Phylogeny of Linearia and Notata groups of Paspalum L. (Poaceae, Panicoideae, Paniceae) and related species

Essi, Liliana; Souza-Chies, Tatiana T.

doi:10.1007/s10722-006-9148-7

Cited by 12 publications

(10 citation statements)

References 39 publications

(34 reference statements)

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“…The most frequent ploidy level among these collections was tetraploidy, and all counts agree with previous reports (Davidse and Pohl 1972, 1974, 1978Honfi et al 1990;Norrmann et al 1994a;Hunziker et al 1998;Pagliarini et al 2001;Urbani et al 2002;Adamowski et al 2005;Morrone et al 2006;Souza-Chies et al 2006;Essi and Souza-Chies 2007;Pozzobon et al 2000Pozzobon et al , 2008 and references therein) (Figs. 1j-l, 2m-n).…”

Section: Tetraploidssupporting

confidence: 91%

Chromosome numbers and ploidy levels of Paspalum species from subtropical South America (Poaceae)

Hojsgaard

Honfi

Rua

et al. 2008

Genet Resour Crop Evol

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Somatic chromosome numbers of 131 accessions belonging to 55 Paspalum species from subtropical South America have been determined. All species had x = 10 as a basic chromosome number, except P. almum which had x = 6. Six ploidy levels were found among species with tetraploidy as the most frequent condition. New diploid and octoploid counts were reported. For Paspalum lilloi and P. glabrinode (both 2n = 2x = 20), and for P. ellipticum, P. erianthoides, P. ovale and P. remotum (all 2n = 8x = 80) sporophytic chromosome numbers are presented for the first time. Records that differ from previously reported counts are given for the following species: P. paucifolium (2n = 2x = 20), P. ceresia (2n = 6x = 60), P. conjugatum (2n = 6x = 60), P. alcalinum (2n = 6x = 60) and P. aff. arundinellum (2n ? 1 = 5x ? 1 = 51). These chromosome data are discussed in light of ploidy-level variation and implications for breeding systems within and among species.

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Section: Tetraploidssupporting

confidence: 91%

Chromosome numbers and ploidy levels of Paspalum species from subtropical South America (Poaceae)

Hojsgaard

Honfi

Rua

et al. 2008

Genet Resour Crop Evol

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“…notatum and P . subciliatum [99-101] (these species form a monophyletic clade). Moreover, whether P .…”

Section: Discussionmentioning

confidence: 99%

Genetic variation in polyploid forage grass: Assessing the molecular genetic variability in the Paspalumgenus

et al. 2013

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BackgroundPaspalum (Poaceae) is an important genus of the tribe Paniceae, which includes several species of economic importance for foraging, turf and ornamental purposes, and has a complex taxonomical classification. Because of the widespread interest in several species of this genus, many accessions have been conserved in germplasm banks and distributed throughout various countries around the world, mainly for the purposes of cultivar development and cytogenetic studies. Correct identification of germplasms and quantification of their variability are necessary for the proper development of conservation and breeding programs. Evaluation of microsatellite markers in different species of Paspalum conserved in a germplasm bank allowed assessment of the genetic differences among them and assisted in their proper botanical classification.ResultsSeventeen new polymorphic microsatellites were developed for Paspalum atratum Swallen and Paspalum notatum Flüggé, twelve of which were transferred to 35 Paspalum species and used to evaluate their variability. Variable degrees of polymorphism were observed within the species. Based on distance-based methods and a Bayesian clustering approach, the accessions were divided into three main species groups, two of which corresponded to the previously described Plicatula and Notata Paspalum groups. In more accurate analyses of P. notatum accessions, the genetic variation that was evaluated used thirty simple sequence repeat (SSR) loci and revealed seven distinct genetic groups and a correspondence of these groups to the three botanical varieties of the species (P. notatum var. notatum, P. notatum var. saurae and P. notatum var. latiflorum).ConclusionsThe molecular genetic approach employed in this study was able to distinguish many of the different taxa examined, except for species that belong to the Plicatula group, which has historically been recognized as a highly complex group. Our molecular genetic approach represents a valuable tool for species identification in the initial assessment of germplasm as well as for characterization, conservation and successful species hybridization.

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“…Considerable taxonomic efforts have been devoted to the genus Paspalum, especially regarding infrageneric classification (Rua et al, 2010). Current phylogenetic analyses using morphological and/or genetic data have better clarified relationships within the genus (Denham et al, 2002;Souza-Chies et al, 2006;Denham and Zuloaga, 2007;Essi and Souza-Chies, 2007). However, the molecular relationships did not reflect morphological data as only the subgenus Anachyris formed a well-supported clade (Denham and Zuloaga, 2007;Rua et al, 2010).…”

Section: Paspalum Agamic Complexesmentioning

confidence: 99%

Harnessing apomictic reproduction in grasses: what we have learned from Paspalum

et al. 2013

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In this article, the available literature characterizing apomixis in Paspalum spp. and its use in breeding is critically reviewed. In particular, a comparison is made across species of the structure and function of the genomic region controlling apomixis in order to identify a common core region shared by all apomictic Paspalum species and where apomixis genes are likely to be localized. Candidate genes are discussed, either as possible genetic determinants (including homologs to signal transduction and RNA methylation genes) or as downstream factors (such as cell-to-cell signalling and auxin response genes) depending, respectively, on their co-segregation with apomixis or less. Strategies to validate the role of candidate genes in apomictic process are also discussed, with special emphasis on plant transformation in natural apomictic species.

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Phylogeny of Linearia and Notata groups of Paspalum L. (Poaceae, Panicoideae, Paniceae) and related species

Cited by 12 publications

References 39 publications

Chromosome numbers and ploidy levels of Paspalum species from subtropical South America (Poaceae)

Chromosome numbers and ploidy levels of Paspalum species from subtropical South America (Poaceae)

Genetic variation in polyploid forage grass: Assessing the molecular genetic variability in the Paspalumgenus

Harnessing apomictic reproduction in grasses: what we have learned from Paspalum

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