The polyploid nature of Cenchrus ciliaris L. (Poaceae) has been overlooked: new insights for the conservation and invasion biology of this species – a review

Kharrat-Souissi, Amina; Šiljak-Yakovlev, Sonja; Brown, Spencer; Baumel, Alex; Torre, F. Jason; Chaïeb, Mohamed

doi:10.1071/rj13043

Cited by 17 publications

(9 citation statements)

References 118 publications

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“…De La Torre et al 2014;Griffin and Hoffmann 2014). Such a dynamic process of hybridization and polyploidy may also occur among different chromosomal races within a species as in the case of buffel grass, which is weedy and invasive in some areas of its current range and consists of different polyploids that vary in their environmental distributions and invasiveness (Kharrat-Souissi et al 2014).…”

Section: Colonization and Establishment: Hybridization And Polyploidymentioning

confidence: 99%

Biological invasions, climate change and genomics

Chown

Hodgins

Griffin

et al. 2014

Evolutionary Applications

223

214

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The rate of biological invasions is expected to increase as the effects of climate change on biological communities become widespread. Climate change enhances habitat disturbance which facilitates the establishment of invasive species, which in turn provides opportunities for hybridization and introgression. These effects influence local biodiversity that can be tracked through genetic and genomic approaches. Metabarcoding and metagenomic approaches provide a way of monitoring some types of communities under climate change for the appearance of invasives. Introgression and hybridization can be followed by the analysis of entire genomes so that rapidly changing areas of the genome are identified and instances of genetic pollution monitored. Genomic markers enable accurate tracking of invasive species’ geographic origin well beyond what was previously possible. New genomic tools are promoting fresh insights into classic questions about invading organisms under climate change, such as the role of genetic variation, local adaptation and climate pre-adaptation in successful invasions. These tools are providing managers with often more effective means to identify potential threats, improve surveillance and assess impacts on communities. We provide a framework for the application of genomic techniques within a management context and also indicate some important limitations in what can be achieved.

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Section: Colonization and Establishment: Hybridization And Polyploidymentioning

confidence: 99%

Biological invasions, climate change and genomics

Chown

Hodgins

Griffin

et al. 2014

Evolutionary Applications

223

214

View full text Add to dashboard Cite

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“…2f). It is also the most-studied species, with reviews being published by (as an environmental weed), Kharrat-Souissi et al (2014) (role of polyploidy) and Grice et al (2012) (the contentious nature of management as pasture or weed). Cenchrus ciliaris is widely and deliberately grown as a pasture plant in tropical and subtropical arid rangelands of the world, because of its high tolerance of drought and capacity to withstand heavy grazing (Fig.…”

Section: Known Impacts and Their Value Judgementmentioning

confidence: 99%

The Evolution, Physiology and Ecology of the Australian Arid-Zone Frog Fauna

Roberts

Edwards

2018

On the Ecology of Australia’s Arid Zone

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the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilms or in any other physical way, and transmission or information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed. The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. The publisher, the authors, and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher nor the authors or the editors give a warranty, express or implied, with respect to the material contained herein or for any errors or omissions that may have been made. The publisher remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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“…Pennisetum ciliare ) is an apomictic, allotetraploid perennial C 4 grass native to tropical and subtropical arid regions of Africa and Western Asia. Predominantly distributed in warmer tropical regions, C. ciliaris grows in a range of harsh conditions (Marshall et al, 2012; Kharrat-Souissi et al, 2013, 2014). Cenchrus species are the predominant pasture grasses in India due to their high fodder value (Meena and Nagar, 2019).…”

Section: Introductionmentioning

confidence: 99%

The repetitive DNA sequence landscape and DNA methylation in chromosomes of an apomictic tropical forage grass,Cenchrus ciliaris

Rathore

Schwarzacher

Heslop-Harrison

et al. 2022

Preprint

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Cenchrus ciliaris is an apomictic, allotetraploid pasture grass widely distributed in tropical and subtropical regions of Africa and Asia. In this work, we aim to investigate the genomic organization and characterize the nature of repetitive DNA sequences in this species. Because of the apomictic propagation, various aneuploid genotypes are found and we analysed here a 2n=4×+3=39 accession. The physical mapping of Ty1-copia and Ty3-gypsy retroelements through fluorescence in situ hybridization with global assessment of 5-methylcytosine DNA methylation through immunostaining revealed the genome-wide distribution pattern of retroelements and their association with DNA methylation. About a third of Ty1-copia sites overlapped or spanned centromeric DAPI positive heterochromatin, while the centromeric regions and arms of some chromosomes were labeled with Ty3-gypsy. Most of the retroelement sites overlapped with 5-methycytosine signals, except some Ty3-gypsy on the arms of chromosomes which did not overlap with anti-5-mC signals. Universal retrotransposon probes did not distinguish genomes of C. ciliaris showing signals in pericentromeric regions of all 39 chromosomes, unlike highly abundant repetitive DNA motifs found in survey genome sequences of C. ciliaris using graph-based clustering. Probes developed from RepeatExplorer clusters gave strong signals mostly in pericentromeric regions of about half of the chromosomes, and we suggested that they differentiate the two ancestral genomes in the allotetraploid C. ciliaris likely having different repeat sequence variants amplified before the genome came together in the tetraploid.

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The polyploid nature of Cenchrus ciliaris L. (Poaceae) has been overlooked: new insights for the conservation and invasion biology of this species – a review

Cited by 17 publications

References 118 publications

Biological invasions, climate change and genomics

Biological invasions, climate change and genomics

The Evolution, Physiology and Ecology of the Australian Arid-Zone Frog Fauna

The repetitive DNA sequence landscape and DNA methylation in chromosomes of an apomictic tropical forage grass,Cenchrus ciliaris

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