Floral- and leaf-character variation in waratah (Telopea speciosissima, family Proteaceae), with reference to conservation and horticultural improvement

2007 ◽  
Vol 55 (7) ◽  
pp. 684 ◽  
Author(s):  
C. A. Offord
Keyword(s):  
Univariate Analysis ◽  
Natural Populations ◽  
Leaf Length ◽  
Canonical Variate ◽  
Leaf Margin ◽  
Unique Character ◽  
Leaf Character ◽  
Variate Analysis ◽  
Character Variation ◽  
Cultivated Populations

Univariate analysis (ANOVA) of waratah (Telopea speciosissima (Sm.) R.Br.) floral and leaf characters, chosen primarily for their horticultural importance, showed that there were detectable differences among populations and indicated, for most characters studied, that variation was greater among the tested natural populations than within. There were significant differences between some populations for all variables except inflorescence height. Inflorescence colour, particularly style colour, showed the greatest variation among populations and leaf margin type, leaf width and flower number were also variable. Inflorescence width, bract number, bract width, leaf length and leaf apex shape were variable within populations; however, they were less useful in distinguishing between populations. Multivariate analysis of characters (principle component analysis, PCA; or canonical variate analysis, CVA) showed unique character combinations in several of the populations studied. Natural waratah populations of this species can, therefore, be explored for unique, although subtle character variations for horticultural development. Conservation efforts should seek to maintain genetic diversity in natural populations and ensure that cultivated populations capture and maintain an appropriate level of diversity for continued selection and horticultural improvement.

scholarly journals A multivariate analysis of subline divergence in the shape of the mandible in C57BL/Gr mice

1973 ◽  
Vol 21 (2) ◽  
pp. 121-132 ◽  
Author(s):  
Michael Festing
Keyword(s):  
Multivariate Analysis ◽  
Distance Function ◽  
Canonical Variate ◽  
Multivariate Techniques ◽  
Graphical Display ◽  
Classification Analysis ◽  
Variate Analysis ◽  
Pedigree Relationship ◽  
Highly Correlated ◽  
Generalized Distance

SUMMARYThe shape of the mandible in. nine sublines of C57BL/Gr, seven other strains of ‘C57 ancestry’ and four unrelated strains was studied by multivariate techniques. The generalized distance function was used to classify individuals in the groups which they most closely resembled. The degree of misclassification depended on the pedigree relationship between strains and sublines. The generalized distance between pairs of subline centeroids was also highly correlated (r = 0·60) with the number of generations between them. A canonical variate analysis was used to reduce the dimensionality so that a graphical display of the relationships between strains and sublines could be made. The results agreed closely with the classification analysis. It was concluded that the shape of the mandible could be used for subline identification though the accuracy of this technique depends on how closely the sublines are related.

Taxonomic relationships of Nearctic small-footed bats of the Myotis leibii group (Chiroptera: Vespertilionidae)

1984 ◽  
Vol 62 (12) ◽  
pp. 2519-2526 ◽  
Author(s):  
C. G. van Zyll de Jong
Keyword(s):  
Canonical Variate Analysis ◽  
Canonical Variate ◽  
Separate Species ◽  
Taxonomic Relationships ◽  
Morphometric Analyses ◽  
Cranial Measurements ◽  
Variate Analysis ◽  
Myotis Leibii

Crania and bacula of five taxa of small-footed bats of the leibii group, comprising two currently recognised species, Myotis californicus and M. leibii, were studied to elucidate their interrelationships. Canonical variate analysis of 14 cranial measurements shows the existence of three distinct nonoverlapping clusters corresponding to (i) M. californicus, (ii) M. I. ciliolabrum and M. I. melanorhinus, and (iii) M. I. leibii. The results of the morphometric analyses do not support the claim that M. I. leibii and M. I. melanorhinus intergrade in Oklahoma. The taxonomic interpretation of the results is that the western forms of M. leibii represent a separate species M. ciliolabrum (Mcrriam). The bacula of the taxa studied lack distinctive characters that would allow one to discriminate between the species of the leibii group.

scholarly journals An application of canonical variate analysis in profile comparison of dry matter content of white clover between ozone-sensitive and ozone-resistant clones exposed in ambient air conditions

2015 ◽  
Vol 52 (1) ◽  
pp. 23-35 ◽  
Author(s):  
Dariusz Kayzer ◽  
Anna Budka ◽  
Klaudia Borowiak ◽  
Janina Zbierska ◽  
Marta Lisiak
Keyword(s):  
White Clover ◽  
Dry Matter ◽  
Profile Analysis ◽  
Ambient Air ◽  
Matter Content ◽  
Canonical Variate Analysis ◽  
Canonical Variate ◽  
Dry Matter Content ◽  
The World ◽  
Variate Analysis

SummaryTropospheric ozone affects plant growth and the yield of main pasture species all around the world. Experiments are usually performed in fully controlled conditions; the number of investigations in ambient air conditions is still limited. Moreover, most investigations of the effect of ozone on white clover biomass production consider one series after the other, including a period without leaves. Hence, based on the recommendations, additional series are proposed and studied here. The responses of sensitive and resistant white clover clones are presented and compared using multivariate analysis of variance and profile analysis. The canonical variate analysis used here makes it possible to present the profile comparison of dry matter content of white clover graphically in Euclidean space. The investigations revealed a difference in response between clones and the necessity of using the additional series.

scholarly journals Leaf geometric morphometrics among populations of Dalbergia ecastaphyllum (L.) Taub.

2019 ◽  
Vol 35 (6) ◽  
Author(s):  
Daniel Vieira de Morais ◽  
Lorena Andrade Nunes ◽  
Vandira Pereira da Mata ◽  
Maria Angélica Pereira de Carvalho Costa ◽  
Geni da Silva Sodré ◽  
...  
Keyword(s):  
Principal Component Analysis ◽  
Geometric Morphometrics ◽  
Cross Validation ◽  
Abiotic Factors ◽  
Principal Component ◽  
Canonical Variate ◽  
Validation Test ◽  
Significant Difference ◽  
Variate Analysis ◽  
Geographical Distances

Leaves are plant structures that express important traits of the environment where they live. Leaf description has allowed identification of plant species as well as investigation of abiotic factors effects on their development, such as gases, light, temperature, and herbivory. This study described populations of Dalbergia ecastaphyllum through leaf geometric morphometrics in Brazil. We evaluated 200 leaves from four populations. The principal component analysis (PCA) showed that the first four principal components were responsible for 97.81% of variation. The non-parametric multivariate analysis of variance (NPMANOVA) indicated significant difference between samples (p = 0.0001). The Mentel test showed no correlation between geographical distances and shape. The canonical variate analysis (CVA) indicated that the first two variables were responsible for 96.77 % of total variation, while the cross-validation test showed an average of 83.33%. D. ecastaphyllum leaves are elliptical and ovate.

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