Morphological variability of seed qualitative and quantitative traits in Macedonian runner bean local cultivars

2021 ◽  
pp. 41-48
Author(s):  
M. Jankulovska ◽  
S. Ivanovska ◽  
N. Sandeva Atanasova
Keyword(s):  
Quantitative Traits ◽  
Morphological Variability ◽  
Qualitative And Quantitative ◽  
Local Cultivars ◽  
Runner Bean

Untangling the Echiniscus Gordian knot: Stellariscus gen. nov. (Heterotardigrada : Echiniscidae) from Far East Asia

2018 ◽  
Vol 32 (5) ◽  
pp. 1234 ◽  
Author(s):  
Piotr Gąsiorek ◽  
Atsushi C. Suzuki ◽  
Reinhardt M. Kristensen ◽  
Dorota Lachowska-Cierlik ◽  
Łukasz Michalczyk
Keyword(s):  
Sexual Dimorphism ◽  
Quantitative Traits ◽  
New Genus ◽  
Morphological Variability ◽  
Far East ◽  
Dorsal Plate ◽  
Taxonomic Significance ◽  
Qualitative And Quantitative ◽  
The Family ◽  
Terrestrial Habitats

Species constituting the family Echiniscidae are highly derived, armoured and inhabit terrestrial habitats, in contrast to other heterotardigrades that are predominantly marine. The genus Echiniscus C.A.S. Schultze, 1840, nominal for the family Echiniscidae, is currently the most speciose tardigrade genus. However, the great morphological variability, in comparison with other heterotardigrade genera, suggests the polyphyletic character of the genus. Here, we analyse new specimens of Echiniscus pseudelegans Séméria, 1994 collected in Japan and conclude that the species as well as two other related taxa, E. elegans Richters, 1907 and E. latifasciatus Dudichev and Biserov, 2000, represent a new genus, Stellariscus, gen. nov. The new genus is characterised by a mixture of peculiar morphological apomorphies: black eyes, star-like dorsal plate sculpturing, no trunk appendages (only cephalic cirri present), two types of ventral plates, and striking sexual dimorphism in both qualitative and quantitative traits. Morphological phylogeny of the family Echiniscidae suggests a close affinity between Stellariscus, Hypechiniscus Thulin, 1928 and Pseudechiniscus Thulin, 1911. The polyphyletic status of both Echiniscus and Testechiniscus Kristensen, 1987 is also inferred. The taxonomic significance of ventral armature in echiniscid phylogeny and taxonomy is discussed.

scholarly journals Morphological variability of the leaf epidermis in selected taxa of the genus Ficus L. (Moraceae) and its taxonomic implications

2011 ◽  
Vol 75 (4) ◽  
pp. 309-324 ◽  
Author(s):  
Małgorzata Klimko ◽  
Mariola Truchan
Keyword(s):  
Cell Walls ◽  
Quantitative Traits ◽  
Morphological Variability ◽  
Epidermal Cells ◽  
Leaf Epidermis ◽  
Qualitative And Quantitative ◽  
Size And Shape ◽  
Taxonomic Implications

The leaf epidermis of 36 taxa (species, subspecies, varieties and cultivars) of the genus <em>Ficus</em> (subgenera <em>Ficus</em>, <em>Synoecia</em>, <em>Sycomorus</em>, <em>Pharmacosycea</em> and <em>Urostigma</em>) was observed under LM and SEM. Characteristics of the epidermis are of particular taxonomic as well as phylogenetic interest because they differ conspicuously between species. The differences are especially prominent in the size and shape of epidermal cells, the shape of cell walls, peristomatal cuticular rim, the distribution and position of stomata, lithocysts, hydathodes, trichomes, and the types of wax, cuticle and trichomes. Results of this study provided data on new qualitative and quantitative traits of the leaf epidermis in the selected taxa, and confirmed the classification suggested by Berg (1989).

scholarly journals Morphological And Ecogeographic Study Of The Diversity Of Cassava (Manihot esculenta Crantz) In Ecuador

2021 ◽  
Author(s):  
Álvaro - Monteros-Altamirano ◽  
César - Tapia ◽  
Nelly - Paredes ◽  
Victor Alulema ◽  
Marcelo Tacán ◽  
...  
Keyword(s):  
Manihot Esculenta ◽  
Morphological Variability ◽  
Morphological Characterization ◽  
Economic Importance ◽  
Extreme Conditions ◽  
Morphological Descriptors ◽  
Manihot Esculenta Crantz ◽  
Qualitative And Quantitative ◽  
Edaphic Conditions

Cassava (Manihot esculenta Crantz) is a crop of nutritional and economic importance worldwide, cultivated in more than 100 tropical and subtropical countries including Ecuador, traditionally cultivated in its three continental regions: the Amazon, the Coast and in the valleys of the Sierra. The purpose of this study was to characterize 195 accessions from INIAP's Ecuadorian cassava collection through 1) morphological characterization with qualitative and quantitative descriptors; and 2) ecogeographic characterization to know the climatic, geophysical and edaphic conditions in which cassava grows and which environments are frequent or marginal for its cultivation. For the morphological characterization, 27 morphological descriptors were used (18 qualitative and nine quantitative), and for the ecogeographic characterization, 55 variables (41 climatic, two geophysical and 12 edaphic). As a result, four morphological groups and three ecogeographic groups were identified. In the research, morphological variability was evidenced, mainly in descriptors related to the leaf, stems and inflorescences. In addition, it was possible to identify accessions that can adapt to extreme conditions of drought and poor soils, which could be used for improvement.

Different breeding conditions affect the morphological variability in larvae of Platytrombidium fasciatum (Trombidiformes: Microtrombidiidae)

2021 ◽  
Vol 26 (6) ◽  
pp. 1055-1066
Author(s):  
Anna Derdak ◽  
Magdalena Felska ◽  
Joanna Mąkol ◽  
Paula Zajkowska
Keyword(s):  
Quantitative Traits ◽  
Morphological Variability ◽  
Thermal Conditions ◽  
Dark Cycle ◽  
Posterior Edge ◽  
Morphometric Traits ◽  
Egg Incubation ◽  
The Impact ◽  
Metric Traits ◽  
Duration Of Development

The impact of temperature and light/dark cycle on morphological traits of Platytrombidium fasciatum was examined in larvae obtained from field-collected females. The eggs laid by 65 females at laboratory conditions were assigned to four experimental groups. Varied thermal conditions affected the values of nine out of 46 (nonparametric MANOVA) and 26 out of 37 (LDA) morphometric traits in larvae. As many as six quantitative traits differed significantly irrespective of the method (MANOVA, LDA) applied. The analysis of the metric traits within the dorsal sclerites revealed that the lower mean temperature over the period of egg incubation, translated into longer duration of development, was associated with an increase in distance between the bases of 3rd pair of non-sensillary setae on scutum at the decrease in distance between the bases of 2nd pair of non-sensillary setae as well as in distance between the level of sensilla and the posterior edge of the sclerite. In the case of 40 measurable traits in larvae of P. fasciatum, the variability going beyond the hitherto knowledge on the species was observed.

scholarly journals Karyological and morphological variations within the genus Dysphania (Chenopodiaceae) in Bulgaria

2013 ◽  
Vol 72 (1) ◽  
pp. 49-69 ◽  
Author(s):  
Neli H. Grozeva ◽  
Yanka G. Cvetanova
Keyword(s):  
Statistical Analysis ◽  
Chromosome Number ◽  
Quantitative Traits ◽  
Morphological Variability ◽  
Evolutionary Mechanisms ◽  
Qualitative Traits ◽  
Phenotype Variation ◽  
Morphological Variations ◽  
Interpopulation Variation ◽  
Generative Organs

AbstractThe karyological and morphological variability of species from the genus Dysphania were studied. The results demonstrated that genus Dysphania is represented in Bulgaria by five species: Dysphania ambrosioides, D. multifida, D. botrys, D. schraderiana and D. pumilio. The first two species are tetraploids with chromosome number 2n = 32 for D. ambrosioides and 2n = 36 for D. multifida. The remaining three species are diploids with 2n = 18. The results from statistical analysis demonstrated that the main source of phenotype variation in the species is the interpopulation variation. The specific characters which allowed their recognition are themorphological characteristics of the perianth lobes, the upper leaves and the seeds. The distinction between D. multifida, D. ambrosioides and D. schraderiana is based on differences in the quantitative traits, while in D. botrys and D. pumilio qualitative traits are also important. The basic evolutionary mechanisms are polyploidy and diploidy.Atendency towards reduction in the size of generative organs and the number of perianth lobes was found.

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