Taxonomic implications of the morphological and genetic variation of cultivated and domesticated populations of the Agave angustifolia complex (Agavoideae, Asparagaceae) in Oaxaca, Mexico

Rivera-Lugo, Miguel; García-Mendoza, Abisaí; Simpson, June; Solano, Eloy; Gil-Vega, Katia del Carmen

doi:10.1007/s00606-018-1525-0

Cited by 26 publications

(37 citation statements)

References 27 publications

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“…obs.). Low levels of genetic diversity are generally associated with inbreeding and this, in turn, can trigger a reduction in the average adaptation of the population, in a process known as inbreeding depression (Charlesworth and Charlesworth, 1987;Reed and Frankham, 2003;Hedrick, 2005). This association between genetic diversity and low seed production has been reported in congeners such as Agave murphyi Gibson (Gentry, 1982;Parker et al, 2007) and Agave schottii Engelm (Trame et al, 1995).…”

Section: Morphological and Genetic Diversitymentioning

confidence: 99%

“…On one hand, agave species with a dominance of vegetative reproduction, form the primary gene pools from which a high diversity of traditional landraces have been artificially selected (A. angustifolia Haw. and A. rhodacantha Trel., Vargas-Ponce et al, 2007Rivera-Lugo et al, 2018;Trejo et al, 2018). Vegetative reproduction can also become dominant in managed populations, although it is not a common reproductive system in wild populations (A. parryi Engelm., Parker et al, 2010) or in their wild relatives (A. hookeri Jacobi, Figueredo-Urbina et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Morphological and Genetic Variation in Monocultures, Forestry Systems and Wild Populations of Agave maximiliana of Western Mexico: Implications for Its Conservation

et al. 2020

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Cabrera-Toledo et al. Morphological and Genetic Variation in Agave maximiliana Non-significant morphological differentiation was found among categories. Only IBE was significant in the genetic structure (β = 0.32, p = 0.007), while neither IBE nor IBD was detected in the morphological differentiation. We discuss the implications of these results in the context of the weaknesses and strengths of A. maximiliana in the face of the socio-ecological changes predicted for the study area in the short term.

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Section: Morphological and Genetic Diversitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Morphological and Genetic Variation in Monocultures, Forestry Systems and Wild Populations of Agave maximiliana of Western Mexico: Implications for Its Conservation

et al. 2020

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“…However, these markers offer very poor intrageneric resolution. In contrast, AFLP, SSR, and SSAP markers offer very high genetic resolutions, allowing population genetic analyses in different Agave species (Gil-Vega et al, 2006;Bousios et al, 2007;Trejo et al, 2018;Rivera-Lugo et al, 2018). Because false positive and false negative data can be obtained using fragment length as an estimate for genetic identity between individuals, especially when dealing with genetically distant species, methods alternative to AFLP, SSR, and SSAP have been proposed to derive molecular phylogenies based on nucleotide sequence, such as transcriptomics, RNA/DNA hybrid enrichment, and phylogenomics, all of which are based on next-generation sequencing (Lemmon and Lemmon, 2013;Huang et al, 2018;Zhang et al, 2018;Fernández et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Mayahuelin, a Type I Ribosome Inactivating Protein: Characterization, Evolution, and Utilization in Phylogenetic Analyses of Agave

et al. 2020

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Agaves resist extreme heat and drought. In A. tequilana var. azul, the central spike of the rosette-containing the shoot apical meristem and folded leaves in early stages of development-is remarkably heat tolerant. We found that the most abundant protein in this organ is a 27 kDa protein. This protein was named mayahuelin to honor Mayáhuel, the agave goddess in the Aztec pantheon. LC-MS/MS analyses identified mayahuelin as a type I RIP (Ribosome Inactivating Protein). In addition to the spike, mayahuelin was expressed in the peduncle and in seeds, whereas in mature leaves, anthers, filaments, pistils, and tepals was absent. Anti-mayahuelin antibody raised against the A. tequilana var. azul protein revealed strong signals in spike leaves of A. angustifolia, A. bracteosa, A. rhodacantha, and A. vilmoriniana, and moderate signals in A. isthmensis, A. kerchovei, A. striata ssp. falcata, and A. titanota, indicating conservation at the protein level throughout the Agave genus. As in charybdin, a type I RIP characterized in Drimia maritima, mayahuelin from A. tequilana var. azul contains a natural aa substitution (Y76D) in one out of four aa comprising the active site. The RIP gene family in A. tequilana var. azul consists of at least 12 genes and Mayahuelin is the only member encoding active site substitutions. Unlike canonical plant RIPs, expression of Mayahuelin gene in S. cerevisiae did not compromise growth. The inhibitory activity of the purified protein on a wheat germ in vitro translation system was moderate. Mayahuelin orthologs from other Agave species displayed one of six alleles at Y76: (Y/Y, D/D, S/S, Y/D, Y/S, D/S) and proved to be useful markers for phylogenetic analysis. Homozygous alleles were more frequent in wild accessions whereas heterozygous alleles were more frequent in cultivars. Mayahuelin sequences from different wild populations of A. angustifolia and A. rhodacantha allowed the

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“…Por su parte, la disminución de la diversidad genética se origina al evitar la reproducción sexual en los agaves. Un ejemplo es la propagación de A. tequilana, maguey utilizado para elaborar tequila que, soportada por una intensiva reproducción clonal a través de monocultivos (Rivera-Lugo et al, 2018), ha conducido a reducir drásticamente su variabilidad genética. De esta manera, se favorece una mayor susceptibilidad a plagas y enfermedades (Gil et al, 2001).…”

Section: Plagas Y Enfermedades Del Agaveunclassified

Conocimiento tradicional y academia: productores de maguey y mezcal de pequeña escala en las regiones Norte y Centro de Guerrero, México

Barrientos-Rivera¹,

Hernández-Castro²,

Sampedro-Rosas³

et al. 2020

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El objetivo de la investigación de la que se deriva este artículo fue documentar el conocimiento tradicional de los productores de maguey y mezcal del estado de Guerrero en México: sus prácticas agronómicas, los aspectos ecológicos imbricados en éstas, así como sus usos, costumbres, tradiciones y las alternativas que han instrumentado para rescatar y preservar el conocimiento tradicional; ello con el fin de explorar posibilidades de articulación con los aportes de la investigación científica. El estudio se realizó en la región Centro (cinco localidades de dos municipios) y Norte (tres localidades de dos municipios) del estado de Guerrero entre enero de 2017 y marzo de 2018. Se hicieron entrevistas semiestructuradas a informantes clave (productores de maguey-mezcal), así como recorridos de campo y observación participante. Si bien el maguey es esencial en la economía de muchas familias rurales de estas regiones para la elaboración de mezcal, la actividad agaveramezcalera se encuentra amenazada debido a las condiciones ambientales desfavorables y la sobreexplotación de las otrora abundantes plantas silvestres, por lo que los productores participantes en el estudio consideraron fundamental el desarrollo de actividades conservacionistas del agave entre sus familias para así integrarlas a la dinámica de producción y conservación, no sólo de las plantas, sino de los conocimientos y valores comunitarios que permiten mantener viva la tradición milenaria de producir maguey y mezcal; ámbito donde la comunidad científica puede desempeñar un papel notable en apoyo de este esfuerzo.

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Taxonomic implications of the morphological and genetic variation of cultivated and domesticated populations of the Agave angustifolia complex (Agavoideae, Asparagaceae) in Oaxaca, Mexico

Cited by 26 publications

References 27 publications

Morphological and Genetic Variation in Monocultures, Forestry Systems and Wild Populations of Agave maximiliana of Western Mexico: Implications for Its Conservation

Morphological and Genetic Variation in Monocultures, Forestry Systems and Wild Populations of Agave maximiliana of Western Mexico: Implications for Its Conservation

Mayahuelin, a Type I Ribosome Inactivating Protein: Characterization, Evolution, and Utilization in Phylogenetic Analyses of Agave

Conocimiento tradicional y academia: productores de maguey y mezcal de pequeña escala en las regiones Norte y Centro de Guerrero, México

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