scholarly journals Performance of Putative Mutants and Genetic Parameters of Plectranthus amboinicus (L.) through Mutation Induction With Colchicine

2021 ◽  
Vol 5 (2) ◽  
pp. 89-99
Author(s):  
Kunto Wibisono ◽  
Syarifah Iis Aisyah ◽  
Waras Nurcholis ◽  
Sri Suhesti
Keyword(s):  
Genetic Diversity ◽  
Genetic Parameters ◽  
Leaf Length ◽  
Genetic Enhancement ◽  
Mutation Induction ◽  
High Genetic Diversity ◽  
Induced Mutation ◽  
Qualitative Characters ◽  
Plectranthus Amboinicus

Genetic enhancement in vegetatively propagated crops can be done through mutation induction. Colchicine-induced mutation is one of the methods that can be employed to increase plant genetic diversity. This study aimed to determine the effect of colchicine on the performance and genetic parameters of MV3 generation of Plectranthus amboinicus (L.). This study was conducted at the Laboratory of Agricultural Seed Management, Plantation Research and Development Center, from June 2018 to June 2019. Nodes and shoots were used as explants. Mutation induction was performed using colchicine at concentrations of 0%, 0.02%, 0.04%, and 0.06%. Explant regeneration and subculture were done on MS0 medium. The number of plantlets yielded were 59 (0% concentration of colchicine), 60 (0.02%), 81 (0.04%), and 80 plantlets (0.06%), respectively. Results indicated that colchicine-induced mutation in an in vitro culture was able to generate high genetic diversity in both quantitative and qualitative characters of the plantlets. At the concentration of 0.04%, colchicine produced the highest frequency of putative mutants (28.4%). Genetic parameters in MV3 generation of P. amboinicus plantlets showed that five quantitative characters, i.e. plantlet height, number of leaves, number of shoots, leaf length, and number of roots had high heritability values at a concentration around the LC50 value (0.0275%).

scholarly journals Morphological, Pomological, and Specific Molecular Marker Resources for Genetic Diversity Analyses in Fig (Ficus carica L.)

HortScience ◽  
2019 ◽  
Vol 54 (8) ◽  
pp. 1299-1309 ◽  
Author(s):  
Nader R. Abdelsalam ◽  
Rehab M. Awad ◽  
Hayssam M. Ali ◽  
Mohamed Z.M. Salem ◽  
Kamal F. Abdellatif ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Expressed Sequence Tag ◽  
Fruit Trees ◽  
Molecular Data ◽  
Leaf Length ◽  
Ficus Carica ◽  
Full Potential ◽  
High Genetic Diversity ◽  
The North ◽  
Young Leaves

Fig (Ficus carica L.) considers the original cultivated fruit trees and currently has become extinct. Such genetic resources should be identified, documented, and conserved. Morphology, pomology, and molecular markers are successful tools in assessing genetic diversity and classifying fig accessions. Twenty-one cultivated fig (F. carica L.) accessions were collected from Egypt and Libya. In Egypt, fig accessions are dispersed from Sinai in the east to El-Saloom in the west and from Alexandria in the north to Aswan in the south, whereas Libyan accessions were collected from Tubryq, Bengazi, and AlKufrah. Seventeen morphological, pomological, and fruit traits were used to characterize the fig accessions. Moreover, frozen young leaves were used to extract genomic DNA; 13 expressed sequence tag (EST) common fig primer pairs with 12 intersimple sequence repeat (ISSR)-anchored primers were used to detect the genetic diversity. Analysis of variance for fig accessions showed highly significant differences concerning morphological traits, i.e., the leaf length (centimeters) and width (centimeters) ranged from 5.4 and 6 cm to 23 and 23.5 cm, for Komesrey-El-Hammam, Abodey-Giza, and Black_Mission accessions, respectively. Also, fig accessions showed different shapes of leaf edge and fruits; they were categorized into four groups: straight, waved, zigzag, and serrated. The number of leaf lobes data ranged from one lobe for the ‘Green-yellow’, ‘Sultani Red Siwa’, and ‘Sultany Red Amria’ accessions to 10 lobes in the Aswany accession. The two-way hierarchical morphological cluster analysis distributed fig accessions into two main groups. The results detected high genetic diversity for the fig accessions that could be useful in the future breeding programs. Concerning molecular data, the EST markers showed highly polymorphism and informative (r = 0.61; 90.0%), with a total number of identified alleles of 78. We proved that a relatively greater number of alleles per locus characterizes the targeted loci among fig accessions, for which only one and two alleles per locus have been revealed, respectively, although ISSR showed a clear pattern and bands of the primers UBC807, UBC811, UBC812, UBC814, UBC815, UBC817, UBC818, and UBC823. In conclusion, a great range of variability was detected within the fig accessions. This diversification could enrich the genetic base of this genus, and more experiments are needed to reach its full potential.

Conservation of Billbergia zebrina genetic resources: AFLP polymorphism of in vitro regenerated genotypes

2011 ◽  
Vol 10 (1) ◽  
pp. 20-23 ◽  
Author(s):  
Lirio L. Dal Vesco ◽  
Valdir M. Stefenon ◽  
Leocir J. Welter ◽  
Neusa Steiner ◽  
Miguel P. Guerra
Keyword(s):  
Genetic Diversity ◽  
Genetic Resources ◽  
Gene Diversity ◽  
Plant Genetic Resources ◽  
Natural Populations ◽  
Shannon Index ◽  
Aflp Markers ◽  
High Genetic Diversity ◽  
Index Of Diversity

Biotechnological techniques comprise useful tools for the conservation of endangered plant genetic resources. In the present work, polymorphism and usefulness of amplified fragment length polymorphism (AFLP) markers in assessing the genetic diversity in populations of Billbergia zebrina were investigated in nodular cultures and adult plants of the species. AFLP markers revealed moderate-to-high genetic diversity based on the estimations of Nei's gene diversity (mean He = 0.28), Shannon index of diversity (mean HS = 0.48) and the number of polymorphic fragments (mean of 56.17 polymorphic fragments over six primer pairs). In comparison to published studies of population genetics performed in other bromeliad species, the present study suggests that natural populations of B. zebrina likely maintain high levels of genetic diversity, an important feature towards conservation of plant genetic resources. The results obtained reveal that AFLP markers comprise a powerful tool in order to assess the levels of genetic diversity in natural populations of this endangered species. Integrating AFLP markers with in vitro propagation techniques is understood as an adequate strategy for conservation programmes of this species.

scholarly journals In vivo and in vitro models show unexpected degrees of virulence among Toxoplasma gondii type II and III isolates from sheep

2021 ◽  
Vol 52 (1) ◽  
Author(s):  
Mercedes Fernández-Escobar ◽  
Rafael Calero-Bernal ◽  
Javier Regidor-Cerrillo ◽  
Raquel Vallejo ◽  
Julio Benavides ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Toxoplasma Gondii ◽  
Small Ruminants ◽  
Parasite Burden ◽  
Target Cells ◽  
Post Inoculation ◽  
Type Ii ◽  
High Genetic Diversity

AbstractToxoplasma gondii is an important zoonotic agent with high genetic diversity, complex epidemiology, and variable clinical outcomes in animals and humans. In veterinary medicine, this apicomplexan parasite is considered one of the main infectious agents responsible for reproductive failure in small ruminants worldwide. The aim of this study was to phenotypically characterize 10 Spanish T. gondii isolates recently obtained from sheep in a normalized mouse model and in an ovine trophoblast cell line (AH-1) as infection target cells. The panel of isolates met selection criteria regarding such parameters as genetic diversity [types II (ToxoDB #1 and #3) and III (#2)], geographical location, and sample of origin (aborted foetal brain tissues or adult sheep myocardium). Evaluations of in vivo mortality, morbidity, parasite burden and histopathology were performed. Important variations between isolates were observed, although all isolates were classified as “nonvirulent” (< 30% cumulative mortality). The isolates TgShSp16 (#3) and TgShSp24 (#2) presented higher degrees of virulence. Significant differences were found in terms of in vitro invasion rates and tachyzoite yield at 72 h post-inoculation (hpi) between TgShSp1 and TgShSp24 isolates, which exhibited the lowest and highest rates, respectively. The study of the CS3, ROP18 and ROP5 loci allelic profiles revealed only type III alleles in ToxoDB #2 isolates and type II alleles in the #1 and #3 isolates included. We concluded that there are relevant intra- and inter-genotype virulence differences in Spanish T. gondii isolates, which could not be inferred by genetic characterization using currently described molecular markers.

scholarly journals Induksi Mutasi Kara Benguk (Mucuna pruriens L.) Menggunakan Iradiasi Sinar Gamma

2020 ◽  
Vol 22 (2) ◽  
pp. 105
Author(s):  
Siti Hartati Yusida Saragih ◽  
Khairul Rizal ◽  
Kamsia Dorliana Sitanggang
Keyword(s):  
Genetic Diversity ◽  
Gamma Ray ◽  
Lethal Dose ◽  
Mucuna Pruriens ◽  
Mutation Induction ◽  
High Genetic Diversity ◽  
Group Design ◽  
Planting Material ◽  
Gamma Ray Irradiation ◽  
Number Of Leaves

<p>Breeding kara benguk with mutation induction techniques using gamma ray radiation is expected to produce genetic diversity. The purpose of the study is to determine the value of Lethal Dose 50 (LD50) and obtain the genetic diversity of the kara benguk plant. The research was conducted at PAIR BATAN and Agrotechnology experiment, Universitas Labuhanbatu from May-July 2020. The planting material used was kara benguk seeds. The method used was Randomized Complete Group Design (RCGD) with one factor which was dose of irradiation with six levels (0, 200, 250, 300, 350 and 400 Gy) and three replications. Each replication consisted of 20 plants, so there are a total of 360 experimental plants. The results showed that the value of LD50 kara benguk in 3 weeks after planting was 281,472 Gy. Gamma ray irradiation increases the high genetic diversity of plants and the number of leaves at a dose of 350 Gy.</p>

scholarly journals Radiosensitivitas Kalus Embriogenik Kopi Robusta Bp 436 Terhadap Iradiasi Sinar Gamma

2019 ◽  
Vol 6 (1) ◽  
pp. 41
Author(s):  
Meynarti Sari Dewi Ibrahim ◽  
Enny Randriani ◽  
Laela Sari ◽  
Anne Nuraini
Keyword(s):  
Genetic Diversity ◽  
Somatic Embryos ◽  
Gamma Ray ◽  
Lethal Dose ◽  
Mutation Induction ◽  
High Genetic Diversity ◽  
Robusta Coffee ◽  
Randomized Design ◽  
Young Leaves ◽  
Gamma Ray Irradiation

<p><em>High genetic diversity is one factor that determines the success of plant breeding. Mutation induction by gamma ray irradiation is one method to improve plant genetic diversity. This study aimed to 1) obtain growth regulators composition suitable in inducing embryogenic callus, 2) determine the effect of gamma ray irradiation on the growth and development of somatic embryos, and 3) obtain lethal dose (LD) <sub>20</sub> and <sub>50</sub> values in Robusta coffee  BP 436. The study was conducted at the Tissue Culture Laboratory, Industrial and Beverage Crops Research Institute,  from May 2017 to December 2018. Explants used were young leaves of Robusta coffee BP 436. Callus induction used ½ MS media with 2,4-D (4.52 μM) and 2-iP (0.00; 4.93; 9.86; 14.79; and 19.72 μM) treatment. Mutation induction was performed using gamma radiation dosed at 0, 10, 20, 30, 40, and 50 Gy treatments. The regeneration media was ½ MS containing GA<sub>3</sub> (0 and 1 mg/l). The study used a complete randomized design with 10 replications. The results showed the best combination of plant growth regulator to induce the callus was 2.4-D 4.52 μM + 2-iP 19.72 μM. The fresh weight of cultures was inhibited above 30 Gy, whereas the number of somatic embryos decreased at doses above 10 Gy. Addition of GA<sub>3</sub> 1 mg/l in regeneration media increased the number of somatic embryos in torpedo phase, but not in gamma irradiation exposed calluses. The LD<sub>20</sub> and LD<sub>50</sub> of Robusta coffee BP 436 are 16.81 and 28.52 Gy, respectively.</em></p>

scholarly journals Keragaman Karakter Morfologi Plasma Nutfah Wijen (Sesamum indicum L.) ; Diversity of Morphological Characters of Sesame (Sesamum indicum L.) Germplasm

2016 ◽  
Vol 7 (2) ◽  
pp. 69
Author(s):  
Rully Dyah Purwati ◽  
Tantri Dyah Ayu Anggraini ◽  
Hadi Sudarmo
Keyword(s):  
Genetic Diversity ◽  
Germ Plasm ◽  
Coat Color ◽  
Cropping System ◽  
Morphological Characters ◽  
Sesamum Indicum ◽  
Leaf Length ◽  
Width Ratio ◽  
High Genetic Diversity ◽  
Color Clustering

<p>Usaha pengembangan wijen saat ini banyak diminati petani terutama untuk lahan-lahan sawah sesudah padi. Untuk itu diperlukan varietas wijen yang berumur genjah sehingga sesuai dengan pola tanam di lahan tersebut. Untuk merakit varietas diperlukan keragaman genetik yang dicerminkan oleh keragaman karakter morfologi, sehingga perlu dilakukan karakterisasi plasma nutfah. Penelitian ini bertujuan untuk mengumpulkan informasi karakter morfologi plasma nutfah wijen. Karakterisasi dilaksanakan di KP Karangploso, Malang yang terletak di ketinggian 515 m dpl. dengan curah hujan 1.500 mm/tahun, dan jenis tanah Gleymosol Gleik/Inceptisol, mulai bulan Maret sampai dengan Agustus 2012. Pada penelitian ini digunakan 35 aksesi. Penanaman wijen dilakukan pada 12 Maret 2012, masing-masing aksesi ditanam dalam satu baris pada petak berukuran 1 m x 5 m dengan jarak tanam 25 cm, satu tanaman per lubang. Hasil karakterisasi morfologi menunjukkan bahwa keragaman morfologi yang tinggi ditunjukkan oleh karakter kuantitatif yaitu panjang<br />petiol, lebar daun, rasio panjang : lebar daun, dan jumlah cabang dengan nilai masing-masing KK 27,49%;39,43%; 40,79%; dan 49,59%. Semua karakter kualitatif menunjukkan adanya keragaman morfologi kecuali tipe pertumbuhan, tanda ‘v’ pada korola bagian dalam, dan warna kapsul. Pengelompokan plasma nutfah menghasilkan keragaman yang tinggi; pada tingkat kemiripan 36,06% koleksi plasma nutfah wijen terbagi menjadi dua kelompok besar dan pada tingkat kemiripan 57,37% terbagi menjadi sembilan kelompok.</p><p> </p><p>Development of sesame is directed to rice field after rice has been harvested, and thus requires early ma-turing varieties which are suitable for cropping system in these areas. The genetic diversity of sesame germ-plasm is reflected by the diversity of agromorpho-logical characters, therefore collection of sesame germ-plasm have to be characterised. The objective of this research was to collect information of morphological characters of sesame germplasm. Characterization activities was held in Karangploso Experimental Station, <br />Malang which is laid on 515 above sea level, rainfall 1,500 mm/year, and soil type Gley-mocol Gleik/Incepticol, from March to August 2012. Sesame accessions were planted on 12 March 2012, each accession was planted in a row in 1 m x 5 m plot size, with 25 cm plant spacing, and one plant per hole. Fertilizer used was 45 kg N + 36 kg P 2O5 + 30 kg K2O. Characterization of quantitative morphological characters resulted in high diversity of pe-tiole length, leaf width, leaf length : width ratio, and number of branches characters, each character had CV value 27.49%; 39.43%; 40.79%; and 49.59%. Diversity was observed for all quali-tative morphological characters, except plant growth type, ‘v’ mark of inner side of corolla, and seed coat color. Clustering showed that sesame germplasm had high genetic diversity ; sesame germplasm is divided into two large groups on 36.06% similarity level, whereas based on 57.37% similarity, sesame germplasm is divided into nine groups.</p>

ATIVIDADE ANTIMICROBIANA IN VITRO DO EXTRATO AQUOSO, HIDROALCOÓLICO E ALCOÓLICO DE FOLHAS DE ESPÉCIES DA FAMÍLIA LAMIACEAE

2018 ◽  
Vol 4 ◽  
Author(s):  
Karlynne Freire Mendonça ◽  
José Klauber Roger Carneiro ◽  
Maria Auxiliadora Silva Oliveira
Keyword(s):  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Enterococcus Faecalis ◽  
Streptococcus Pyogenes ◽  
Mentha Arvensis ◽  
Ocimum Gratissimum ◽  
Mueller Hinton ◽  
Plectranthus Amboinicus

Objetivos: avaliar a atividade antimicrobiana em extrato aquoso, hidroalcoólico e alcoólico das folhas de espécies da família Lamiaceae frente a bactérias de interesse. Método: Foram escolhidas quatro espécies: Ocimum gratissimum, Plectranthus amboinicus, Mentha arvensis e Plectranthus barbatus. A partir das folhas foram confeccionados os extratos aquoso, hidroalcoólico e alcoólico nas concentrações 100mg/mL, 50mg/mL e 25mg/mL. Foram selecionadas as bactérias Streptococcus pyogenes, Enterococcus faecalis, Staphylococcus aureus e Pseudomonas aeruginosa para os ensaios de antibiose em Ágar Mueller-Hinton. Resultados: P. barbatus, em seu extrato hidroalcoólico mostrou ativo nas três concentrações para bactéria S. aureus, e ainda foi ativo para P. aeruginosa, demonstrando no extrato alcoólico atividade frente as bactérias. Para M. arvensis e P. amboinicus, seus extratos hidroalcoólico e alcoólico apresentaram atividade para S. aureus. Conclusão: Sugere-se que as espécies em questão apresentem boa atividade antimicrobiana, sendo necessária a realização de mais estudos para melhor entender esse mecanismo.

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