scholarly journals Insights into the genetic diversity of the leopard seal (Hydrurga leptonyx), inferred from mitochondrial DNA analysis, at Danco Coast, Antarctic Peninsula

2021 ◽  
Vol 50 (SuplEsp) ◽  
pp. 227-238
Author(s):  
Laura Hernández ◽  
Dalia Barragán ◽  
Javier Negrete ◽  
Sebastián Poljak ◽  
Federico Riet ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Mitochondrial Dna ◽  
Antarctic Peninsula ◽  
Dna Analysis ◽  
Haplotype Diversity ◽  
Austral Summer ◽  
Leopard Seal ◽  
High Haplotype Diversity ◽  
Diversity Assessment ◽  
Hydrurga Leptonyx

The leopard seal (Hydrurga leptonyx) is a genetically low-studied species. In order to conduct the first genetic diversity assessment of this species in Danco Coast (Antarctic Peninsula), 423 bp of the mitochondrial DNA Control Region (mtDNA-CR) was sequenced from 13 blood samples collected in Primavera Base (62º15’S, 58º39’W) during the 2011-2012 austral summer. Our results showed high haplotype diversity (h = 0.99), with various divergent haplotypes. Our findings suggest that leopard seals in the Danco Coast could represent different phylogroups; however, including more genetic markers are needed to confirm this hypothesis.

GENETIC DIVERSITY OF BROILER CHICKEN BRANDS RAISED IN ARID AND SEMI-ARID ZONES OF NORTHERN NIGERIA USING MITOCHONDRIAL DNA

2021 ◽  
Vol 5 (2) ◽  
pp. 456-461
Author(s):  
A. Y. Abdullahi ◽  
M. Nasir ◽  
A. G. Khalee ◽  
R. M. Ashiru ◽  
H. M. Zango ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Mitochondrial Dna ◽  
Rural Areas ◽  
Dna Analysis ◽  
Haplotype Diversity ◽  
Climatic Conditions ◽  
Arid Zones ◽  
High Genetic Diversity ◽  
Hot Dry Season ◽  
Semi Arid

A sector of broiler production is growing very fast to meet the high demand of meat in Nigeria. However, high mortality rates among the broilers especially during the hot dry season in arid and semi-arid zones is worrisome. There is a need for molecular genetics study that could aid in management, conservation and sustainable exploitation of this species. To evaluate the genetic diversity of broilers raised in these regions, a total of forty-six broilers were randomly sampled from eight different brands (Agrited, Amo, Chi, Fol-hope, Obasanjo, Olam, Yammfy and Zatech) for mitochondrial DNA analysis. Four haplotypes were detected among all the samples used that belong to the four strains. The sequences of mitochondrial regions revealed high haplotype diversity (0.78600) and low nucleotide diversity (0.00286).  Lower genetic diversity observed may increase the chances of rapid disease infection and distribution during any disease outbreak. Introduction of new strains of broilers with high genetic diversity is highly recommended. Future study should be conducted on the performance of these strains during the extremely hot temperature period in arid and semi-arid zones of Nigeria. This is to provide reliable information for the sake of local broiler farmer’s benefit who invests largely on this sector. The study will also help the geneticists from these brands to develop a strain that could survive and perform excellently under severe climatic conditions of the rural areas of arid and semi-arid zones of Nigeria

Genetic Diversity of Ligidium Isopods in Hokkaido and Niigata, Northern Japan, Based on Mitochondrial DNA Analysis

2020 ◽  
Vol 37 (5) ◽  
pp. 1
Author(s):  
Wakana Harigai ◽  
Aya Saito ◽  
Hitoshi Suzuki ◽  
Masanobu Yamamoto
Keyword(s):  
Genetic Diversity ◽  
Mitochondrial Dna ◽  
Dna Analysis ◽  
Mitochondrial Dna Analysis ◽  
Northern Japan

scholarly journals VARIASI GENETIK TIGA POPULASI IKAN NILA ( Oreochromis niloticus ) BERDASARKAN POLIMORFISME mt-DNA

2016 ◽  
Vol 2 (1) ◽  
pp. 67
Author(s):  
Otong Zenal Arifin ◽  
Titin Kurniasih
Keyword(s):  
Genetic Diversity ◽  
Genetic Distance ◽  
Oreochromis Niloticus ◽  
Selective Breeding ◽  
Haplotype Diversity ◽  
Mt Dna ◽  
High Haplotype Diversity ◽  
Freshwater Aquaculture ◽  
Preliminary Information ◽  
Nile Tilapia Oreochromis Niloticus

Penelitian untuk mengevaluasi keragaman genetik tiga populasi ikan nila telah dilakukan di Balai Riset Perikanan Budidaya Air Tawar, Bogor. Penelitian ini bertujuan untuk mendapatkan informasi variasi genetik ikan nila populasi GET, GIFT, dan nila Danau Tempe sebagai informasi dasar bagi program seleksi karakter kuantitatif. Hasil menunjukkan bahwa ikan nila GET, GIFT, dan nila Danau Tempe memiliki keragaman genetik yang tinggi dengan nilai haplotype diversity berturut-turut sebesar 0,7579; 0,5895; dan 0,5333. Jarak genetik terdekat terdapat antara ikan nila GIFT dan nila Danau Tempe, sedangkan jarak genetik terjauh terdapat pada ikan nila GET dengan populasi Danau Tempe.Research on evaluating genetic diversity between three populations of nile tilapia ( Oreochromis niloticus ) was conducted at Research Institute for Freshwater Aquaculture, Bogor. This research aimed to obtain preliminary information related with the genetic diversity of GET, GIFT, and Tempe Lake tilapia, which will be used as basic information for the future selective breeding program. Result showed that GET, GIFT, and Tempe Lake tilapia have high haplotype diversity of 0.7579, 0.5895, and 0.5333 respectively. The closest genetic distance was found between GIFT and Tempe Lake tilapia, while the farthest genetic distance was observed between GET and the Tempe Lake population.

scholarly journals GENETIC DIFFERENTIATION OF THE KAMPAR RIVER'S GIANT FEATHERBACK (Chitala lopis BLEEKER 1851) BASE ON MITOCHONDRIAL DNA ANALYSIS

2017 ◽  
Vol 16 (2) ◽  
pp. 49 ◽  
Author(s):  
Arif Wibowo ◽  
Ridwan Affandi ◽  
Kadarwan Soewardi ◽  
Sudarto Sudarto
Keyword(s):  
Genetic Diversity ◽  
Mitochondrial Dna ◽  
Population Structure ◽  
Sequence Analysis ◽  
Nucleotide Sequence ◽  
Dna Analysis ◽  
Nucleotide Sequence Analysis ◽  
Mitochondrial Dna Control Region ◽  
Mitochondrial Dna Analysis ◽  
Important Fish

Although the giant featherback Chitala lopis is an important fish in Kampar River, the population structure has not been investigated. In this study, genetic diversity and population structure of giant featherback were examined using nucleotide sequence analysis of mitochondrial DNA control region for 54 fish collected from Kampar River.

scholarly journals Identification of Hucul mare families by mtDNA markers

2014 ◽  
pp. 75-79
Author(s):  
Nikolett Sziszkosz ◽  
Szilvia Kusza ◽  
András Jávor ◽  
Sándor Mihók
Keyword(s):  
Genetic Diversity ◽  
Mitochondrial Dna ◽  
Genetic Variability ◽  
Dna Sequence ◽  
Animal Species ◽  
Dna Analysis ◽  
Domestic Animals ◽  
Mitochondrial Dna Analysis ◽  
Important Challenge ◽  
Mtdna Markers

Hundred animal species have disappeared during the last century. By this time, approximately one-third of domestic animals have been in the endangered category. Hucul horses are also in this category; furthermore saving the genetic diversity beside the race preservation is an important challenge as well. The number of mares and stallions is only one of the expressive elements of genetic diversity; together with their quality determine the genetic variability of this breed. Beyond that, if an exact breed can originates from more founders, it can be more renewed genetically. Stud book documents these data by registering the mare families and stallions’ genealogical lineage. Molecular genetics, especially mitochondrial DNA analysis can make the precise identification of mare families possible. As a result of these molecular based methods, protection of genetic diversity, as well as breed preservation became more reliable. After the primer designing, the optimal primer pair was chosen which targets a 1092 bp length DNA sequence in the cytochrome b region. After the successful PCR optimalisation, we determined 170 Hucul mares’ sequences. According to our results, the samples compose ten haplotypes, which are much less, than the registered number of mare families in the stud book. Further investigations are needed to reach more representative results, and drawn the further consequences.

scholarly journals Indo-Pacific Phylogeography of the Lemon Sponge Leucetta chagosensis

Diversity ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 466
Author(s):  
Olivier Pasnin ◽  
Oliver Voigt ◽  
Gert Wörheide ◽  
Andrea P. Murillo Rincón ◽  
Sophie von der Heyden
Keyword(s):  
Genetic Diversity ◽  
Spatial Variation ◽  
Haplotype Diversity ◽  
Wide Distribution ◽  
Evolutionary Patterns ◽  
High Haplotype Diversity ◽  
Sponge Diversity ◽  
The Indian Ocean ◽  
Biogeographic Regions ◽  
First Time

The sponge Leucetta chagosensis Dendy (1913) has a wide distribution throughout the Indo-Pacific (IP) region, with previous studies focussing primarily on the western Pacific Ocean. To increase our knowledge of the spatial variation of genetic diversity throughout the IP, we constructed a phylogeny for L. chagosensis for the IP to assess the evolutionary patterns for this species. We generated 188 sequences of L. chagosensis and constructed maximum likelihood and Bayesian inference trees, using concatenated mitochondrial cytochrome oxidase subunit 3 gene (cox3) and nuclear ribosomal RNA gene (28S) markers for the first time. The spatial variation of genetic diversity of L. chagosensis was assessed using a phylogeographic approach. Leucetta chagosensis is composed of five cryptic lineages confined to different biogeographic regions with the specimens found in the Indian Ocean differing significantly from those found in the rest of the IP region. Genetic divergence was particularly high for the cox3 marker, with a low nucleotide diversity but high haplotype diversity for most lineages. This study highlights the need for a sustained effort in studying sponge diversity, boosted by the ongoing discovery of hidden biodiversity among this ecologically important taxon.

scholarly journals Summer circumpolar acoustic occurrence and call rates of Ross, Ommatophoca rossii, and leopard, Hydrurga leptonyx, seals in the Southern Ocean

Polar Biology ◽  
2021 ◽  
Vol 44 (2) ◽  
pp. 433-450
Author(s):  
Fannie W. Shabangu ◽  
Tracey L. Rogers
Keyword(s):  
Southern Ocean ◽  
Austral Summer ◽  
Call Rate ◽  
Leopard Seal ◽  
Survey Techniques ◽  
Pack Ice ◽  
Hydrurga Leptonyx ◽  
Spatio Temporal ◽  
The Antarctic ◽  
Temporal Overlap

Abstract Two of the Antarctic pack ice seals, Ross, Ommatophoca rossii, and leopard, Hydrurga leptonyx, seals, are extremely difficult to study via traditional visual survey techniques, yet are ideal for an acoustic survey as they are highly vociferous and produce an array of underwater sounds during the austral summer. To determine their acoustic occurrence in the Antarctic pack ice, we use their calls, detected within 680 acoustic recordings made between 1999 and 2009 as part of two multinational programmes. Siren calls of Ross seals were detected mainly in January, and 9.88 calls per minute from low siren calls was the highest call rate for this species. High numbers of Ross seal calls were detected close to the ice edge in areas between 0° and 20° E and 60° and 130° E, suggesting these are important summer habitats. Leopard seal calls were detected mainly in December and January, and December had the highest percentage of calls. Call rate of 11.93 calls per minute from low double trills was the highest call rate for leopard seals. Leopard seal calls were detected throughout the Southern Ocean with more calls detected throughout the pack ice. There was little spatio-temporal overlap in call occurrence of Ross and leopard seals, but both species were more vocally active during the day. Longitude and latitude were the most important predictors of Ross seal occurrence, and month of the year highly predicted leopard seal occurrence. This is the first study to examine the circumpolar acoustic occurrence of Ross and leopard seals in the Southern Ocean pack ice.

scholarly journals Genetic Diversity and Distribution ofBlastocystisSubtype 3 in Human Populations, with Special Reference to a Rural Population in Central Mexico

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Liliana Rojas-Velázquez ◽  
Patricia Morán ◽  
Angélica Serrano-Vázquez ◽  
Leonardo D. Fernández ◽  
Horacio Pérez-Juárez ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Human Population ◽  
Haplotype Diversity ◽  
Haplotype Network ◽  
Human Populations ◽  
High Haplotype Diversity ◽  
Genetic Diversity And Structure ◽  
High Prevalence ◽  
The World ◽  
Parasitic Protist

Blastocystissubtype 3 (ST3) is a parasitic protist found in the digestive tract of symptomatic and asymptomatic humans around the world. While this parasite exhibits a high prevalence in the human population, its true geographic distribution and global genetic diversity are still unknown. This gap in knowledge limits the understanding of the spread mechanisms, epidemiology, and impact that this parasite has on human populations. Herein, we provided new data on the geographical distribution and genetic diversity ofBlastocystisST3 from a rural human population in Mexico. To do so, we collected and targeted the SSU-rDNA region in fecal samples from this population and further compared its genetic diversity and structure with that previously observed in populations ofBlastocystisST3 from other regions of the planet. Our analyses reveled that diversity ofBlastocystisST3 showed a high haplotype diversity and genetic structure to the world level; however, they were low in the Morelos population. The haplotype network revealed a common widespread haplotype from which the others were generated recently. Finally, our results suggested a recent expansion of the diversity ofBlastocystisST3 worldwide.

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