Genetic Diversity and Population Structure of Nutria (Myocastor coypus) in South Korea

The nutria (Myocastor coypus) is an invasive alien species that have had major adverse effects on biodiversity and the agricultural economy in wetland habitats. Since 2014, the Ministry of Environment in South Korea has been carrying out the Nutria Eradication Project, and we investigated nutria distribution and genetic diversity of nutria populations in South Korea. We estimated that 99.2% of nutria habitats are in the mid-lower Nakdong River regions. To further analyze the genetic diversity in eight major nutria populations, we performed a genetic analysis using microsatellite markers. Genetic diversity levels of the eight nutria populations in South Korea were relatively lower than those in other countries. The probability of migration direction among nutria populations was predicted from genetic distance analysis. Genetic structure analysis showed little difference among the nutria populations in South Korea. These results suggest that nutrias in South Korea originated from a single population. Our results provide important data for establishing management strategies for the successful eradication of nutria populations in South Korea, as well as in other countries with alien invasive species.

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Genetic Differentiation in Moroccan Opuntia ficus-indica Cultivars Using Simple Sequence Repeat (SSR) Markers

Notulae Scientia Biologicae ◽

10.15835/nsb839864 ◽

2016 ◽

Vol 8 (3) ◽

pp. 380-385 ◽

Cited By ~ 1

Author(s):

Aissam EL FINTI ◽

Driss TALIBI ◽

Mouhamed SIDKI ◽

Abdelhamid E. MOUSADIK

Keyword(s):

Genetic Diversity ◽

Genetic Differentiation ◽

Ssr Markers ◽

Opuntia Ficus Indica ◽

Distance Analysis ◽

Reference Collection ◽

Ssr Loci ◽

Set Up ◽

Genetic Distance Analysis ◽

Simple Sequence

Estimation of genetic parameters at SSR loci can be applied for assessing the differences between cultivars or populations, either for variety distinction or the management of genetic resources. In this study, 13 Opuntia ficus-indica cultivars were analyzed using 10 SSR markers selected for studying the genetic diversity among these chosen cultivars. Over the 10 SSR markers, a total of 45 reproducible bands were scored with an average of 4.5 alleles/locus, while the observed heterozygosity (Ho) values of amplified loci ranged from 0.15 (SSR1) to 0.92 (SSR2 and SSR 11). Genetic distance analysis of the 13 cultivars showed a large genetic differentiation (GST = 0.47) and high number of different groups. Most of the accessions were not found to be clustered according to their eco-geographical origin. In addition, each cultivar was characterized by its own multiallelic combination between loci. The results revealed the usefulness of SSR in understanding of genetic diversity in Moroccans Barbary fig cultivars, thus being helpful to set up rational decisions concerning the establishment of a national reference collection.

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GENETIC DISTANCE OF 47 ACCESSIONS OF OIL PALM (Elaeis guineensis Jacq.) GERMPLASM FROM CAMEROON BASED ON MORPHOLOGICAL CHARACTER

Jurnal Penelitian Kelapa Sawit ◽

10.22302/iopri.jur.jpks.v27i1.70 ◽

2019 ◽

Vol 27 (1) ◽

pp. 25-40

Author(s):

Sujadi Sujadi ◽

Tiara S Wandita ◽

Nanang Supena ◽

Yurna Yenni

Keyword(s):

Genetic Diversity ◽

Cluster Analysis ◽

Genetic Distance ◽

Palm Oil ◽

Oil Palm ◽

Alternative Energy ◽

Elaeis Guineensis ◽

Distance Analysis ◽

Elaeis Guineensis Jacq ◽

Genetic Distance Analysis

Oil palm (Elaeis guineensis Jacq.) is a plantation commodity that has an important role in various aspects of life in Indonesia, especially the domestic economy. This is supported by the increasing demand for world palm oil for food needs (edible oil), industrial (oleochemical), and alternative energy sources based on biodiesel. The development of the palm oil industry requires several efforts to achieve increased national productivity, one of which is the utilization of quality seeds supported by the availability of genetic resources (germplasm) that have a high level of genetic diversity. Efforts that can be made for the development of oil palm in Indonesia is through the characterization of oil palm intoduction from abroad. Considering this, further research on genetic distance analysis of palm oil accession introduced from Cameroon is based on morphological characters to produce parent elders that can produce heterosis properties. Research conducted at Seed Garden of Adolina PTPN IV and laboratory analysis of plant material of Palm Oil Research Center located on Jl. Brigjen Katamso No. 5, Medan, North Sumatera, which lasted from December 2017 to February 2018. Single observations were made on 47 accession palm oil from Cameroon planted on December 2010 and ten trees from PPKS 540 variety for compare. Data analysis used was a description of the plant to know the character of plant morphology as well as genetic distance analysis. Analysis of genetic distance using PCA analysis and cluster analysis. The results obtained are based on the results of PCA (Principal Component Analysis) reduce the observed character into six major components that have eigen value > 1 and able to explain the material diversity tested for 73.8%. Based on the cluster analysis obtained the genetic distance of 47 accessions of palm oil from Cameroon by 57%. It can be concluded that, when the genetic distance between accessions is further away, the larger the genetic variability between the observed characters. If the genetic diversity is wider the greater the chance for successful selection in increasing the desired gene frequency.

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Distribution, spread and habitat preferences of nutria (Myocastor coypus) invading the lower Nakdong River, South Korea

Biological Invasions ◽

10.1007/s10530-014-0809-8 ◽

2014 ◽

Vol 17 (5) ◽

pp. 1485-1496 ◽

Cited By ~ 17

Author(s):

Sungwon Hong ◽

Yuno Do ◽

Ji Yoon Kim ◽

Dong-Kyun Kim ◽

Gea-Jae Joo

Keyword(s):

South Korea ◽

Habitat Preferences ◽

Nakdong River ◽

Myocastor Coypus

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Development of microsatellite markers and the genetic diversity of Myocastor coypus introduced to South Korea

Journal of Veterinary Medical Science ◽

10.1292/jvms.18-0564 ◽

2019 ◽

Vol 81 (3) ◽

pp. 499-503

Author(s):

Dong-Young KIM ◽

Ho Young SUK ◽

Seul-Ki PARK ◽

Sun-Young KANG ◽

Seong-Hoon SEOK ◽

...

Keyword(s):

Genetic Diversity ◽

South Korea ◽

Microsatellite Markers ◽

Myocastor Coypus

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Molecular marker systems with special reference to the Silkworm Bombyx mori L.

International Journal of Bioassays ◽

10.21746/ijbio.2016.11.007 ◽

2016 ◽

Vol 5 (11) ◽

pp. 5025

Author(s):

Zafar Iqbal Buhroo ◽

Muzafar Ahmad Bhat*

Keyword(s):

Genetic Diversity ◽

Molecular Markers ◽

Extinction Risk ◽

Management Strategies ◽

Crop Breeding ◽

Single Population ◽

Pests And Diseases ◽

Diversity Studies ◽

Term Management

Study on genetic diversity is critical to success in any crop breeding and it provides information about the quantum of genetic divergence and serves a platform for specific breeding objectives. Genetic diversity is a particular concern because greater genetic uniformity in silkworm can increase vulnerability to pests and diseases. Hence maintenance of genetic diversity is a fundamental component in long term management strategies for genetic improvement of silkworm which is cultivated by millions of people around the worlds for its lustrous silk. In view of the present study, genetic diversity studies carried out in silkworm using divergent methods (Quantitative traits, biochemical and molecular markers) and present level of diversity, pertaining to the literature has been reviewed. Genetic diversity is the genetic variation within species, both among geographically separated populations and among individuals within a single population. Genetic diversity is an essential aspect in conservation biology because a fundamental concept of natural selection states that the rate of evolutionary change in a population is proportional to the amount of genetic diversity present in it. Decreasing genetic diversity increases the extinction risk of populations due to a decline in fitness. Therefore, both biochemical and molecular markers have recently been employed to estimate the extent of genetic diversity present among various types of silkworm strains such as mono-, bi and multivoltines present in China, Japan, Korea, India, and several other countries.

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Monitoring genetic diversity across Pinus tabuliformis seed orchard generations using SSR markers

Canadian Journal of Forest Research ◽

10.1139/cjfr-2020-0479 ◽

2021 ◽

Author(s):

Boning Yang ◽

Shihui Niu ◽

Yousry A. El-Kassaby ◽

Wei Li

Keyword(s):

Genetic Diversity ◽

Genetic Distance ◽

Ssr Markers ◽

Genetic Relationships ◽

Seed Orchard ◽

Seed Orchards ◽

Distance Analysis ◽

2Nd Generation ◽

Pinus Tabuliformis ◽

Genetic Distance Analysis

The maintenance of genetic diversity across seed orchard generations is an important management objective. Here, we used Pinus tabuliformis as a model to explore the extent of genetic diversity across the species’ breeding activities through their corresponding seed orchards generations. We utilized a large number of SSR markers selected from <i></i>Pinus tabuliformis<i></i> transcriptomic data, and then assessed the effect of marker number on genetic diversity and individuals’ genetic relationships across orchards’s generations. In total, we designed 125 simple sequence repeat (SSR) markers, from which 39 SSRs were polymorphic and used in the present study. The genetic diversity and genetic distance parameters tended to increase with thean increase ofin markerloci numbers and a stable trend was reached at 24 SSRs. The selected optimal 24 SSR markers were further used to assess the genetic diversity across seed orchards’s generations, and a decreasing trend was detected with the advancement of orchards’s generations. Genetic distance analysis indicated that individuals in the 2nd generation orchard was more closely related as compared to those of the 1st- and 1.5-generations. This study provided valuable information on the effect of selection and breeding on genetic diversity and highlighted its role for effective seed orchards management.

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Sedimentary Processes of Barrier-Lagoon System in the Nakdong River Estuary, Busan, South Korea

Journal of Coastal Research ◽

10.2112/si85-001.1 ◽

2018 ◽

Vol 85 ◽

pp. 1-5 ◽

Cited By ~ 3

Author(s):

Han Jun Woo ◽

Jun-Ho Lee ◽

Jeongwon Kang ◽

Jae Ung Choi

Keyword(s):

South Korea ◽

River Estuary ◽

Nakdong River ◽

Sedimentary Processes ◽

Lagoon System ◽

The Nakdong River

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Predicting Impacts of Climate Change on Northward Range Expansion of Invasive Weeds in South Korea

Plants ◽

10.3390/plants10081604 ◽

2021 ◽

Vol 10 (8) ◽

pp. 1604

Author(s):

Sun Hee Hong ◽

Yong Ho Lee ◽

Gaeun Lee ◽

Do-Hun Lee ◽

Pradeep Adhikari

Keyword(s):

Climate Change ◽

South Korea ◽

Habitat Suitability ◽

Management Strategies ◽

Southern Region ◽

Suitable Habitat ◽

Invasive Weeds ◽

Northern Regions ◽

Suitable Habitats ◽

Control And Management

Predicting the distribution of invasive weeds under climate change is important for the early identification of areas that are susceptible to invasion and for the adoption of the best preventive measures. Here, we predicted the habitat suitability of 16 invasive weeds in response to climate change and land cover changes in South Korea using a maximum entropy modeling approach. Based on the predictions of the model, climate change is likely to increase habitat suitability. Currently, the area of moderately suitable and highly suitable habitats is estimated to be 8877.46 km2, and 990.29 km2, respectively, and these areas are expected to increase up to 496.52% by 2050 and 1439.65% by 2070 under the representative concentration pathways 4.5 scenario across the country. Although habitat suitability was estimated to be highest in the southern regions (<36° latitude), the central and northern regions are also predicted to have substantial increases in suitable habitat areas. Our study revealed that climate change would exacerbate the threat of northward weed invasions by shifting the climatic barriers of invasive weeds from the southern region. Thus, it is essential to initiate control and management strategies in the southern region to prevent further invasions into new areas.

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Metagenomic analyses and genetic diversity of Tomato leaf curl Arusha virus affecting tomato plants in Kenya

Virology Journal ◽

10.1186/s12985-020-01466-z ◽

2021 ◽

Vol 18 (1) ◽

Author(s):

Edith Khamonya Avedi ◽

Adedapo Olutola Adediji ◽

Dora Chao Kilalo ◽

Florence Mmogi Olubayo ◽

Isaac Macharia ◽

...

Keyword(s):

Genetic Diversity ◽

Selection Pressure ◽

Management Strategies ◽

Purifying Selection ◽

Tomato Leaf ◽

Amino Acid Sequences ◽

Virus Population ◽

Tomato Production ◽

Tomato Leaf Curl ◽

Leaf Curl

Abstract Background Tomato production is threatened worldwide by the occurrence of begomoviruses which are associated with tomato leaf curl diseases. There is little information on the molecular properties of tomato begomoviruses in Kenya, hence we investigated the population and genetic diversity of begomoviruses associated with tomato leaf curl in Kenya. Methods Tomato leaf samples with virus-like symptoms were obtained from farmers’ field across the country in 2018 and Illumina sequencing undertaken to determine the genetic diversity of associated begomoviruses. Additionally, the occurrence of selection pressure and recombinant isolates within the population were also evaluated. Results Twelve complete begomovirus genomes were obtained from our samples with an average coverage of 99.9%. The sequences showed 95.7–99.7% identity among each other and 95.9–98.9% similarities with a Tomato leaf curl virus Arusha virus (ToLCArV) isolate from Tanzania. Analysis of amino acid sequences showed the highest identities in the regions coding for the coat protein gene (98.5–100%) within the isolates, and 97.1–100% identity with the C4 gene of ToLCArV. Phylogenetic algorithms clustered all Kenyan isolates in the same clades with ToLCArV, thus confirming the isolates to be a variant of the virus. There was no evidence of recombination within our isolates. Estimation of selection pressure within the virus population revealed the occurrence of negative or purifying selection in five out of the six coding regions of the sequences. Conclusions The begomovirus associated with tomato leaf curl diseases of tomato in Kenya is a variant of ToLCArV, possibly originating from Tanzania. There is low genetic diversity within the virus population and this information is useful in the development of appropriate management strategies for the disease in the country.

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