IAPT chromosome data 31

Marhold, Karol; Kučera, Jaromír; Aguiar-Melo, Camila; Almeida, Erton Mendonça de; Alves, Lânia Isis Ferreira; Pankova, Tatyana V.; Bered, Fernanda; Bonifácio, Kallyne Machado; Carvalho, Luana Crestani de; Chiarini, Franco Ezequiel; Cordeiro, Joel Maciel Pereira; Costea, Mihai; Daviña, Julio Rubén; Ebel, Aleksandr L.; Falconi-Souto, Allan; Félix, Leonardo P.; Fernández, Amparo Ygual; García, Miguel Ángel; Ruiz, Ignacio García; Gil, André dos Santos Bragança; Guerra, Marcelo; Hirsch, Luiza Domingues; Honfi, Ana Isabel; Kaltchuk-Santos, Eliane; Knapp, Sandra; Kumar, Rohit; Kumari, Vandna; Lovo, Juliana; Lucena, Reinaldo Farias Paiva de; Medeiros-Neto, Enoque; Moraes, Ana Paula; García, Miguel A.; Neves, José Anael; Nollet, Felipe; Oliveira, Regina Célia de; Orejuela, Andrés; Pozzobon, Marisa Toniolo; Reutemann, Anna Verena; Ribeiro, André Rodolfo de Oliveira; Rua, Gabriel Hugo; Santos, Angeline M.S.; Silva, Anádria Stéphanie da; Silva, Rosemere; Silva, Ronimeire Tôrres da; Singhal, Vijay Kumar; Souza-Chies, Tatiana T.; Stefanović, Saša; Valls, José Francisco Montenegro; Welker, Cassiano Aimberê Dorneles; Zykova, Elena Yu.

doi:10.1002/tax.12176

Cited by 11 publications

(4 citation statements)

References 98 publications

(126 reference statements)

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“…Seeds 3-4 per capsule, 1.12-1.54 × 0.9-1.1 mm, subrotund to broadly elliptic, hilum 0.45-0.5 mm in diameter, vascular scar 0.085-0.01 mm long. 2n = 56 (Fogelberg 1938;García et al 2019). GeoGrAphicAl diStriBUtion: Although it has not been collected from all the Chilean administrative regions, its presence is possible in all these areas except perhaps in the regions of Aisén and Magallanes.…”

Section: Resultsmentioning

confidence: 99%

Taxonomic revision of Cuscuta (Convolvulaceae) in Chile

Costea

Teillier

2022

Gayana Bot.

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Parasitic plant genus Cuscuta is important both economically and ecologically. This study is the result of more than fifteen years of herbarium and field studies in preparation for the floristic account of the genus in Nueva Flora de Chile. Eleven species that belong to three sections of subgenus Grammica were confirmed from Chile. Two historically reported species, C. epithymum and C. grandiflora, were not corroborated by the existing evidence. An identification key, typification, detailed descriptions and illustrations were provided to facilitate the identification of species, and their taxonomy was discussed, outlining remaining problems. Geographical distribution, ecology and host range of species were detailed. Results strongly suggested that several species are likely rare (e.g., C. andina, C. rustica, C. pauciflora) or even extinct (C. werdermannii), emphasizing the need for concerted efforts to locate these species in the wild and establish their conservation status.

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Section: Resultsmentioning

confidence: 99%

Taxonomic revision of Cuscuta (Convolvulaceae) in Chile

Costea

Teillier

2022

Gayana Bot.

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“…: 2n = 18, 20, 22, 24, 28, 42, 44, 46, 48. -A. brandisii (Mez) Z.L.Wu: n = 12: Kumari & al. (2019) as Stipa brandisii Mez.…”

Section: Appendixmentioning

confidence: 99%

Molecular phylogenetics and micromorphology of Australasian Stipeae (Poaceae), and the interrelation of whole-genome duplication and evolutionary radiations in this grass tribe

Tkach

Nobis

Schneider

et al. 2020

Preprint

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The mainly Australian grass genus Austrostipa with ca. 64 species represents a remarkable example of an evolutionary radiation. To investigate aspects of diversification, macro-and micromorphological variation in this genus we conducted a molecular phylogenetic and scanning electron microscopy (SEM) analysis including representatives from all of its accepted subgenera.Plastid DNA variation within Austrostipa was low and only few lineages were resolved. Nuclear ITS and Acc1 yielded comparable groupings of taxa and resolved subgenera Arbuscula, Petaurista, Bambusina in a common clade and as monophyletic. In summary, we suggest recognizing nine subgenera in Austrostipa.Because of its taxonomic significance in Stipeae, we studied the lemma epidermal structure in 34 representatives of Austrostipa. In most species, the lemma epidermal pattern (LEP) was relatively uniform (maize-like LEP), but in six species it was more similar to that of Stipa s.str., Neotrinia, Ptilagrostis and Orthoraphium. The species representing subgenera Lobatae, Petaurista, Bambusina and A. muelleri from subg. Tuberculatae were well-separated from all the other species included in the analysis.Two different sequence copies of Acc1 were found in polyploid Austrostipa and Anemanthele. Each of the copy types formed a single clade. This was also true of the sampled species of Stipa s.str., but their clades were strongly separated from those of Austrostipa and Anemanthele. This underlines the statement of Tzvelev (1977) that most if not all contemporary Stipeae are of hybrid origin and demonstrates it for the first time unambiguously on the molecular level. Chromosome number variation is surveyed and reviewed for the whole tribe Stipeae and interpreted in a molecular phylogenetic framework. The rather coherent picture of chromosome number variation underlines the phylogenetic and evolutionary significance of this character. The closest extant relatives of Austrostipa and Anemanthele are in the clade of Achnatherum s.str., Celtica, Oloptum and Stipellula. These genera are most abundant in Central and Eastern Asia, which makes a colonization of Australian and New Zealand from this region more likely, perhaps via long-distance dispersal, than colonization of Australia from southern South America via Antarctica as previously invoked.

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“…200 parasitic species with subcosmopolitan distribution (Yuncker 1932; Costea et al 2015a) and great ecological (Press and Phoenix 2005) as well as economic significance (Lanini and Kogan 2005; Costea and Tardif 2006). The genus shows a remarkable cytogenetic variation, harboring both holocentric or monocentric chromosomes, karyotypes that vary from symmetrical to bimodal, as well as huge variations in the genome size (García and Castroviejo 2003; García et al 2019; Ibiapino et al 2022). This wide spectrum of cytogenetic traits within Cuscuta contributes to its adaptability and evolutionary success in diverse environments.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to diploids with 2 n = 30, subg. Grammica has polyploids, mostly with 2 n = 60, as well as the highest chromosome counts in the genus, for example 2 n = 90 in C. vandevenderi Costea & Stefanovićand 2 n = 150 in C. sandwichiana Choisy (García et al 2019; Ibiapino et al 2022). Accompanying this high variation in chromosome numbers, at least 14 cases of independent interspecific hybridization events have been reported in subg.…”

Section: Introductionmentioning

confidence: 99%

Cytogenetic comparison of Cuscuta psorothamnensis and C. veatchii (Convolvulaceae), two species originated from recurrent hybridization between the same diploid parents

Moura,

Urdampilleta,

Garcia

et al. 2024

Preprint

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Genus Cuscuta L. (Convolvulaceae) exhibits cases of hybridization and allopolyploidy. Section Denticulatae, subg. Grammica, includes four species: the allopolyploids, C. veatchii and C. psorothamnensis (2n = 60), which originated from two independent reticulation events between the diploids, C. denticulata and C. nevadensis (2n = 30). The allopolyploids are morphologically similar, but are differing in their geographical distribution and host specificity. While cytogenetic data have been reported for C. veatchii, this study aims to provide a comparative analysis with C. psorothamnensis. To characterize the chromosomal complement of C. psorothamnensis and compare it with C. veatchii, we used CMA/DAPI banding, FISH, and GISH. The karyotypes of both species displayed similarity in chromosome number, size, and symmetry, and interphase nucleus organization. Both species exhibited a pair of 5S and 35S rDNA sites adjacent on the same chromosome. The number of 5S rDNA sites in C. psorothamnensis is variable, with some individuals displaying four, five, and six sites. Our results show: 1) the chromosomal pair carrying adjacent 5S and 35S rDNA in C. denticulata is retained in the polyploids; 2) the loss of C. nevadensis rDNA sites occurred in both tetraploids; 3) C. psorothamnensis and C. veatchii are allopolyploids part of a species complex, originated from successive independent hybridization events between C. denticulata and C. nevadensis; and 4) C. psorothamnensis is probably more recent in origin than C. veatchii based on the degree of diploidization. This cytogenetic comparison allows us to understand the processes involved in the emergence of new polyploid species by hybridization.

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IAPT chromosome data 31

Abstract: All materials CHN.

Cited by 11 publications

References 98 publications

Taxonomic revision of Cuscuta (Convolvulaceae) in Chile

Taxonomic revision of Cuscuta (Convolvulaceae) in Chile

Molecular phylogenetics and micromorphology of Australasian Stipeae (Poaceae), and the interrelation of whole-genome duplication and evolutionary radiations in this grass tribe

Cytogenetic comparison of Cuscuta psorothamnensis and C. veatchii (Convolvulaceae), two species originated from recurrent hybridization between the same diploid parents

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