scholarly journals Morphotype and Multivariate Analysis of the Occlusal Pattern of the First Lower Molar in European and Asian Arvicoline Species (Rodentia, Microtus, Alexandromys)

Zoodiversity ◽  
2020 ◽  
Vol 54 (5) ◽  
pp. 383-402
Author(s):  
I. O. Synyavska ◽  
V. N. Peskov
Keyword(s):  
Multivariate Analysis ◽  
Morphological Diversity ◽  
Interspecific Differences ◽  
Lower Molar

We studied the morphotypic variation of the occlusal pattern of m1 in 13 arvicoline species (genera Microtus and Alexandromys). As a result, 22 m1 morphotypes were identified. In Alexandromys, five morphotypes of m1 were found, while in Microtus only seven. The morphological diversity of m1 morphotypes (H) in voles of the genus Microtus is significantly lower compared to Alexandromys. The largest number of m1 morphotypes and the highest morphological diversity of m1 were revealed in the Mongolian vole (14 morphotypes and H = 2.134), while the lowest values (two morphotypes and H = 0.285) occur in the population of M. levis from Orlov Island. An attempt of ecological and taxonomical interpretation of interspecific differences was made based on the m1 morphotypes.

Multivariate analysis of morphological diversity among closely related Daucus species and subspecies in Tunisia

2017 ◽  
Vol 64 (8) ◽  
pp. 2145-2159 ◽  
Author(s):  
Najla Mezghani ◽  
Jihene Ben Amor ◽  
David M. Spooner ◽  
Phillip W. Simon ◽  
Neila Mezghani ◽  
...  
Keyword(s):  
Multivariate Analysis ◽  
Morphological Diversity

scholarly journals Rice Diversity Panel Evaluated for Agro-Morphological Diversity by Multivariate Analysis

2017 ◽  
Vol 6 (11) ◽  
pp. 3887-3901 ◽  
Author(s):  
N. Vishnu Varthini ◽  
D. Sudhakar ◽  
M. Raveendran ◽  
S. Rajeswari ◽  
S. Manonmani ◽  
...  
Keyword(s):  
Multivariate Analysis ◽  
Morphological Diversity ◽  
Diversity Panel ◽  
Rice Diversity

Dealing with farmers’ Ethnolinguistic differences when collecting crop diversity on-farm

2016 ◽  
Vol 15 (5) ◽  
pp. 400-408
Author(s):  
Joseph Ireri Kamau ◽  
Vanesse Labeyrie ◽  
Grace Njeri Njoroge ◽  
Anthony Kibira Wanjoya ◽  
Peterson Weru Wambugu ◽  
...  
Keyword(s):  
Multivariate Analysis ◽  
Plant Genetic Resources ◽  
A Priori ◽  
Sustainable Use ◽  
Morphological Characteristics ◽  
Morphological Differentiation ◽  
Morphological Diversity ◽  
Crop Diversity ◽  
Intraspecific Diversity ◽  
Ex Situ

AbstractIdentification and characterization of the farmers’ named crop varieties cultivated around the world is a major issue for conservation and sustainable use of plant genetic resources. Intraspecific diversity is strongly determined by farmers’ socio-cultural environment, but this has little been documented. In this paper, we tested, on a contact zone among three ethnolinguistic groups located on the Mount Kenya region, whether farmers’ socio-cultural differences have an impact on the morphological characteristics of the farmers’ named sorghum varieties. Eighteen qualitative morphological traits of the panicles were measured. We first compared the morphological diversity of the named varieties among ethnolinguistic groups using multivariate analysis of homogeneity of groups’ dispersion and tested their differentiation using permutational multivariate analysis of variance. Discriminant analysis of principal components was then used to categorize the morphological diversity withouta priori, and this classification was compared with farmers’ local taxonomy (vernacular names) in the three ethnolinguistic groups. Our results show that some morphotypes are peculiar to some ethnolinguistic groups and that a morphotype can bear different variety names while the same variety name can be used to identify different morphotypes. Morphological differentiation that was explained by ethnolinguistic groups was higher for local landraces than for improved varieties. Our findings imply that socio-cultural diversity of farmers and the criteria they use to identify and maintain landraces need to be considered in studying and sampling crop diversity forin situas well as forex situconservation.

Morphological and molecular diversity of the wild carrot Daucus pusillus: implications for classification and ex situ conservation

Botany ◽  
2014 ◽  
Vol 92 (5) ◽  
pp. 348-359 ◽  
Author(s):  
Maria S. Ibañez ◽  
Elsa L. Camadro ◽  
Carlos A. Sala ◽  
Ricardo W. Masuelli
Keyword(s):  
Multivariate Analysis ◽  
North American ◽  
Molecular Diversity ◽  
Taxonomic Status ◽  
Morphological Diversity ◽  
Its Region ◽  
Inter Simple Sequence Repeat ◽  
Ex Situ ◽  
Daucus Carota L ◽  
5.8S Rdna

Daucus pusillus Michx. and Daucus montevidensis Link ex Spreng. are wild carrots from the Americas with unresolved taxonomic status. An investigation was carried out with accessions of D. pusillus and (or) D. montevidensis from Argentina for (i) morphological and molecular (amplified fragments length polymorphism (AFLP) and inter simple sequence repeat (ISSR)) characterization, (ii) analysis of congruence of morphological and molecular variation, and (iii) comparison of diversity for the internal transcribed spacer (ITS) region with that reported for a North American accession of D. pusillus. Twelve accessions of D. pusillus and (or) D. montevidensis — representing their geographical distribution in Argentina — and one accession each of wild Daucus carota L. and Daucus montanus Humb. & Bonpl. ex Schult. — as outgroups — were included. In the multivariate analysis of morphological diversity, two accessions were clearly differentiated; this result is not sustained by multivariate analysis of molecular diversity. Based on multivariate and molecular variance (AMOVA) analyses, D. pusillus and (or) D. montevidensis accessions were separated at the molecular level into two groups, associated with geographical origin. Because this result is not supported by morphology, the segregation into two taxa seems unjustified. In all accessions, ITS and 5.8S rDNA regions had identical sequences, which differ in one nucleotide from the corresponding sequence of the North American accession. According to the combined results, D. pusillus would be a single taxon distributed from North to South America, and D. montevidensis a nomenclatural synonym. Autogamy of D. pusillus and its highly structured genetic diversity (Fst = 0.86) allows the application of a geographically targeted approach for germplasm exploration, conservation and eventual use in pre-breeding.

scholarly journals Taxonomical revision of the genus Hypseocharis in Peru and Bolivia

2020 ◽  
Vol 27 (3) ◽  
pp. 383-394
Author(s):  
Sissi Lozada-Gobilard ◽  
Sergio Avila-Calero ◽  
Teresa Ortuno ◽  
Maximilian Weigend
Keyword(s):  
Multivariate Analysis ◽  
Morphometric Analysis ◽  
Morphological Diversity ◽  
Morphological Characters ◽  
Terminal Leaflet ◽  
Herbarium Specimens ◽  
Polymorphic Species ◽  
Yellow Orange ◽  
Taxonomical Revision ◽  
La Rioja

In the present study we revised the genus Hypseocharis in Bolivia and Peru. A total number of 105 herbarium specimens were revised to evaluate the morphological diversity across the range of the genus. In a subset of 24 complete individuals a multivariate morphometric analysis was performed to evaluate the morphological characters historically used to differentiate the “species” of the genus Hypseocharis. A revision of the herbarium material indicated that there are no sharp lines dividing the different “species” with the only exception of H. tridentata. The multivariate analysis indicated that H. bilobata, H. malpasensis and H. pedicularifolia all occupy the same morphospace as H. pimpinellifolia and there are no individual morphological characters or suites of characters permitting the differentiation of distinct taxa. This confirms earlier findings from Argentina: There are only two species in the genus, widespread Hypseocharis pimpinellifolia and H. tridentata. Hypseocharis pilgeri, originally described from Peru, can also not be differentiated from H. pimpinellifolia. We propose the recognition of only two species: H. pimpinellifolia with variously pinnate to bipinnate leaves with a terminal leaflet at most marginally larger than the lateral ones, flowers with 15 anthers and capsular fruits as differing from H. tridentata with pinnate leaves with the terminal leaflet much larger than the lateral ones, flowers with 5 anthers and schizocarpic fruits. Hypseocharis pimpinellifolia is a widespread and polymorphic species, ranging from Ancash (Peru) to La Rioja (Argentina) and comprises forms with white, yellow, orange, and red corollas and with simply pinnate to very finely bipinnate leaves.

Novel Geometric Morphometric (GMM) Application to the Study of Bronze Age Tutuli

2019 ◽  
Vol 8 ◽  
pp. 1-24
Author(s):  
Christina Vestergaard ◽  
Christian Steven Hoggard
Keyword(s):  
Multivariate Analysis ◽  
Bronze Age ◽  
Temporal Relationship ◽  
Morphological Diversity ◽  
Two Dimensional ◽  
Geometric Morphometric ◽  
Object Group ◽  
Research Questions

In this paper, we examine the morphological diversity of the tutuli object group from the earlier Nordic Bronze Age (henceforth NBA) – an often over-looked object group despite their abundance specially, temporally and contextually. Currently, only a few studies of the morphological diversity of tutuli have been published, and these consist primarily of decade-old-typologies. The objective of this of this paper is first and foremost methodological, as we examine two research questions – concerning classification and periodisation – through a novel two-dimensional geometric morphometric (henceforth GMM) framework and subsequent multivariate analysis. Inherently we examine whether specific shapes conform to the classificatory of the Montelius typology, and whether a temporal relationship exists between types and shapes.

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