(s):  
Qunqun Ma ◽  
Hongyu Ma ◽  
Jianhua Chen ◽  
Chunyan Ma ◽  
Nana Feng ◽  
...  
Keyword(s):  
Microsatellite Markers ◽  
Scylla Paramamosain ◽  
Parentage Assignment ◽  
Mud Crab

scholarly journals Molecular Assessment of Genetic Diversity among Egyptian Landraces of Wheat (Triticum aestivum L.) Using Microsatellite Markers

2020 ◽  
pp. 46-58 ◽  
Author(s):  
Ahmed Medhat Mohamed Al-Naggar ◽  
Mohamed Abd El-Maboud Abd El-Shafi ◽  
Mohamed Helmy El-Shal ◽  
Ali Hassan Anany
Keyword(s):  
Genetic Diversity ◽  
Triticum Aestivum ◽  
Microsatellite Markers ◽  
Ssr Markers ◽  
Triticum Aestivum L ◽  
Genetic Progress ◽  
High Genetic Diversity ◽  
Breeding Programs ◽  
High Polymorphism Information Content ◽  
Wheat Landraces

To increase the genetic progress in wheat (Triticum aestivum L.) yield, breeders search for germplasm of high genetic diversity, one of them is the landraces. The present study aimed at evaluating genetic diversity of 20 Egyptian wheat landraces and two cultivars using microsatellite markers (SSRs). Ten SSR markers amplified a total of 27 alleles in the set of 22 wheat accessions, of which 23 alleles (85.2%) were polymorphic. The majority of the markers showed high polymorphism information content (PIC) values (0.67-0.94), indicating the diverse nature of the wheat accessions and/or highly informative SSR markers used in this study. The genotyping data of the SSR markers were used to assess genetic variation in the wheat accessions by dendrogram. The highest genetic distance was found between G21 (Sakha 64; an Egyptian cultivar) and the landrace accession No. 9120 (G11). These two genotypes could be used as parents in a hybridization program followed by selection in the segregating generations, to identify some transgressive segregates of higher grain yield than both parents. The clustering assigned the wheat genotypes into four groups based on SSR markers. The results showed that the studied SSR markers, provided sufficient polymorphism and reproducible fingerprinting profiles for evaluating genetic diversity of wheat landraces. The analyzed wheat landraces showed a good level of genetic diversity at the molecular level. Molecular variation evaluated in this study of wheat landraces can be useful in traditional and molecular breeding programs.

scholarly journals Indigenous rice of Northeast India harbor rich genetic diversity as measured by SSR markers and Zn/Fe content

2019 ◽  
Author(s):  
Vanlalsanga No Surname ◽  
Sagolshem Priyokumar Singh ◽  
Yengkhom Tunginba Singh
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Microsatellite Markers ◽  
Oryza Sativa L ◽  
Northeast India ◽  
Rice Cultivars ◽  
High Genetic Diversity ◽  
Fe Content ◽  
Ne India ◽  
Improvement Programs

Abstract Background Rice (Oryza sativa L.) is one of the most important crops of the world and a major staple food for half of the World’s human population. The Northeastern (NE) region of India lies in the Indo-Burma biodiversity hotspot and about 45% of the total flora of the country is found in the region. Local rice cultivars from different states of NE India were analyzed for genetic diversity and population structure using microsatellite markers, and their zinc and iron content. Results A total of 149 bands were detected using twenty-two microsatellite markers comprising both random and trait-linked markers, showing 100% polymorphism and high value of expected heterozygosity (0.6311) and the polymorphism information content (0.5895). Nali Dhan cultivar of Arunachal Pradesh possessed the highest genetic diversity (0.3545) among studied populations while Moirangphou Khonganbi of Manipur exhibited the lowest genetic diversity (0.0343). The model-based population structure revealed that all the studied 65 rice cultivars were grouped into two clusters. Cluster I was represented by 36 cultivars and cluster II by 29 cultivars. Badalsali cultivar of Assam possessed the highest Zn content (75.8 μg/g) and Kapongla from Manipur possessed the lowest (17.98 μg/g). The highest and the lowest Fe content was found in Fazu (215.62 μg/g) and Idaw (11.42 μg/g) of Mizoram. Conclusion The result suggested rice cultivars of NE India possessing high genetic diversity (Nali Dhan), high Zn (Badalsali) and Fe (Fazu) content can be useful as a source of germplasm for future rice improvement programs.

scholarly journals Rice of Northeast India harbor rich genetic diversity as measured by SSR markers and Zn/Fe content

2019 ◽  
Author(s):  
Vanlalsanga No Surname ◽  
Sagolshem Priyokumar Singh ◽  
Yengkhom Tunginba Singh
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Microsatellite Markers ◽  
Oryza Sativa L ◽  
Northeast India ◽  
Rice Cultivars ◽  
High Genetic Diversity ◽  
Fe Content ◽  
Ne India ◽  
Improvement Programs

Abstract Background Rice (Oryza sativa L.) is one of the most important crops of the world and a major staple food for half of the World’s human population. The Northeastern (NE) region of India lies in the Indo-Burma biodiversity hotspot and about 45% of the total flora of the country is found in the region. Local rice cultivars from different states of NE India were analyzed for genetic diversity and population structure using microsatellite markers, and their zinc and iron content. Results A total of 149 bands were detected using twenty-two microsatellite markers comprising both random and trait-linked markers, showing 100% polymorphism and high value of expected heterozygosity (0.6311) and the polymorphism information content (0.5895). Nali Dhan cultivar of Arunachal Pradesh possessed the highest genetic diversity (0.3545) among studied populations while Moirangphou Khonganbi of Manipur exhibited the lowest genetic diversity (0.0343). The model-based population structure revealed that all the studied 65 rice cultivars were grouped into two clusters. Cluster I was represented by 36 cultivars and cluster II by 29 cultivars. Badalsali cultivar of Assam possessed the highest Zn content (75.8 μg/g) and Kapongla from Manipur possessed the lowest (17.98 μg/g). The highest and the lowest Fe content was found in Fazu (215.62 μg/g) and Idaw (11.42 μg/g) of Mizoram. Conclusion The result suggested rice cultivars of NE India possessing high genetic diversity (Nali Dhan), high Zn (Badalsali) and Fe (Fazu) content can be useful as a source of germplasm for future rice improvement programs.

Microsatellite markers suggest high genetic diversity in an urban population of Cooper’s hawks (Accipiter cooperii)

2016 ◽  
Vol 95 (S1) ◽  
pp. 19-24 ◽  
Author(s):  
FRANCISCO MORINHA ◽  
PEDRO SILVEIRA RAMOS ◽  
SÓNIA GOMES ◽  
ROBERT WILLIAM MANNAN ◽  
HENRIQUE GUEDES-PINTO ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Microsatellite Markers ◽  
Urban Population ◽  
High Genetic Diversity ◽  
Accipiter Cooperii ◽  
Cooper's Hawks

Microsatellite markers reveal promising genetic diversity and seed trait associations in common bean landraces (Phaseolus vulgarisL.) from Nicaragua

2012 ◽  
Vol 10 (2) ◽  
pp. 108-118 ◽  
Author(s):  
O. R. Jiménez ◽  
H. Korpelainen
Keyword(s):  
Genetic Diversity ◽  
Microsatellite Markers ◽  
Common Bean ◽  
Allelic Variation ◽  
Geographic Origin ◽  
Strong Relationship ◽  
Molecular Characteristics ◽  
High Genetic Diversity ◽  
Breeding Programmes ◽  
Trait Associations

Nicaragua is located in the Mesoamerican diversity centre for common beans (Phaseolus vulgarisL.). Yet, there is insufficient knowledge of the molecular characteristics of most common bean landraces in Nicaragua. The objectives of the present study were to investigate the genetic diversity of common bean landraces and to identify promising sources of genetic variation for breeding purposes. Two cultivars and 40 landraces never studied before were selected from a collection based on the geographic origin, seed coloration and information provided by farmers. Fourteen microsatellite markers distributed in different linkage groups were analysed. The study revealed that there is a high genetic diversity (mean 8.9 alleles per locus). The populations showed structuring into three groups where seed weight had a strong relationship with population clustering. At least 20% of the populations hold promising allelic variation and potential for good market acceptance that could be maximized in breeding programmes. Additionally, four markers revealed a high correlation with seed length, width and weight, suggesting that marker-assisted selection for these yield-determinant traits could be straightforward. Nonetheless, more marker–trait associations should be addressed in order to enforce this practice.

scholarly journals High genetic diversity and connectivity in Colossoma macropomum in the Amazon basin revealed by microsatellite markers

2017 ◽  
Vol 40 (1) ◽  
pp. 142-146 ◽  
Author(s):  
Paola Fazzi-Gomes ◽  
Sávio Guerreiro ◽  
Glauber David Almeida Palheta ◽  
Nuno Filipe Alves Correa de Melo ◽  
Sidney Santos ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Microsatellite Markers ◽  
Amazon Basin ◽  
High Genetic Diversity ◽  
Colossoma Macropomum
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