Combining geometric morphometrics with molecular genetics to investigate a putative hybrid complex: a case study with barbels Barbus spp. (Teleostei: Cyprinidae)

2016 ◽  
Vol 88 (3) ◽  
pp. 1038-1055 ◽  
Author(s):  
M. F. Geiger ◽  
C. Schreiner ◽  
G. B. Delmastro ◽  
F. Herder
Keyword(s):  
Geometric Morphometrics ◽  
Molecular Genetics ◽  
Putative Hybrid ◽  
Hybrid Complex

Classifying camel breeds using geometric morphometrics: A case study in Kuwait

2019 ◽  
Vol 230 ◽  
pp. 103824
Author(s):  
Bader H. Alhajeri ◽  
Randa Alaqeely ◽  
Hasan Alhaddad
Keyword(s):  
Geometric Morphometrics

scholarly journals A Comparison of Traditional and Geometric Morphometric Techniques for the Study of Basicranial Morphology in Horses: A Case Study of the Araucanian Horse from Colombia

Animals ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 118
Author(s):  
Pere Miquel Parés-Casanova ◽  
Arcesio Salamanca-Carreño ◽  
René Alejandro Crosby-Granados ◽  
Jannet Bentez-Molano
Keyword(s):  
Geometric Morphometrics ◽  
Domestic Animal ◽  
New Techniques ◽  
Geometric Morphometric ◽  
Animal Populations ◽  
Morphometric Methods ◽  
Mature Group ◽  
Geometric Morphometric Analysis ◽  
Shape And Size

Skull size and shape have been widely used to study domestic animal populations and breeds. Although several techniques have been proposed to quantify cranial form, few attempts have been made to compare the results obtained by different techniques. While linear morphometrics has traditionally been used in breed characterization, recent advances in geometric morphometrics have created new techniques for specifically quantifying shape and size. The objective of this study was to compare two morphometric methods for their ability to describe external morphology. For this purpose, 20 skull specimens of adult male Araucanian horses were examined. Two age categories were established (the “mature group”, M3 not fully erupted to moderately worn, n = 7; and the “senile group”, M3 totally erupted and highly worn, n = 13). Both methods showed that there were statistical differences between generations, but discrimination rates were different between methods with the geometric morphometric analysis obtaining a rate of 97.5%. Although linear morphometrics was found to be compatible with geometric morphometrics, the latter was better able to discriminate the two groups and it also provides more information on shape.

scholarly journals When hybrids are not hybrids: a case study of a putative hybrid zone betweenCattleya coccineaandC. brevipedunculata(Orchidaceae)

2016 ◽  
Vol 181 (4) ◽  
pp. 621-639 ◽  
Author(s):  
Bárbara S. S. Leal ◽  
Cleber J. N. Chaves ◽  
Samantha Koehler ◽  
Eduardo L. Borba
Keyword(s):  
Hybrid Zone ◽  
Putative Hybrid

Hybridisation, introgression events and cryptic speciation in Stipa (Poaceae): A case study of the Stipa heptapotamica hybrid-complex

2019 ◽  
Vol 39 ◽  
pp. 125457 ◽  
Author(s):  
Marcin Nobis ◽  
Polina D. Gudkova ◽  
Evgenii Baiakhmetov ◽  
Justyna Żabicka ◽  
Katarzyna Krawczyk ◽  
...  
Keyword(s):  
Cryptic Speciation ◽  
Hybrid Complex

Population genetic variation, structure, and evolution in Engelmann spruce, white spruce, and their natural hybrid complex in Alberta

2000 ◽  
Vol 78 (6) ◽  
pp. 768-780 ◽  
Author(s):  
Om P Rajora ◽  
Bruce P Dancik
Keyword(s):  
Genetic Variation ◽  
Picea Glauca ◽  
White Spruce ◽  
Natural Hybridization ◽  
Putative Hybrid ◽  
Species Differentiation ◽  
Engelmann Spruce ◽  
Hybrid Complex ◽  
Allozyme Loci ◽  
Putative Hybrids

Genetic variation, structure, and evolution of 12 populations of putative Engelmann spruce (Picea engelmanii Parry), white spruce (Picea glauca (Moench) Voss), and Engelmann - white spruce natural hybrids from the sympatric areas and two populations of white spruce from the allopatric areas in Alberta were examined using 23 allozyme loci coding for 13 enzymes in needles. Although most of the alleles were widespread, unique alleles were found in 9 of the 14 populations. No species-specific allele was observed. However, allele frequency differences were observed between the putative Engelmann and white spruce populations at a number of loci. Frequencies of 13 alleles showed significant correlation with altitude, those of 11 alleles showed correlation with latitude, and those of 3 alleles showed correlation with longitude. On average, 66.2% (99% criterion) of the loci were polymorphic, the number of alleles per locus was 1.88, the number of alleles per polymorphic locus was 2.88, and the observed and expected heterozygosities were 0.063 and 0.184, respectively. Genetic variability of allopatric white spruce, putative Engelmann, sympatric white spruce, and hybrid populations was quite comparable. The mean FST estimate was 0.123 for the total populations. Canonical discriminant functions separated four putative Engelmann spruce populations from the fifth putative Engelmann spruce population and from the allopatric and sympatric white spruce and sympatric putative hybrid populations. A cluster analysis from genetic distances generally separated allopatric and sympatric white spruce populations from the putative Engelmann spruce and hybrid populations. A Wagner tree of the 14 populations produced two main branches; one branch consisting of two allopatric and two sympatric white spruce and one putative hybrid populations, and another branch consisting of the remaining nine spruce populations representing putative Engelmann spruce, putative hybrids, and sympatric white spruce. Putative hybrids showed lower distances to white spruce from the canonical discriminant analysis, whereas they showed lower distances to putative Engelmann spruce from the genetic distance analysis. High allozyme genetic identities between putative Engelmann and white spruce and allelic differentiation related to altitude in Alberta suggest that Engelmann spruce could at best be considered as a subspecies of Picea glauca, with white spruce named as Picea glauca ssp. glauca and Engelmann spruce named as Picea glauca ssp. engelmannii.Key words: Picea glauca, Picea engelmannii, biosystematics, natural hybridization, species differentiation, genetic divergence.

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