Novos biótipos pentaplóides do grupo Dilatata de Paspalum L. (Gramineae) no Sul do Brasil

Machado, Ana Caroline de Carvalho; Valls, J. F. M.; Peñaloza, Andréa del Pilar de Souza; Santos, Sileuza dos

doi:10.1590/s0103-84782005000100009

Cited by 12 publications

(7 citation statements)

References 8 publications

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“…A cladistic treatment of the species belonging to the Dilatata group is especially problematic because they are allopolyploids (Burson, 1991a, Souza-Chies & Cavalli-Molina, 1995, Casa et al, 2002, Machado et al, 2005, thus their evolutionary history includes at least a reticulation event.…”

Section: The Dilatata Groupmentioning

confidence: 99%

A Preliminary Approach to the Phylogeny of the Genus Paspalum (Poaceae)

et al. 2006

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The present work intends to clarify the phylogenetic relationships among the species of Paspalum L. belonging to the informal groups Notata/Linearia and Dilatata, and to raise some preliminary hypotheses on the phylogeny of the genus as a whole. A combined dataset including morphological and molecular characters was used to analyze 28 species of Paspalum plus some representatives of related genera of the tribe Paniceae. Analyses were performed using both parsimony and maximum likelihood. The monophyly of Paspalum is not supported nor contradicted. The circumscription of informal groups of Paspalum is discussed, as well as the cladistic treatment of allopolyploid taxa, especially those comprising the Dilatata group. The relationships of members of the Dilatata with their putative progenitors is confirmed, but the monophyly of the group as a whole is not. A close relationship between P. dilatatum Poir. and P. lividum Trin. ex Schltdl. is shown. Our analysis is consistent with the monophyly of a group comprising Notata+Linearia, with a monophyletic Notata group nested within it. The delimitation of the core Notata is proposed by including P. conduplicatum Canto-Dorow, Valls and Longhi-Wagner, P. notatum Flüggé, P. minus E. Fourn., P. pumilum Nees and P. subciliatum Chase.

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Section: The Dilatata Groupmentioning

confidence: 99%

A Preliminary Approach to the Phylogeny of the Genus Paspalum (Poaceae)

et al. 2006

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“…Paspalum distichum is 3 nerved, P. scrobiculatum is 5–7 nerved, and P. dilatatum is 5–9 nerved. Machado, Valls, Penaloza, and Santos (2005) concluded that the relative length of lower lemma and upper lemma is also of taxonomic importance, but precise measurement must be made. The lemma is ovate in P. dilatatum and P. distichum whereas P. scrobiculatum possesses elliptic or orbicular lemma (Table 4).…”

Section: Resultsmentioning

confidence: 99%

Morphological and palynological assessment of taxonomically problematic genus Paspalum based on light and scanning electron microscopy

Shaheen

Khan

Shahid

et al. 2021

Microscopy Res & Technique

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Present research work was carried out to clarify the variations among species of genus Paspalum morphologically and palynologically as this genus is taxonomically difficult due to having multiple similar morphologically overlapping characters which make it difficult to identify. Henceforth present research work was carried out to delimit taxa within the same genus by morphological and palynological tools through light microscopy (LM) and scanning electron microscopy (SEM). Both these tools are considered as the most useful taxonomic characters for taxonomically problematic genera. The results showed a lot of variations among morphological characters. In Paspalum dilatatum, the upper glume was ovate whereas in the other two species, the upper glume was elliptic. The upper glume apex found in P. dilatatum and Paspalum scrobiculatum was obtuse whereas in Paspalum distichum, upper glume apex was acute. Glume nerves showed variation in all three species. Paspalum distichum was 3 nerved, P. scrobiculatum was 5–7 nerved, and P. dilatatum was 5–9 nerved. All three species showed variation in lemma nerves. Paspalum scrobiculatum had 3 nerved lemma whereas in P. distichum 3–5 nerved and P. dilatatum 5–9 nerved lemma were present. In polar and equatorial view, pollen grains ranged from 25 (20–30) to 37.5 (30–45) μm. Paspalum distichum appeared to be the smallest in size whereas P. dilatatum was the largest. Exine thickness ranged from 0.75 (0.5–1) to 1.35 (1.2–1.5) μm. The higher value of pollen fertility was found in P. scrobiculatum as 87.69% and the lowest value was in P. distichum as 78.08%. Morphological keys were also given for correct identification.

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“…and Paspalum L., respectively. Moreover, it must be taken into account that Panicoideae includes genera of great importance for natural pastures, most notably Paspalum, which has been the subject of multidisciplinary studies aimed at its commercial use (Quarín et al 1997;Casa et al 2002;Souza-Chies et al 2005;Machado et al 2005;Miz & Souza-Chies 2006;Pozzobon et al 2008).…”

Section: Classification In Subfamilies and Its Relationship With Morpmentioning

confidence: 99%

Poaceae: an overview with reference to Brazil

Longhi-Wagner

2012

Rodriguésia

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Novos biótipos pentaplóides do grupo Dilatata de Paspalum L. (Gramineae) no Sul do Brasil

Abstract: RESUMO Paspalum dilatatum é uma gramínea nativa da América do Sul subtropical, com bom valor forrageiro e ampla variabilidade intraespecífica. Distintos tipos morfológicos between "Virasoro" (4x, sexual) and "Uruguaiana" (6x, apomitic)

Cited by 12 publications

References 8 publications

A Preliminary Approach to the Phylogeny of the Genus Paspalum (Poaceae)

A Preliminary Approach to the Phylogeny of the Genus Paspalum (Poaceae)

Morphological and palynological assessment of taxonomically problematic genus Paspalum based on light and scanning electron microscopy

Poaceae: an overview with reference to Brazil

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