Range and Variation in the Genus Ceratozamia (Zamiaceae)

Whitelock, Loran M.

doi:10.1663/0006-8101(2004)070[0235:ravitg]2.0.co;2

Cited by 4 publications

(3 citation statements)

References 7 publications

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“…This is in agreement with the findings of Marshall and Liebherr (2000) whom identified 2 biogeographic assemblages for endemic species, one to the north, and another to the south of the Neovolcanic range. However, the grouping found within Ceratozamia does not quite reflect the taxonomic relationships proposed by Stevenson et al (1986) or Whitelock (2004aWhitelock ( , 2004b) based on observations on plant size; leaflet width; emergent leaf color or megastrobilus morphology, since both wide and narrow leaflet species are represented within the major supported ( Fig. 1).…”

Section: Discussionmentioning

confidence: 60%

“…Clade D comprised 12 exemplars of Ceratozamia with high values of jackknife, bootstrap and BP (87/81/0.95). Clade A corresponds to the C. norstogii complex (Stevenson, 1982;Pérez-Farrera et al, 2004) and clade B to the C. miqueliana complex (Whitelock, 2004a(Whitelock, , 2004b. In clade D, C. decumbens is sister to a large clade grouping 11 exemplars (Fig.…”

Section: Discussionmentioning

confidence: 99%

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A modification to the SCAR (Sequence Characterized Amplified Region) method provides phylogenetic insights within Ceratozamia (Zamiaceae)

González¹

2015

Rev.Mex.Biodiv.

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Phylogenetic relationships among closely related plant species are still problematic. DNA intergenic regions often are insufficiently variable to provide desired resolution or support. In this study, a modification to the Sequence Characterized Amplified Region (SCAR) method was used to find polymorphic loci for phylogenetic analyses within Ceratozamia. RAPD markers were first used to detect variation in 5 species. Then, equal length fragments found in 2 or more species were excised from the gel, purified and digested with frequent cutter restriction enzymes for isolating both ends, which have the same primer site. Digested fragments were sequenced with the RAPD primer. Variable sequences were used to design specific primers for amplifying and sequencing in all species for phylogenetic analyses. Our results confirmed the previously known high genome sequence resemblance within this genus that contrasts with its high morphological variation. Only 7 parsimony informative characters were found with this approach. Nonetheless, the Digested-SCAR (D-SCAR) method provided some phylogenetic insights. Four main clades consistent with distribution ranges of the species were detected. The approach presented here was effective to solve some relationships within the genus and can potentially be implemented in other organisms to find polymorphic loci for phylogenetic studies at any taxonomic level.Resumen. Las relaciones filogenéticas entre especies de plantas cercanamente relacionadas es aún problemático. Las regiones intergénicas del ADN son a menudo insuficientemente variables para proveer los niveles de resolución y soporte deseados. En este estudio, se usó una modificación al método Sequence Characterized Amplified Region (SCAR) para encontrar loci polimórficos para análisis filogenéticos en Ceratozamia. Primero se usaron marcadores RAPD para detectar variación en 5 especies; luego, se cortaron del gel los fragmentos de la misma longitud en 2 o más especies, se purificaron y se digirieron con enzimas de restricción de corte frecuente para aislar las 2 terminaciones que tienen el mismo sitio del oligo. Los fragmentos digeridos se secuenciaron con el oligo usado para los RAPD. Las secuencias variables se usaron para diseñar oligos específicos para amplificar y secuenciar todas las especies para los análisis filogenéticos. Nuestros resultados confirmaron la elevada semejanza del genoma, previamente detectada dentro de este género, que contrasta con su elevada variación morfológica. Sólo 7 caracteres parsimoniosamente informativos se encontraron con esta estrategia. No obstante, el método SCAR-digerido (D-SCAR) aportó entendimiento filogenético adicional. Se detectaron 4 clados principales que son consistentes con el intervalo de distribución de las especies. La estrategia presentada en este trabajo fue efectiva para resolver algunas relaciones dentro del género y potencialmente puede implementarse en otros organismos para encontrar loci polimórficos para estudios filogenéticos a cualquier nivel taxonómico.Palabras clave: fil...

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Section: Discussionmentioning

confidence: 60%

Section: Discussionmentioning

confidence: 99%

A modification to the SCAR (Sequence Characterized Amplified Region) method provides phylogenetic insights within Ceratozamia (Zamiaceae)

González¹

2015

Rev.Mex.Biodiv.

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“…Pigment variation in emerging leaves has been well documented in Ceratozamia. Whitelock [17] mentioned that emerging leaves in the species belonging to the Ceratozamia miqueliana species complex (e.g., C. miqueliana H.Wendl., C. euryphyllidia Vázq.Torres, Sabato & D.W.Stev., C. becerrae Pérez-Farr., Vovides & Schutzman) always produce lime-green emergent leaves, a trait that can be considered as diagnostic in this group. Other Ceratozamia species may also produce a brownish pigmentation that may vary from yellowish-brown (as in C. subroseophylla) to a more common reddish-brown color, as in C. sanchezae or C. robusta.…”

Section: Discussionmentioning

confidence: 99%

Ceratozamia aurantiaca (Zamiaceae): A New Cycad Species from the Northern Rainforests of Oaxaca, Mexico

et al. 2021

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Ceratozamia aurantiaca, a new cycad species from Oaxaca, Mexico, is described. The new species is endemic to lowland karst tropical rainforests of the northern mountains (Sierra Norte region). This species is related to C. subroseophylla and C. robusta, together considered part of the C. robusta species complex due to their shared characteristics: robust, upright trunk; large and long leaves with densely armed petioles and linear to subfalcate leaflets; and large megastrobili. Ceratozamia aurantiaca, as the epithet suggests, is easily distinguished from other species by the orange color of its emerging leaves, a trait unique in the genus. Additionally, C. aurantiaca is distinguished from C. subroseophylla and C. robusta by having significantly shorter petioles, wider spacing between leaflets, and wider median leaflets. The taxonomic recognition of this species represents a step toward clarifying species delimitation in the C. robusta complex.

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A reassessment of theCeratozamia miquelianaspecies complex (Zamiaceae) of southeastern Mexico, with comments on species relationships

Pérez‐Farrera¹,

Vovides

Martínez‐Camilo

et al. 2009

Systematics and Biodiversity

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Range and Variation in the Genus Ceratozamia (Zamiaceae)

Cited by 4 publications

References 7 publications

A modification to the SCAR (Sequence Characterized Amplified Region) method provides phylogenetic insights within Ceratozamia (Zamiaceae)

A modification to the SCAR (Sequence Characterized Amplified Region) method provides phylogenetic insights within Ceratozamia (Zamiaceae)

Ceratozamia aurantiaca (Zamiaceae): A New Cycad Species from the Northern Rainforests of Oaxaca, Mexico

A reassessment of theCeratozamia miquelianaspecies complex (Zamiaceae) of southeastern Mexico, with comments on species relationships

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