Genetic and morphological variability in populations of the wild diploid potato species Solanum maglia and Solanum kurtzianum from Argentina

Botany ◽  
2011 ◽  
Vol 89 (1) ◽  
pp. 55-64 ◽  
Author(s):  
Carlos F. Marfil ◽  
Natalia B. Pigni ◽  
Elsa L. Camadro ◽  
Ricardo W. Masuelli
Keyword(s):  
Morphological Variability ◽  
Morphological Characters ◽  
Wild Potato Species ◽  
Potato Species ◽  
Electrophoretic Patterns ◽  
Taxonomic Concept ◽  
Solanum Kurtzianum ◽  
Solanum Maglia

Solanum maglia Schltdl., a wild potato species that has its widest geographical distribution in Chile, is restricted in Argentina to Quebrada La Cumbre (quebrada = gorge), Mendoza province, where no other potato species has been reported. During two collecting expeditions carried out in 2006 and 2007 in this gorge, tubers of two potato populations separated by 500 m (area 1 and 2) were sampled. The morphological and genetic diversity of these two newly sampled populations and of five accessions from the same gorge classified as S. maglia, a plant of Solanum kurtzianum collected outside this gorge, and a Chilean plant of S. maglia were examined by comparing 24 morphological characters and electrophoretic patterns for simple sequence repeat and amplified fragment length polymorphism markers, respectively. Based on the current taxonomic concept, the results support the classification of plants from area 1 as S. kurtzianum and those from area 2 as S. maglia, except for one plant from the former area, which shared electrophoretic bands from both species. This is the first report on the sympatry of populations of the two species in Quebrada La Cumbre. The importance of performing in situ population studies in the same sites over years is discussed.

scholarly journals Relationships among Morphological Characters, Isozymes Polymorphism and DNA Variability – the Impact on Lactuca Germplasm Taxonomy

2011 ◽  
Vol 39 (No. 2) ◽  
pp. 59-67 ◽  
Author(s):  
I. Doležalová ◽  
A. Lebeda ◽  
M. Dziechciarková ◽  
E. Křístková ◽  
D. Astley ◽  
...  
Keyword(s):  
Dna Content ◽  
Fragment Length Polymorphism ◽  
Morphological Variability ◽  
Morphological Characters ◽  
Aflp Analysis ◽  
Dapi Staining ◽  
Lactuca Species ◽  
Relative Dna Content ◽  
The Impact

Fifty one accessions of nineteen Lactuca species, the hybrid L. serriola × L. sativa and the related species Mycelis muralis were evaluated for morphological variability, esterase (EST) polymorphism, Amplified Fragment Length Polymorphism (AFLP) and relative DNA content. Sixteen Lactuca accessions were classified taxonomically on the basis of morphology, isozyme analysis and AFLP. Twenty-eight bands (isoforms) of EST were recorded allowing 82% of accessions to be distinguished. The relative DNA content, measured using flow-cytometry (DAPI staining), ranged from 2.02 pg in L. capensis to 17.96 pg in L. canadensis. The results from AFLP analysis and the relative DNA content measurement corresponded well with recent taxonomic classification of the genus Lactuca.  

scholarly journals Taxonomic problems in the subgenus Meloehelea Wirth of the genus Atrichopogon Kieffer (Diptera: Ceratopogonidae) inferred from both morphological and molecular characters

2008 ◽  
Vol 19 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Andrea Tóthová ◽  
Jan Knoz ◽  
Radim Sonnek ◽  
Josef Bryja ◽  
Jaromír Vaňhara
Keyword(s):  
Morphological Variability ◽  
Intraspecific Variability ◽  
Taxonomic Revision ◽  
Morphological Characters ◽  
Valid Species ◽  
European Species ◽  
Rdna Sequences ◽  
16S Rdna Sequences ◽  
Molecular Characters

The classification of Meloehelea (Ceratopogonidae) species is based on morphological characters. The taxonomic revision of generally well-known species recovered interesting facts on possible geographic intraspecific variability or on the presence of an additional valid species. In this study, 5 European species and 2 species from the U.S.A. and Canada have been compared based on their morphological characters. Subsequently, the 16S rDNA sequences analyses of well known European species have been performed to confirm the characters mentioned in the determination key ofthis subgenus. Although, this study was limited by the number of examined non-European specimens, it provides some interesting facts on the possible morphological variability of well-known species and also an initial phylogenetic backbone for the progressive reconstruction of infrageneric relationships within the genus Atrichopogon.

scholarly journals Analisis Keragaman Plasma Nutfah Durian di Provinsi Bengkulu Berdasarkan Karakter Morfologi

2018 ◽  
Vol 23 (1) ◽  
pp. 59 ◽  
Author(s):  
Miswarti Miswarti ◽  
W. E. Putra ◽  
Dedi Sugandi
Keyword(s):  
Morphological Variability ◽  
Morphological Characteristics ◽  
Morphological Characters ◽  
In Situ Observation ◽  
Tropical Fruit ◽  
Relationship Analysis ◽  
Fruit Species ◽  
Fruiting Stage ◽  
Close Relationship

<p><strong>Abstract</strong></p><div>Durian is a tropical fruit species that grows in Indonesia, including in Kalimantan and Sumatra. Durian has a distinctive flavor and aromatic with diverse morphological characteristics. The research was conducted from March to August 2015 in Central Bengkulu district, Rejang Lebong, and Lebong (Bengkulu Province). The aims of this research were to determine the morphological variability and relationship among the durian accessions based on the morphological characteristics. The method used was exploration and in situ observation. Twenty nine of durian genotypes with fruiting stage were collected and observed according to the standard criteria. Relationship among the genotypes was analysed using NTSYSpc 2.1 software. Based on relationship analysis of the 35 morphological characters, four genotypes were grouped by similarity of 59&amp;ndash;84%. The genotype that had a very close relationship were genotypes #27 and #33. The best performance genotype was D10.</div><div> </div><div> </div><div><strong>Abstrak</strong></div><div> </div><div>Durian merupakan salah satu jenis tanaman buah tropis yang banyak tumbuh di Indonesia, seperti Kalimantan dan Sumatra. Durian mempunyai rasa dan aroma yang khas serta bentuk morfologi yang beragam. Penelitian ini dilaksanakan pada bulan Maret sampai dengan Agustus 2015 di Kabupaten Bengkulu Tengah, Rejang Lebong, dan Lebong (Provinsi Bengkulu). Tujuan penelitian ialah mengetahui tingkat keragaman dan potensi durian di Provinsi Bengkulu. Metode yang digunakan ialah jelajah dan observasi tanaman durian secara in situ. Sebanyak 29 genotipe tanaman durian yang telah berbuah digunakan sebagai sampel tanaman dan diamati sesuai kriteria standar yang telah ditetapkan. Analisis data kekerabatan dilakukan menggunakan program NTSyspc 2.1. Hasil analisis kekerabatan dari 35 karakter morfologis yang diamati (kualitatif dan kuantitatif) diperoleh kesimpulan (1) terdapat keragaman yang tinggi pada karakter tebal daging buah, kemerekahan kulit buah setelah panen, jumlah biji, kerapatan duri, bobot buah, bobot biji, dan bobot daging buah; (2) koefisien kemiripan sebesar 59&amp;ndash;84%. Genotipe yang mempunyai kekerabatan yang sangat dekat adalah genotipe 27 dan 33. Genotipe yang mempunyai penampilan terbaik ialah D10.</div><div><div> </div></div>

scholarly journals VARIABILITY AND INTRASPECIES CLASSIFICATION OF PUMKIN (Cucurbita moschata (Duch. ex Lam.) Duch. ex Poir.) BASED ON MORPHOLOGICAL CHARACTERS

2015 ◽  
Vol 2 (1) ◽  
pp. 286
Author(s):  
Purnomo _ ◽  
Budi Setiadi Daryono ◽  
Maulidya Beta Sentori
Keyword(s):  
Morphological Variability ◽  
Fruit Size ◽  
Morphological Characters ◽  
Fruit Shape ◽  
Morphological Similarity ◽  
Important Data ◽  
Fruit Flesh ◽  
Central Java ◽  
Cultivar Groups

<p>Pumpkin (C. moschata) is minor cultivated plant has morphological variability, that is. important data illustrate the genetic variability. Morphological variation data of of pumpkin can be used for intraspecies classification and conservation. The relationship of cultivar groups of pumpkin also as important data for pumpkin cultivation. The objectives of this study are to determine variability and intraspecies classification of pumpkin in Yogyakarta and around area based on morphological characters. Cultivar accession are collected from Yogyakarta, and Kopeng also Salatiga central Java as operational taxonomic units (OTU’s). Character scoring based on IPGRI of pumpkin with soft modification. Morphological similarity is calculated based on presence and absence characters, and cluster analysis is conducted by UPGMA method to create dendrogram to determine morphological variability and intraspecies classification of pumpkin based on morphological similarity. The result study shows, that there are 3 fruit shapes, namely giant, globular, and oblong with lobes or not. Pumpkin also has yellow and orange colors fruit flesh. The taste of fruit flesh are sweet or not. Based on Dendrogram pumpkin is classified into 3 group cultivars: lowland group with standard fruit shape, highland with standard fruit shape, and giant cultivar groups. Morphological variability of pumpkin in Yogyakarta and around areas indicate on fruit shape, fruit size, fruit color, and taste of fruit flesh, with morphological similarity coefficient 0,55-0,88.</p><p><br /><strong>Keywords</strong>: C. moschata, cultivar, morphological variability, intraspecies classification, phenetic relationship.</p>

Three new species, two new genera, and new family Biphragmosagittidae (Сhaetognatha) from Southwest Pacific Ocean

2011 ◽  
Vol 20 (1) ◽  
pp. 161-173
Author(s):  
A.P. Kassatkina
Keyword(s):  
New Species ◽  
Type Species ◽  
Morphological Characters ◽  
The Body ◽  
New Order ◽  
New Genera ◽  
New Family ◽  
The Family ◽  
Three New Species

Resuming published and own data, a revision of classification of Chaetognatha is presented. The family Sagittidae Claus & Grobben, 1905 is given a rank of subclass, Sagittiones, characterised, in particular, by the presence of two pairs of sac-like gelatinous structures or two pairs of fins. Besides the order Aphragmophora Tokioka, 1965, it contains the new order Biphragmosagittiformes ord. nov., which is a unique group of Chaetognatha with an unusual combination of morphological characters: the transverse muscles present in both the trunk and the tail sections of the body; the seminal vesicles simple, without internal complex compartments; the presence of two pairs of lateral fins. The only family assigned to the new order, Biphragmosagittidae fam. nov., contains two genera. Diagnoses of the two new genera, Biphragmosagitta gen. nov. (type species B. tarasovi sp. nov. and B. angusticephala sp. nov.) and Biphragmofastigata gen. nov. (type species B. fastigata sp. nov.), detailed descriptions and pictures of the three new species are presented.

Strategies of In Situ Generated Magnesium Catalysis in Asymmetric Reactions

Synlett ◽  
2021 ◽  
Author(s):  
Dongxu Yang ◽  
Linqing Wang
Keyword(s):  
Asymmetric Synthesis ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Asymmetric Reactions ◽  
Chiral Ligands ◽  
Alkaline Earth Metal ◽  
Enantioselective Reactions ◽  
Earth's Crust

AbstractMagnesium (Mg) is a cheap, non-toxic, and recyclable alkaline earth metal that constitutes about 2% weight in the Earth’s crust. The use of magnesium catalysts to forge chiral moieties in molecules is highly attractive. Based on our work in recent years, we describe the current progress in the development of in situ generated magnesium catalysts and their application in asymmetric synthesis. In this perspective, a critically concise classification of in situ generated magnesium catalytic modes, with relevant examples, is presented, and representative mechanisms of each category are discussed. Building on the established diverse strategies, one can foresee that more innovative and structurally creative magnesium catalysts that are generated in situ will be developed to overcome more formidable challenges of catalytic enantioselective reactions.1 Introduction2 Magnesium Catalysts Generated in Situ from Chiral Ligands Containing Dual Reactive Hydrogens3 Magnesium Catalysts Generated in Situ from Monoanionic Chiral Ligands4 Bimetallic and Polymetallic Magnesium Catalysts Assembled in Situ5 Summary and Outlook

scholarly journals Underwater Holographic Sensor for Plankton Studies In Situ Including Accompanying Measurements

Sensors ◽  
2021 ◽  
Vol 21 (14) ◽  
pp. 4863
Author(s):  
Victor Dyomin ◽  
Alexandra Davydova ◽  
Igor Polovtsev ◽  
Alexey Olshukov ◽  
Nikolay Kirillov ◽  
...  
Keyword(s):  
World Ocean ◽  
Field Tests ◽  
Field Measurements ◽  
Measuring Systems ◽  
Water Turbidity ◽  
Background Data ◽  
Average Size ◽  
Size Dispersion

The paper presents an underwater holographic sensor to study marine particles—a miniDHC digital holographic camera, which may be used as part of a hydrobiological probe for accompanying (background) measurements. The results of field measurements of plankton are given and interpreted, their verification is performed. Errors of measurements and classification of plankton particles are estimated. MiniDHC allows measurement of the following set of background data, which is confirmed by field tests: plankton concentration, average size and size dispersion of individuals, particle size distribution, including on major taxa, as well as water turbidity and suspension statistics. Version of constructing measuring systems based on modern carriers of operational oceanography for the purpose of ecological diagnostics of the world ocean using autochthonous plankton are discussed. The results of field measurements of plankton using miniDHC as part of a hydrobiological probe are presented and interpreted, and their verification is carried out. The results of comparing the data on the concentration of individual taxa obtained using miniDHC with the data obtained by the traditional method using plankton catching with a net showed a difference of no more than 23%. The article also contains recommendations for expanding the potential of miniDHC, its purpose indicators, and improving metrological characteristics.

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