Anatomy study of the genus Cirsium Mill. in Iran

The genus Cirsium Mill. (Asteraceae) also known as plume thistles with about 250 perennial, biennial or rarely annual spiny species is a phylogenetically unresolved and paraphyletic genus. Cirsium species grow in different ecological conditions and tend to form interspecific hybrids. Some species are morphologically very similar and need to be delineated by additional anatomical and molecular characters. About 28 Cirsium species have been reported in Flora Iranica; they were classified in five sections. Taxonomic investigation of these species was confined to morphology and molecular study of RAPD and ISSR markers. The present study carried out anatomical investigation (leaf and stem characters) of Cirsium species in the country. PCoA analysis of anatomical characters could delimit the studied species and the grouping obtained was almost in agreement with morphological and sectional delineation of the genus. The results obtained are in agreement with several other investigations and all together suggestive of the continued gene flow and introgression between Cirsium species that make taxonomy and phylogenetic relationship of the species difficult.

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Genetic Diversity and Relationship of Mulberry Genotypes Revealed by RAPD and ISSR Markers

Journal of Crop Improvement ◽

10.1080/15427528.2016.1177803 ◽

2016 ◽

Vol 30 (4) ◽

pp. 478-492 ◽

Cited By ~ 4

Author(s):

Rita Banerjee ◽

S. Chattopadhyay ◽

A. K. Saha

Keyword(s):

Genetic Diversity ◽

Issr Markers ◽

Relationship Of ◽

Rapd And Issr

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Biosystematic study of the genus Lallemantia (Lamiaceae): species delimitation and relationship

Acta Biologica Szegediensis ◽

10.14232/abs.2019.2.157-168 ◽

2020 ◽

Vol 63 (2) ◽

pp. 157-168

Author(s):

Fahimeh Koohdar ◽

Masoud Sheidai

Keyword(s):

Phylogenetic Trees ◽

Molecular Study ◽

Morphological Characters ◽

Issr Markers ◽

Evolutionary Analysis ◽

Species Relationship ◽

Beast Analysis ◽

Cpdna Markers ◽

Components Analysis ◽

Relationship Of

Lallemantia (Lamiaceae) is a small genus with 5 species. In general, little biosystematics and molecular study has been performed on the genus Lallemantia. Moreover, the studies used only some of the species; none of them has considered all 5 species as a whole in one specific approach. Therefore, the species inter-relationship or nexus in the genus is not thoroughly probed. The present study investigated the molecular phylogeny and species relationship of all five species in the genus Lallemantia, using ribosomal protein L16 and the multilocus ISSR markers. It also compared their morphometric, anatomical and seed results. The species were efficaciously delimited by the morphological, anatomical and seed characters, as well as by ISSR and cpDNA markers. The PCA (Principal components analysis) plot of the species based upon the morphological characters, the MDS (Multidimensional Scaling) plot of the species based on the nutlet and anatomical characters, the NJ (neighbor joining) tree plot of ISSR dataand the ML tree of cpDNA revealed closer affinity between L. iberica and L. canescens and L. peltata was placed at some distance from these species. The phylogenetic trees displayed monophyly of the genus Lallemantia. The Bayesian Evolutionary Analysis by Sampling Trees (BEAST) analysis unveiled that the studied Lallemantia species started to diverge about 25 million years ago.

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Genomic Balance and Speciation

Epigenetics Insights ◽

10.1177/2516865719840291 ◽

2019 ◽

Vol 12 ◽

pp. 251686571984029 ◽

Cited By ~ 1

Author(s):

James A Birchler ◽

Reiner A Veitia

Keyword(s):

Gene Expression ◽

Gene Flow ◽

Interspecific Hybrids ◽

Molecular Complexes ◽

Species Hybrid ◽

Genomic Imbalance ◽

Macromolecular Complexes ◽

Relationship Of ◽

Signaling Components

The role of genomic balance in accumulating species hybrid incompatibilities is discussed. Aneuploidy has been shown to produce more global modulations than polyploidy with the responsible genes being transcription factors and signaling components involved in molecular complexes, illustrating a stoichiometric component to gene expression. Genomic imbalance is usually detrimental to the organism and in many cases results in lethality. Here, it is proposed that once gene flow is prevented between or within populations by various speciation initiating processes, the stoichiometric relationship of members of macromolecular complexes can change via compensatory drift with the eventual result of newly established functional balances. However, when these new relationships are brought together in interspecific hybrids, detrimental consequences will occur. We suggest that these detrimental interactions contribute to hybrid incompatibilities.

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Genetic Diversity and Relationship of China’s Bergenia Germplasm Revealed by Intersimple Sequence Repeat Markers

Journal of the American Society for Horticultural Science ◽

10.21273/jashs05032-20 ◽

2021 ◽

pp. 1-7

Author(s):

Xiuli Lv ◽

Yuan Guan ◽

Jian Wang ◽

Yanwei Zhou ◽

Qunlu Liu ◽

...

Keyword(s):

Genetic Diversity ◽

Cluster Analysis ◽

Phylogenetic Relationship ◽

Theoretical Basis ◽

Genetic Relationships ◽

Issr Markers ◽

Similarity Coefficient ◽

Sequence Repeat ◽

Relationship Of ◽

Selection Of

To reveal the genetic diversity and genetic relationships of China’s Bergenia germplasm, 28 Bergenia accessions from different regions in China were analyzed by 24 intersimple sequence repeat (ISSR) markers. The results showed that 318 sites were amplified in all germplasm, including 307 polymorphic sites, and the percentage of polymorphic sites was 96.54%. Cluster analysis showed that the 28 accessions were divided into three categories, with a similarity coefficient of 0.5475. Bergenia purpurascens was clustered into one category; B. scopulosa was clustered into one category; and B. tianquaninsis, B. emeiensis, B. stracheyi, and B. crassifolia were clustered into one category. The results of the cluster analysis indicated that the 28 accessions were not completely classified by origin. Using the ISSR marker technique to analyze the phylogenetic relationship of Bergenia germplasm is helpful for identifying valuable resources and providing a theoretical basis for the selection of breeding parents.

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