Population genetic diversity and structure of Pilosocereus tillianus (Cactaceae, Cereeae), a columnar cactus endemic to the Venezuelan Andes

Figueredo, Carmen J.; Nassar, Jafet M.; García-Rivas, A.E.; González-Carcacía, José A.

doi:10.1016/j.jaridenv.2010.05.020

Cited by 21 publications

(17 citation statements)

References 34 publications

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Section: Introductionmentioning

confidence: 99%

“…Most species are distributed in two core regions: eastern and central Brazil, which harbour the highest species diversity, and Central America and the Caribbean islands (Taylor & Zappi, 2004;Zappi, 1994). As in other cacti genera, phylogeographic work has been limited to the study of patterns within species or closely related species complexes (Bonatelli et al, 2014;Figueredo, Nassar, García-Rivas, & González-Carcacía, 2010 Here, we increase the number of molecular markers (adding the plastid coding gene ycf1) and extend taxon sampling among outgroups outside Cereeae, and within Pilosocereus (from 33 to 38 species, 90% of total diversity), to generate a robust phylogeny, which is used as a template to estimate lineage divergence times, diversification rates, and historical migration events in the genus. We aimed to answer the following questions: Nyffeler and Eggli (2010) Appendix S1: Table S1.1 lists species names, voucher information, and geographic location for all samples.…”

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confidence: 99%

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Bayesian spatio‐temporal reconstruction reveals rapid diversification and Pleistocene range expansion in the widespread columnar cactus Pilosocereus

Lavor

Calvente

Versieux

et al. 2018

Journal of Biogeography

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Aim Pilosocereus is one of the richest and most widespread genera of columnar cacti, extending from south‐west USA to southern Brazil. Most species occur in the seasonally dry tropical forest biome but can also be found in xeric microhabitats inside woody savannas (Cerrado) and moist forests (Brazilian Atlantic forest). The genus exhibits a highly disjunct distribution across the Neotropics. Using a 90% complete species‐level phylogeny, we reconstructed the spatio‐temporal evolution of Pilosocereus to explore the historical factors behind the species richness of Neotropical dry formations. Location South America, Mesoamerica, Caribbean, south‐western North America. Taxon Genus Pilosocereus (Cactaceae, Cactoideae, Cereeae). Methods We used plastid and nuclear DNA sequences and Bayesian inference to estimate phylogenetic relationships and lineage divergence times. Ancestral ranges were inferred within the Pilosocereus subgenus Pilosocereus s. s. clade using the Dispersal–Extinction–Cladogenesis model in a Bayesian framework to account for parameter estimation uncertainty and the effect of geographical distance on dispersal rates. Results Pilosocereus was recovered as polyphyletic, with representatives of other Cereeae nested within. The Pilosocereus subgenus Pilosocereus s. s. clade originated around the Pliocene–Pleistocene transition (2.7 Ma), probably within the Caatinga seasonally dry tropical forest (SDTF) formation. Species divergences were dated in the Middle and Upper Pleistocene, often constrained to the same geographic region but also associated to migration events to other xeric habitats in Mesoamerica and northern South America; dispersal rates were not dependent on distance. Main conclusions Diversification dynamics in the Pilosocereus subgenus Pilosocereus s. s. clade agree with other infrageneric studies in cacti. Species divergence was rapid, driven by in situ diversification and migration events between SDTF dry formations and xeric microhabitats within other biomes and probably linked to Pleistocene climatic changes. This dynamic history differs from that found in woody SDTF lineages, which are older in age and characterized by low‐dispersal rates and long‐term isolation.

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Bayesian spatio‐temporal reconstruction reveals rapid diversification and Pleistocene range expansion in the widespread columnar cactus Pilosocereus

Lavor

Calvente

Versieux

et al. 2018

Journal of Biogeography

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“…The level of heterozygosity in samples of P. grounellei growing in areas of natural occurrence in three Brazilian states (PI, RN, and BA) is higher than those reported for the following other species of the Pilosocereus genus, distributed in South America, using isozyme markers: P. lanuginosus (H e ¼ 0.274), P. aureispinus (H e ¼ 0.284), P. viloboensis (H e ¼ 0.292), P. machrissii (H e ¼ 0.380), and Pilosocereus tillianus (H e ¼ 0.352) (Nassar et al, 2003;Moraes et al, 2005;Figueredo et al, 2010). The microsatellite transferability proved to be an interesting approach that was used to i) reveal both the highest genetic polymorphism in P. gounellei and how the plants are genetically related in three parts of the Caatinga biome; ii) select SSR loci candidates (mEgR98, Pichi44, and mEgR63) to investigate genetic diversity in xiqueexique plants from others regions of the Caatinga; iii) indicate the need of broader the genetic base of the species to obtain most genetically divergent plant groups with potential for use in breeding programs.…”

Section: Discussionmentioning

confidence: 61%

Genetic diversity and structure of populations in Pilosocereus gounellei (F.A.C.Weber ex K.Schum. ) (Cactaceae) in the Caatinga biome as revealed by heterologous microsatellite primers

Monteiro

Mangolin

Neves

et al. 2015

Biochemical Systematics and Ecology

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a b s t r a c tMicrosatellite transferability was used as a method to examine the genetic diversity and structure of populations in Pilosocereus gounellei seedling samples that have potential to implement effective restoration strategies for degraded and disturbed areas of the Caatinga biome. Genomic DNA was extracted from 85 seedlings obtained from fruit collected from plants growing in native areas in the Brazilian states of Piaui (PI), Rio Grande do Norte (RN), and Bahia (BA). Six microsatellite primers were polymorphic. AMOVA showed higher genetic variation within (72%) than among (28%) the samples from the three states. The high level of similarity between the seedlings from PI, BA, and RN indicated that samples collected at any of the three sites can be used to represent the genetic diversity of the species. Seeds of plants from the three States are recommended as samples for germplasm banks and/or the production of plantlets to i) plant in areas of strategic reserves for forage, ii) deploy new cultivation areas, iii) restore degraded areas in the semi-arid Northeast, and iv) maintain ecological reserve banks and fodder with genetically divergent plants.

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“…The high genetic variability shown in the present research allows an efficient selection, but further investigation should be performed by examining the levels of allozyme variation and the genetic structure (Figueredo et al 2010). …”

Section: Discussionmentioning

confidence: 89%

The plant size and the spine characteristics of the first generation progeny obtained through the cross-pollination of different genotypes of Cactaceae

Mihalte

Sestraş

2011

Euphytica

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The main characteristics (plant diameter, number of spine/areoles and length of spines) of 16 cactus hybrids were analysed and the genetic variability and broad-sense heritability was studied. The descendants were obtained through a cyclic crosspollination pattern, with the parental forms chosen based on aesthetic considerations. Cross-pollination among Rebutia senilis 9 Aylostera muscula, Rebutia tarvitaensis 9 Aylostera muscula, Aylostera flavistyla 9 Rebutia senilis, Rebutia senilis 9 Aylostera flavistyla, Aylostera muscula 9 Aylostera albiflora and Rebutia senilis 9 Aylostera albiflora did not succeed, whereas all of the other hand-pollinated crosses succeeded and produced viable seeds. The highest values of the analysed characters were observed in the progeny of A. fiebrigii var. densiseta 9 R. senilis and A. buiningiana 9 A. vallegardensis and the artificial selection to identify plants with special decorative traits was extremely efficient among them. In the F 1 population of the studied crosses, a large genetic diversity was found within hybrid combinations (families), between combinations and a different variation was recorded among the analysed traits. The broad-sense heritability ranged between 0.909 (plant diameter) and 0.948 (spines length). All of the characters analysed, in the present experience, have a strong genetic determinism, being greatly influenced by the genotype and to a lesser extent, by the cultivation conditions (greenhouse).

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Population genetic diversity and structure of Pilosocereus tillianus (Cactaceae, Cereeae), a columnar cactus endemic to the Venezuelan Andes

Cited by 21 publications

References 34 publications

Bayesian spatio‐temporal reconstruction reveals rapid diversification and Pleistocene range expansion in the widespread columnar cactus Pilosocereus

Bayesian spatio‐temporal reconstruction reveals rapid diversification and Pleistocene range expansion in the widespread columnar cactus Pilosocereus

Genetic diversity and structure of populations in Pilosocereus gounellei (F.A.C.Weber ex K.Schum. ) (Cactaceae) in the Caatinga biome as revealed by heterologous microsatellite primers

The plant size and the spine characteristics of the first generation progeny obtained through the cross-pollination of different genotypes of Cactaceae

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