Phylogenetic relationships and genetic diversity among members of theFestuca-Lolium complex (Poaceae) based on ITS sequence data

Gaut, Brandon S.; Tredway, Lane P.; Kubik, Christine; Gaut, Rebecca L.; Meyer, William A.

doi:10.1007/bf00985265

Cited by 69 publications

(61 citation statements)

References 43 publications

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“…Examples of these factors are reticulation and lineage sorting (Soreng and Davis 2000;Catalán et al 2004), along with other undesirable effects such as the existence of potential paralogues of ITS (Gaut et al 2000;Torrecilla et al 2004) and significant heterogeneity in nucleotide substitution rates , or potential effects related to chloroplast capture and phenotypic plasticity (Kellogg and Watson 1993;MasonGamer and Kellogg 1997;Catalán et al 2004). These con-founding factors may have altered the reconstruction of relationships among some festucoid lineages.…”

Section: Discussionmentioning

confidence: 99%

“…A series of molecular phylogenetic studies of Festuca and its closest relatives (Darbyshire and Warwick 1992;Charmet et al 1997;Gaut et al 2000;Torrecilla and Catalán 2002;Torrecilla et al 2003Torrecilla et al , 2004Catalán et al 2004) demonstrated that Festuca s.l. is a large paraphyletic assemblage that encompasses not only Lolium and Vulpia, but also a number of other genera.…”

Section: Introductionmentioning

confidence: 99%

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A Systematic Approach to Subtribe Loliinae (Poaceae: Pooideae) Based on Phylogenetic Evidence

Catalán¹,

Torrecilla²,

López-Rodríguez³

et al. 2007

aliso

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Loliinae (Poaceae, Pooideae) encompass a large group of genera closely related to Festuca, the largest genus in the subtribe, which as traditionally circumscribed has been shown to be highly paraphyletic. In this investigation we combined molecular and morphological data representing 20 genera of Loliinae and closely related subtribes. Combined analysis of nucleotide sequences from the nuclear ITS and chloroplast trnL-F regions and structural characters recovered a consensus topology that shows Loliinae to be monophyletic and possessing two main clades-the fine-leaved Festuca clade that includes Ctenopsis, Micropyrum, Narduroides, Psilurus, Vulpia, and Wangenheimia, and the broad-leaved Festuca clade that includes Lolium and Micropyropsis. The presence of morphologically intermediate, unresolved, or poorly supported taxa (Castellia, Festuca subgen. Subulatae and subgen. Leucopoa p. p., and Festuca sect. Amphigenes p. p.) among the two groups points to a potential evolutionary trend from ancestral broad-leaved taxa to the more recently evolved fine-leaved taxa. Alternate classifications are evaluated for subtribes Loliinae, Cynosurinae, Dactylidinae, and Parapholiinae. We propose to maintain a paraphyletic Festuca as presently circumscribed and not to divide the polyphyletic Vulpia and Festuca infrageneric taxa until more phylogenetic data become available.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Systematic Approach to Subtribe Loliinae (Poaceae: Pooideae) Based on Phylogenetic Evidence

Catalán¹,

Torrecilla²,

López-Rodríguez³

et al. 2007

aliso

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“…Notwithstanding slight controversies, the previous results of some studies consistently support the notion that the genus Lolium can be divided into two groups based on reproduction mode: one for the cross-breeding species and another for the remaining inbreeding species (Charmet and Balfourier, 1994;Stammers et al, 1995;Charmet et al, 1997;Gaut et al, 2000;Polok et al, 2006). As Lolium is believed to be of extremely recent origin, its phylogeny has not been resolved with certainty (Gaut et al, 2000).…”

Section: Introductionmentioning

confidence: 73%

“…As Lolium is believed to be of extremely recent origin, its phylogeny has not been resolved with certainty (Gaut et al, 2000). This contributes greatly to the ambiguity of the taxonomic classification of the genus.…”

Section: Introductionmentioning

confidence: 99%

Genetic relationships between Lolium (Poaceae) species revealed by RAPD markers

Gu²,

Chen³

et al. 2013

Genet. Mol. Res.

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ABSTRACT. The genus Lolium is one of the most important groupings of temperate forage grasses, including about eight recognized species that are native to some temperate and subtropical regions of the northern hemisphere. We examined genetic relationships among 18 accessions representing all Lolium species using RAPD markers. Among 50 random primers that we screened, 13 gave reproducible amplification banding patterns. Each of these 13 primers generated 19-43 scorable fragments. A total of 367 RAPD fragments were detected, of which 95.9% were polymorphic across all the Lolium accessions. Dice's coefficient of dissimilarity ranged from 0.016 to 0.622, which is indicative of substantial genetic variations in these Lolium accessions. A neighbor-joining cluster analysis, with bootstrap permutation, produced an unrooted dendrogram, which grouped 18 accessions into two main clades, supporting high bootstrap values (98 and 96% The value of r = 0.97 in the Mantel test for cophenetic correlation applied to the cluster analysis indicated the high degree of fit of the accessions to a group. A principal coordinate analysis, whose first three coordinates explained 72.6% of the variation, showed similar groupings as in the cluster analysis. The genetic relationships estimated by the polymorphism of RAPD markers are basically in agreement with those previously inferred with other genetic markers.

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“…Previous methods include chloroplast DNA (cpDNA) electrophoresis (Lehväslaiho et al, 1987;Soreng et al, 1990;Darbyshire and Warwick, 1992), RAPD (random amplification of polymorphic DNA) technology (Stammers et al, 1995;Wiesner et al, 1995), ITS (internal transcribe spacer) sequences of nuclear rDNA (Charmet et al, 1997;Gaut et al, 2000;Torrecilla and Catalán, 2002), and sequences of chloroplast trnL-F region Torrecilla et al, 2004). Despite the large genomic resources available for most intensively cultivated species of the Festuca-Lolium complex, conjoined analyses with chloroplast spacers as well as chloroplast genes have not been employed for the analysis of phylogeny among the Festuca-Lolium complex.…”

Section: Introductionmentioning

confidence: 99%

Phylogenetic Relationships in the Festuca-Lolium Complex (Loliinae; Poaceae): New Insights from Chloroplast Sequences

et al. 2016

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The species within the Lolium/Festuca grass complex have dispersed and colonized large areas of temperate global grasslands both naturally and by human intervention. The species within this grass complex represent some of the most important grass species both for amenity and agricultural use worldwide. There has been renewed interest by grass breeders in producing hybrid combinations between these species and several countries now market Festulolium varieties as a combination of genes from both genera. The two genera have been differentiated by their inflorescence structure, but controversy has surrounded the taxonomic classification of the Lolium-Festuca complex species for several decades. In order to better understand the complexities within the Lolium/Festuca complex and their genetic background, the phylogeny of important examplers from the Lolium-Festuca complex were reconstructed. In total 40 taxa representing the Festuca and Lolium species with Vulpia myuros and Brachypodium distachyon as outgroups were sampled, using two non-coding intergenic spacers (trnQ-rps16, trnH-psbA) and one coding gene (rbcL). Maximum parsimony (MP), Bayesian inference (BI) analyses based on each partition and combined plastid DNA dataset, and median-jointing network analysis were employed. The outcomes strongly suggested that the subgen. Schedonorus has a close relationship to Lolium, and it is also proposed to move the sect. Leucopoa from subgen. Leucopoa to Subgen. Schedonorus and to separate sect. Breviaristatae from the subgen. Leucopoa. We found that F. californica could be a lineage of hybrid origin because of its intermediate placement between the "broad-leaved" and "fine-leaved" clade.

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Phylogenetic relationships and genetic diversity among members of theFestuca-Lolium complex (Poaceae) based on ITS sequence data

Cited by 69 publications

References 43 publications

A Systematic Approach to Subtribe Loliinae (Poaceae: Pooideae) Based on Phylogenetic Evidence

A Systematic Approach to Subtribe Loliinae (Poaceae: Pooideae) Based on Phylogenetic Evidence

Genetic relationships between Lolium (Poaceae) species revealed by RAPD markers

Phylogenetic Relationships in the Festuca-Lolium Complex (Loliinae; Poaceae): New Insights from Chloroplast Sequences

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