Genotypic diversity among pasture and roadside populations of the invasive buffelgrass (Pennisetum ciliare L. Link) in north-western Mexico

Gutierrez-Ozuna, R.; Eguiarte, Luis E.; Molina‐Freaner, Francisco

doi:10.1016/j.jaridenv.2008.09.007

Cited by 25 publications

(15 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This latter author surmised that the low level of genetic variation of Saudi (Al-Qassim) C. ciliaris populations was not surprising given the presumed predominantly apomictic reproductive system of this species. The mean G/N value (the proportion of distinct genotypes in a population) observed for C. ciliaris in Tunisia (G/N = 0.55; Kharrat-Souissi et al 2011) was also higher than that observed for invasive Mexican populations (G/N = 0.29, Gutierrez-Ozuna et al 2009). …”

Section: Molecular Diversitymentioning

confidence: 59%

“…The groups of genotypes from the neighbour-joining tree do not correspond completely to the geographical origin of samples (KharratSouissi et al 2011). Gutierrez-Ozuna et al (2009) also showed, in north-western Mexican populations of C. ciliaris, that genetic differentiation had no geographic pattern and apparently was not associated with environmental gradients. The lack of geographical structure of genotypic diversity of C. ciliaris could be attributed to the dispersal capacity of seeds by wind over a long distance (Pitt 2004).…”

Section: Molecular Diversitymentioning

confidence: 92%

“…The lack of geographical structure of genotypic diversity of C. ciliaris could be attributed to the dispersal capacity of seeds by wind over a long distance (Pitt 2004). Gutierrez-Ozuna et al (2009) concluded that invasion success of C. ciliaris in north-western Mexico is not directly related to genotypic variation and other factors, such as phenotypic plasticity and propagule pressure, could be major determinants of the invasion success of this species.…”

Section: Molecular Diversitymentioning

confidence: 99%

“…Due to the polyploidy nature of C. ciliaris and their relatively low cost, AFLP markers were developed to investigate the structure of variation at several loci among and within 11 Tunisian populations and among the three ploidy levels of C. ciliaris (Kharrat-Souissi et al 2011). In other regions of the world (north-western Mexico, Pakistan, central Saudi Arabia), genotypic diversity of C. ciliaris has been studied (Gutierrez-Ozuna et al 2009;Nisar et al 2010; Al-Soqeer 2011) unfortunately without taking into account possible different ploidy levels. Although these authors sampled numerous individuals per population, they did not examine individuals descending from the same mother plants, and thus failed to investigate the frequency of sexual reproduction within C. ciliaris.…”

Section: Molecular Diversitymentioning

confidence: 99%

See 3 more Smart Citations

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

et al. 2014

View full text Add to dashboard Cite

Abstract. Climate change, associated with increased aridity, and high grazing pressure by livestock results in the scarcity and loss of perennial Poaceae in arid ecosystems. The species threatened by this include Cenchrus ciliaris L., a native perennial grass of the tropical and sub-tropical arid rangelands of Africa and Western Asia and now introduced in Central and South America, and Australia. This species reproduces predominantly through aposporous apomixis although sexual individuals have been occasionally identified. Cenchrus ciliaris is characterised by a significant, heritable, phenotypic polymorphism and three ploidy levels including tetraploids (2n = 4x = 36), pentaploids (2n = 5x = 45) and hexaploids (2n = 6x = 54). Under water-deficit conditions, C. ciliaris shows plasticity in growth characteristics and aboveground biomass. This phenotypic plasticity has led to the identification of genotypic-associated responses conferring more productivity. This underlines the importance of conserving the genetic diversity of C. ciliaris in order to ensure the persistence of the vegetation cover in the arid ecosystems in which it occurs. Observations from cytogenetic and molecular data converge to underline the possibility of sexual reproduction, recombination and gene flow within and between populations of C. ciliaris. Genetic mechanisms, such as polyploidy, hybridisation between ploidy levels and apomixes, are generating and then maintaining the diversity of C. ciliaris. This review emphasises the role of polyploidy in the evolutionary development of C. ciliaris and how it may be a crucial factor for its conservation in some countries and its weedy nature in others.

show abstract

Section: Molecular Diversitymentioning

confidence: 59%

Section: Molecular Diversitymentioning

confidence: 92%

Section: Molecular Diversitymentioning

confidence: 99%

Section: Molecular Diversitymentioning

confidence: 99%

See 2 more Smart Citations

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

et al. 2014

View full text Add to dashboard Cite

show abstract

“…In addition, many invasive species (including R. phoenicolasius) are clonal and/or self-compatible (Liu et al 2006), which could also lead to a decrease in variation (Amsellem et al 2000). The lack of genetic diversity in clonal invasives was demonstrated using ISSRs and there is the possibility that characteristics other than genetic diversity facilitate the invasive success (Ye et al 2004;Poulin et al 2005;Sun et al 2005;Gutierrez-Ozunaa et al 2009). Most likely R. phoenicolasius has had a history of few introductions in the study sites.…”

Section: Discussionmentioning

confidence: 99%

Genetic diversity in the invasive Rubus phoenicolasius as compared to the native Rubus argutus using inter-simple sequence repeat (ISSR) markers

et al. 2011

View full text Add to dashboard Cite

Invasive species are one of most significant factors in human-influenced global change. Management actions that prevent the spread and impacts of invasive species require knowledge of their ecological and genetic characteristics. The genetic characteristics of the invasive wine raspberry, Rubus phoenicolasius Maxim. (Rosaceae) and the native sawtooth blackberry, Rubus argutus Link, were examined in two forest habitats on the Maryland Coastal Plain. Using inter-simple sequence repeat (ISSR) markers we quantified the genetic diversity of both species. We analyzed genetic diversity using analysis of molecular variance (AMOVA) and found less genetic diversity in the invasive species, R. phoenicolasius, with variation between sites was 0.418 between sites and 0.075 within sites as compared to the native, R. argutus, where the variation between sites was 1.538 and 0.370 within sites. The lower genetic diversity in the invasive may be due to a history of limited introductions or frequent self-fertilization and clonal reproduction.

show abstract

Kikuyugrass germplasm collections in the United States and Australia show low levels of genetic diversity as revealed by DArTseq genotyping

et al. 2020

View full text Add to dashboard Cite

Kikuyugrass [Cenchrus clandestinus (Hochst. ex Chiov.) Morrone (= Pennisetum clandestinum Hochst. ex Chiov.)] is a warm‐season grass native to Africa. It was introduced into the United States as forage in Hawaii and for erosion control in California. Kikuyugrass is considered invasive and currently is on the USDA's noxious weed list. Since complete eradication is difficult, it has become the primary species on several golf courses, athletic fields, and lawns. Kikuyugrass possesses exceptional quality with considerable cultural inputs, and little or no winter dormancy compared with other warm‐season turfgrasses. With breeding efforts directed specifically at reducing aggressiveness and improving texture, thus reducing inputs, it could become a valuable turf‐type species in coastal and inland California. The genetic diversity of kikuyugrass was investigated using single nucleotide polymorphism (SNP) and silicoDArT (presence or absence) markers revealed by the Diversity Arrays Technology sequencing (DArTseq) platform. Accessions were sampled throughout California, Hawaii, and Australia, both from natural stands and various collections. Among the 254 accessions tested, two distinct groups were discovered, and there was no geographic pattern to this differentiation. The overall level of SNP polymorphism was low (polymorphic information content [PIC] average = .33, PIC median = .38). Most (76%) of the observed genetic variation was within populations, whereas 24% was among populations. Average genetic distances within populations ranged from 0.09 to 0.16, whereas distances among populations ranged from 0.13 to 0.36. Accessions from Hawaii and Australia were the most diverse; however, a detectable level of genetic diversity of kikuyugrass also exists in California, mostly because of the past introductions from Australia.

show abstract

Genotypic diversity among pasture and roadside populations of the invasive buffelgrass (Pennisetum ciliare L. Link) in north-western Mexico

Cited by 25 publications

References 47 publications

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

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

Genetic diversity in the invasive Rubus phoenicolasius as compared to the native Rubus argutus using inter-simple sequence repeat (ISSR) markers

Kikuyugrass germplasm collections in the United States and Australia show low levels of genetic diversity as revealed by DArTseq genotyping

Contact Info

Product

Resources

About