Genetic diversity, structure and individual assignment of Casta Navarra cattle: a well-differentiated fighting bull population

2013 ◽  
Vol 131 (1) ◽  
pp. 11-18 ◽  
Author(s):  
A. Sanz ◽  
I. Martin-Burriel ◽  
C. Cons ◽  
M. Reta ◽  
A. Poblador ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Individual Assignment ◽  
Well Differentiated ◽  
Diversity Structure

scholarly journals Mitochondrial Genetic Diversity among Farmed Stocks of Oreochromis spp. (Perciformes, Cichlidae) in Madagascar

Diversity ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 281
Author(s):  
Nicolas Hubert ◽  
Elodie Pepey ◽  
Jean-Michel Mortillaro ◽  
Dirk Steinke ◽  
Diana Edithe Andria-Mananjara ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Low Income ◽  
Food System ◽  
Production Systems ◽  
Dna Barcode ◽  
Diversity Indices ◽  
Low Income Countries ◽  
Wild Populations ◽  
Fast Development ◽  
Well Differentiated

The fast development of aquaculture over the past decades has made it the main source of fish protein and led to its integration into the global food system. Mostly originating from inland production systems, aquaculture has emerged as strategy to decrease malnutrition in low-income countries. The Nile tilapia (Oreochromis niloticus) was introduced to Madagascar in the 1950s, and is now produced nationally at various scales. Aquaculture mostly relies on fry harvested from wild populations and grow-out in ponds for decades. It has recently been diversified by the introduction of several fast-growing strains. Little is known how local genetic diversity compares to recently introduced strains, although high and comparable levels of genetic diversity have previously been observed for both wild populations and local stocks. Our study compares DNA barcode genetic diversity among eight farms and several strains belonging to three species sampled. DNA-based lineage delimitation methods were applied and resulted in the detection of six well differentiated and highly divergent lineages. A comparison of DNA barcode records to sequences on the Barcode of Life Data System (BOLD) helped to trace the origin of several of them. Both haplotype and nucleotide diversity indices highlight high levels of mitochondrial genetic diversity, with several local strains displaying higher diversity than recently introduced strains. This allows for multiple options to maintain high levels of genetic diversity in broodstock and provides more options for selective breeding programs.

Identification and Analysis of Genetic Diversity Structure Within Pisum Genus Based on Microsatellite Markers

2009 ◽  
Vol 8 (3) ◽  
pp. 257-267 ◽  
Author(s):  
Xu-xiao ZONG ◽  
Rebecca Ford ◽  
Robert R Redden ◽  
Jian-ping GUAN ◽  
Shu-min WANG
Keyword(s):  
Genetic Diversity ◽  
Microsatellite Markers ◽  
Diversity Structure

Genetic Diversity Analysis among 27 Indian Goat Populations using Microsatellite Markers

2020 ◽  
Author(s):  
Rajkumar Sah ◽  
Santpal Dixit
Keyword(s):  
Genetic Diversity ◽  
Association Studies ◽  
Research Work ◽  
Diversity Analysis ◽  
National Bureau ◽  
Genetic Diversity Analysis ◽  
Well Differentiated ◽  
Inbreeding Level ◽  
High Level ◽  
Indian Goat

Background: Livestock genetic diversity studies focus on their within and diversity, breed history, adaptive variations, ancestral information, site of domestication and parentage testing and assess the genetic uniformity, admixture or subdivision, inbreeding, or introgression in the population which is helpful in breed formation and their sustainable utilization.Methods: The present research work was conducted during the year 2016-17 at National Bureau of Animal Genetics Resources, Karnal-132001. STR data of 25 markers on 1237 random samples of 27 goat populations was used for analysis. The genetic diversity analysis of new population viz: Narayanpatna, Raighar, Kalahandi, Malkangiri of Odisha state and Rohilkhandi (UK) and their association studies with other Indian goat breeds was performed.Result: It was found that used markers are highly polymorphic- and the studied breeds/population showed great diversity and distributed mostly on the basis of physio-geographical condition and type of production but among new populations diversity was least which might be due to exchange of animal for breeding purposes. The studied new goat populations were well differentiated from other goat breeds which might be due to physio-geographical condition and breeding practices, so these may be considered as separate breeds/populations. In conclusion, the results showed high level of conserved genetic diversity in the Indian goat breeds. The smaller and isolated new population showed less diversity and a higher inbreeding level as compared to registered breeds.

Genetic diversity, structure and marker-trait associations in a collection of Italian tomato (Solanum lycopersicum L.) landraces

2008 ◽  
Vol 116 (5) ◽  
pp. 657-669 ◽  
Author(s):  
Andrea Mazzucato ◽  
Roberto Papa ◽  
Elena Bitocchi ◽  
Pietro Mosconi ◽  
Laura Nanni ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Solanum Lycopersicum ◽  
Solanum Lycopersicum L ◽  
Diversity Structure ◽  
Trait Associations

scholarly journals Development of microsatellite markers for the Japanese endemic conifer Thuja standishii and transfer to other East Asian species

2019 ◽  
Author(s):  
James Raymond Peter Worth ◽  
K. S. Chang ◽  
Y.-H. Ha ◽  
Aili Qin
Keyword(s):  
Genetic Diversity ◽  
Microsatellite Markers ◽  
Microsatellite Loci ◽  
East Asian ◽  
Clonal Reproduction ◽  
Sister Species ◽  
Asian Species ◽  
Expected Heterozygosity ◽  
Polymorphic Microsatellite ◽  
Diversity Structure

Abstract Objective: Design polymorphic microsatellite loci that will be useful for studies of the genetic diversity, structure and reproduction in the Japanese endemic conifer Thuja standishii and test the transferability of these loci to the two other East Asian species, T. sutchuenensis and T. koraiensis . Results: Fifteen loci were developed which displayed 3 to 21 alleles per locus (average = 9.2) among 97 samples from three populations of T. standishii . Observed heterozygosity for all samples varied between 0.33-0.75 (average 0.54) while expected heterozygosity values were higher with an average over the 15 loci of 0.62 (0.37-0.91). Low multi-locus probability of identity values (< 0.00001) indicate that these markers will be effective for identifying individuals derived from clonal reproduction. All 15 loci amplified in 13 samples of T. sutchuenensis , the sister species of T. standishii , with 1 to 11 alleles per locus (average = 4.33) while 13 loci amplified in four samples of the more distantly related T. koraiensis with 1 to 5 alleles per locus (average = 2.15).

scholarly journals Portuguese Pinus nigra J.F. Arnold populations: genetic diversity, structure and relationships inferred by SSR markers

2020 ◽  
Vol 77 (3) ◽  
Author(s):  
Alexandra Dias ◽  
Guia Giovannelli ◽  
Bruno Fady ◽  
Ilaria Spanu ◽  
Giovanni G Vendramin ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Ssr Markers ◽  
Pinus Nigra ◽  
Diversity Structure

scholarly journals Genetic diversity and spatial genetic structure in populations of Orbignya phalerata Mart. under different exploitation intensities in the Brazilian savanna

2015 ◽  
Vol 64 (1-6) ◽  
pp. 201-211 ◽  
Author(s):  
Bruna Ibanes ◽  
A.M. Sebbenn ◽  
V.C.R. Azevedo ◽  
M.A. Moreno ◽  
F.B. Gandara ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Genetic Structure ◽  
Spatial Genetic Structure ◽  
Spatial Distance ◽  
Null Alleles ◽  
Fixation Index ◽  
Genetic Studies ◽  
Expected Heterozygosity ◽  
Adult Trees ◽  
Diversity Structure

Abstract Genetic studies in tropical tree species have found signs of decreased genetic diversity and increased levels of inbreeding and spatial genetic structure (SGS) in fragmented and exploited populations. The aim of this paper was to investigate genetic diversity, structure, and intrapopulation SGS using eight microsatellite loci for three Orbignya phalerata populations that have undergone different intensities of seed harvesting. From each population, we georeferenced and sampled 30 seedlings, 30 juveniles, and 30 adult trees. The total number of alleles over all loci (k), and observed (Ho) and expected heterozygosity (He) presented lower values for the population experiencing more intense fruit harvesting than less heavily exploited populations, suggesting that fruit harvesting may decrease genetic diversity. Null alleles were detected in practically all loci among seedlings, juveniles, and adults in all populations, indicating that the estimates of Ho, He, and fixation index (F) are biased. When corrected for null alleles (FNull), the fixation index decreased for all samples, resulting in significantly higher than zero results for seedlings of all populations, but not for juveniles and adults of all populations. The comparison of FNull values between cohorts in the most heavily exploited population (ESP) suggests that inbred individuals are eliminated between seedling and adult stages. Significant SGS was detected up to 60 m in all populations, which indicates short distance seed dispersal. Genetic differentiation (G’ST) between pairwise populations was related to spatial distance between populations, with the greatest difference between more distant populations.

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