Multivariate analysis of edible Asparagus species in Iran by morphological characters

Euphytica ◽  
2015 ◽  
Vol 206 (2) ◽  
pp. 445-457 ◽  
Author(s):  
Seyyed Javad Mousavizadeh ◽  
Mohammad Reza Hassandokht ◽  
Abdolkarim Kashi
Keyword(s):  
Multivariate Analysis ◽  
Morphological Characters

scholarly journals Use of Highly Discriminating Morphological Characters and Isozymes in the Study of Spanish Chestnut Cultivars

2006 ◽  
Vol 131 (6) ◽  
pp. 770-779 ◽  
Author(s):  
Santiago Pereira-Lorenzo ◽  
María Belén Díaz-Hernández ◽  
Ana María Ramos-Cabrer
Keyword(s):  
Principal Component Analysis ◽  
Cluster Analysis ◽  
Multivariate Analysis ◽  
Castanea Sativa ◽  
Principal Component ◽  
Market Value ◽  
Morphological Characters ◽  
Minor Importance ◽  
Breeding Programs ◽  
And Cluster Analysis

Morphological characters (six traits) and isozymes (four systems, five loci) were used to discriminate between Spanish chestnut cultivars (Castanea sativa Mill.) from the Iberian Peninsula. A total of 701 accessions (representing 168 local cultivars) were analyzed from collections made between 1989 and 2003 in the main chestnut growing areas: 31 were from Andalucía (12 cultivars), 293 from Asturias (65 cultivars), 25 from Castilla-León (nine cultivars), four from Extremadura (two cultivars) and 348 from Galicia (80 cultivars). Data were synthesized using multivariate analysis, principal component analysis, and cluster analysis. A total of 152 Spanish cultivars were verified: 58 cultivars of major importance and 94 of minor importance, of which 18 had high intracultivar variation. Thirty-seven cultivars were clustered into 14 synonymous groups. Six of these were from Galicia, one from Castilla-León (El Bierzo), four from Asturias, one from Asturias and Castilla-León (El Bierzo), and two from Asturias, Castilla-León (El Bierzo), and Galicia. The chestnut cultivars from Galicia and Asturias were undifferentiated in genetic terms, indicating that they are not genetically isolated. Overall, chestnut cultivars from southern Spain showed the least variation. Many (58%) of Spanish cultivars produced more than 100 nuts/kg; removing this low market-value character will be a high priority. The data obtained will be of use in chestnut breeding programs in Spain and elsewhere.

Multivariate analysis of morphological characters in Setaria leiantha Hackel

Euphytica ◽  
1994 ◽  
Vol 80 (1-2) ◽  
pp. 13-17
Author(s):  
Mar�a Eugenia C�ceres ◽  
Carlos Alberto Biasutti ◽  
M�nica Balzarini ◽  
Argos Argentino Rodriguez
Keyword(s):  
Multivariate Analysis ◽  
Morphological Characters

scholarly journals Morphological discrimination in juveniles of two Selene Species (Teleostei: Carangidae) using truss net distances

2006 ◽  
Vol 49 (2) ◽  
pp. 231-238 ◽  
Author(s):  
José de Melo Lima Filho ◽  
Rosângela Lessa ◽  
Borko Stosic ◽  
Paulo José Duarte Neto ◽  
José Wilson Vieira
Keyword(s):  
Multivariate Analysis ◽  
Morphological Characters ◽  
Northeastern Brazil ◽  
Language Program ◽  
C Language ◽  
Morphological Distinction ◽  
Euclidean Distances ◽  
Scion Image ◽  
Fin Spines ◽  
Pelvic Fin

External morphological distinction between young Selene vomer and S. brownii (Carangidae) was studied using multivariate analysis with the purpose to evaluate if other characters than the second dorsal and pelvic fin spines could be used as distinguishing attributes for juveniles fishes. These spines are important distinctive morphological characters, but they can be absent in juvenile fishes or be broken during manipulation. A sample of 389 specimens was collected from beach netting at Caiçara do Norte (RN), northeastern Brazil, in 2001. Each specimen was digitalized and their images provided numerical matrices using Scion Image and FANTOMAS software. A C-language program was developed and used to calculate 16 Euclidean distances and nine homologous landmarks plotted on images. Discriminant analysis results revealed that the two Selene species was clearly distinguished employing morphometric procedures of diagonally oriented measurements of the antero-posterior body axis.

First fossils of the isopod genus Aega Leach, 1815

2010 ◽  
Vol 84 (1) ◽  
pp. 141-147 ◽  
Author(s):  
Thomas Hansen ◽  
Jesper Hansen
Keyword(s):  
Multivariate Analysis ◽  
Late Miocene ◽  
Morphological Characters ◽  
Preliminary Study ◽  
Cymothoid Isopod

Two abdominal molts representing a small cymothoid isopod are described from the marine late Miocene Gram Formation of southern Denmark. Abdominal molts are generally regarded as being difficult or even impossible to assign to genus or family due to overlap of morphological characters. A preliminary study supported by statistical and multivariate analysis of the genera most closely resembling the specimens reveals that although some overlap in characters do occur, the genera can to a large extent be defined by a diagnostic set of features. The Danish Miocene taxon described herein is assigned to Aega Leach, 1815 as the only known fossil of this important cosmopolitan genus.

A multivariate analysis of the Pitcairnia palmeri group (Bromeliaceae: Pitcairnioideae)

Phytotaxa ◽  
2018 ◽  
Vol 351 (3) ◽  
pp. 219
Author(s):  
EDITH GONZÁLEZ-ROCHA ◽  
MANUEL ARNOLDO CASTILLO-RIVERA ◽  
ANA ROSA LÓPEZ-FERRARI ◽  
ADOLFO ESPEJO-SERNA
Keyword(s):  
Multivariate Analysis ◽  
Discriminant Analysis ◽  
Principal Components ◽  
Taxonomic Status ◽  
Morphological Characters ◽  
Accurate Information ◽  
Cluster Analyses ◽  
Floral Bracts

A multivariate analysis of the Pitcairnia palmeri group are presented. Principal Components and Cluster analyses were performed in order to have more accurate information to delimit the species. The analyses showed that the specimens referred to Pitcairnia palmeri var. longebracteata are clearly delimited, while those identified as P. palmeri var. palmeri, P. colimensis, and P. compostelae have a greater overlap of morphological characters, but remain as separate entities. A discriminant analysis showed that morphological characters used have significant multivariate differences between the taxa (P < 0.0005), and that the most important variables in the differentiation of these taxa are the percentage of floral bracts that exceeds the length of the sepals, the length of the floral bracts, and the length of the peduncle. We conclude that P. palmeri var. longebracteata is clearly a different species, not a variety, therefore is described and illustrated as P. robert-downsii, and that P. palmeri, P. compostelae and P. colimensis maintain their taxonomic status.

A taxonomic review of Triodia bunicola and T. scariosa (Poaceae: Chloridoideae), based on morphological and molecular data

2012 ◽  
Vol 25 (5) ◽  
pp. 304 ◽  
Author(s):  
Charlotte R. Hurry ◽  
Neville G. Walsh ◽  
Daniel J. Murphy
Keyword(s):  
Multivariate Analysis ◽  
Cladistic Analysis ◽  
Morphological Characters ◽  
Molecular Data ◽  
Dna Evidence ◽  
Australian Species ◽  
Geographic Patterns ◽  
Ordination Analysis ◽  
Nuclear Its ◽  
Morphological And Molecular Data

Triodia bunicola (S.W.L.Jacobs) Lazarides and T. scariosa N.T.Burb. (Poaceae: Chloridoideae) were analysed to test their status as different species. Thirty-one morphological characters were scored for multivariate analysis for both species. Nuclear (ITS) and chloroplast (rpl32–trnL) DNA data were analysed cladistically for 18 species of Triodia, with a focus on species from southern Australia to look at broader geographic patterns. Cladistic analysis and morphological ordination analysis indicated that T. bunicola should be regarded as a synonym of T. scariosa. DNA evidence also suggests that there is geographic partitioning for southern Australian species of Triodia.

scholarly journals PHENETIC ANALYSIS AND DISTRIBUTION OF CLAOXYLON IN THE LESSER SUNDA ISLANDS

Floribunda ◽  
2020 ◽  
Vol 6 (5) ◽  
Author(s):  
Adhy Widya Setiawan ◽  
Tatik Chikmawati
Keyword(s):  
Multivariate Analysis ◽  
Numerical Taxonomy ◽  
Morphological Characters ◽  
Phenetic Analysis ◽  
Number Of Species ◽  
Distribution Mapping ◽  
Analysis System ◽  
Eleven Species

Phenetic Analysis and Distribution of Claoxylon in the Lesser Sunda Islands. Floribunda 6(5): 167–174.  — The genus Claoxylon A.Juss. in the Lesser Sunda Islands (LSI) was reviewed. Eleven species were recognized in Lesser Sunda Islands. Records of C. capillipes and C. fulvescens were extended to the Bali Island. Based on distribution of Claoxylon in LSI, Bali has the highest number of species (7 species), while Wetar shows the least number of species (only 1 species). A phenetic analysis was using Numerical Taxonomy and Multivariate Analysis System (NTSYS-pc) version 2.11a and distribution mapping using Quantum GIS version 2.4. Based on 14 morphological characters grouped Claoxylon species in LSI into three groups. All Claoxylon in LSI belong to section Indica and Affinia.

scholarly journals Analysis of Wild Evergreen Azalea Populations of the Kirishima Mountains based on Multivariate Analysis of Morphological Characters

2003 ◽  
Vol 2 (4) ◽  
pp. 265-268 ◽  
Author(s):  
Nobuo Kobayashi ◽  
Yoichi Morinaka ◽  
Takashi Handa ◽  
Kenji Takayanagi ◽  
Kenichi Arisumi
Keyword(s):  
Multivariate Analysis ◽  
Morphological Characters ◽  
Evergreen Azalea

Monoterpene and morphological variation and hybridization of Pinus contorta and P. banksiana in Alberta

1985 ◽  
Vol 63 (2) ◽  
pp. 201-210 ◽  
Author(s):  
John C. Pollack ◽  
Bruce P. Dancik
Keyword(s):  
Multivariate Analysis ◽  
Pinus Contorta ◽  
Lodgepole Pine ◽  
Morphological Characters ◽  
Jack Pine ◽  
Putative Hybrid ◽  
Front Range ◽  
Needle Length ◽  
Pine Stands ◽  
Monoterpene Composition

Five xylem oleoresin monoterpenes and 17 morphological characters of trees in four pine stands in Alberta were measured to delineate pure lodgepole pine (Pinus contorta Dougl. var. latifolia Engelm.) from jack pine (P. banksiana Lamb.) in a region where hybridization commonly has been reported. Multivariate analysis determined α-pinene, β-phellandrene, and needle length best separated the taxa. The monoterpene composition of two putative hybrid stands at Onoway and Devon closely resembled that of jack pine. Analysis of the four major monoterpenes in an additional 10 stands allowed the identification of a transition zone between jack pine and lodgepole pine stands, which occurred farther west than previously reported and contained stands of highly variable monoterpene types. Trees in this region morphologically resembled lodgepole pine. The presence of variant monoterpene types in Front Range lodgepole pine stands and their absence from the Cypress Hills provide evidence for introgression of jack pine into lodgepole pine. No evidence of gene flow from lodgepole pine to jack pine was found. The two putative hybrid stands at Onoway and Devon probably consisted mostly of jack pine, with a small complement of hybrids.

scholarly journals Univariate and Multivariate Analysis of Agronomical Traits of Preselected Argan Trees

2012 ◽  
Vol 40 (2) ◽  
pp. 308 ◽  
Author(s):  
Naima AIT AABD ◽  
Fouad MSANDA ◽  
Abdelhamid EL MOUSADIK
Keyword(s):  
Genetic Diversity ◽  
Multivariate Analysis ◽  
Coefficient Of Variation ◽  
Oil Content ◽  
Agronomic Traits ◽  
Three Dimensional ◽  
Morphological Characters ◽  
Seed Length ◽  
Argania Spinosa ◽  
Seed Width

A collection of thirty argan trees (Argania spinosa (L.) Skeels), representing the Aoulouz provenance in southwest of Morocco were used to study genetic variability and selection for three years. In this study, the genetic diversity of thirty genotypes (tree mothers) of argan (Argania spinosa) collected from Aoulouz was evaluated using agro-morphological characters. The main objective of the study was to assess and describe with multivariate analysis the genetic diversity in order to select good candidate trees for a future breeding program. The results obtained showed a large variation for all the traits examined. Analysis of variance using general linear model provided a significant variation between genotypes. Furthermore, genotypic and phenotypic variances for quantitative traits, particularly for seed length, seed width, almond length and oil content were higher. Phenotypic coefficient of variation was higher than genotypic coefficient of variation for all the characters. High heritability was recorded for oil content (97.90%), seed width (72.68%) and seed length (57.55%) respectively, indicating the additive gene action. In addition, a three dimensional plot based on principal coordinate analysis method was used to evaluate the performance genotypes as to the production of oil for three years. The genotypes ‘Ao-12R’, ‘Ao-7R’, ‘Ao-4R’, ‘Ao-4V’, ‘Ao-11R’, ‘Ao-8V’ and ‘Ao-7V’ were found to be the best for high oil content. Identification and selection with superior agronomic traits may be an effective method for genetic improvement of argan trees, and a first step for further breeding studies.

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