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2 resultados encontrados para: AUTOR: Chaires Pacheco, Mariana
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1.
Artículo
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Successive grafting confers juvenility traits to adult Spanish red cedar (Cedrela odorata Linnaeus): a tool for the rescue of selected materials
Robert, Manuel L (autor) ; Juárez Gómez, Juan (autor) ; Chaires Pacheco, Mariana (autora) ; Peña Ramírez, Yuri Jorge Jesús (autor) ;
Contenido en: New Forests Vol. 51 (2020), p. 335-347 ISSN: 1573-5095
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Resumen en: Inglés |
Resumen en inglés

Spanish red cedar, Cedrela odorata L. (Meliaceae), is a valuable timber tree in tropical American forests. Existing demand for elite individuals endangers the conservation of interesting germplasm, prompting the development of efficient protocols for the establishment of orchards for tree breeding. Based on previous work regarding grafting adult individuals onto young rootstocks, superior trees from Calakmul Biosphere Reserve in Campeche, Mexico were employed as a source of explants for plant regeneration after successive rounds of grafting and micrografting onto juvenile rootstocks. The results showed that root length and appearance, internode distance, leaf length and number, and plant height values for trees derived from successive rounds of grafting and micrografting were similar to those obtained from juvenile trees derived from seeds, suggesting that developmental traits associated with reinvigoration were partially induced following the reported procedure. This protocol may be useful for the propagation of mature elite trees belonging to the Meliaceae family.


2.
- Artículo con arbitraje
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Development of an Ideotype-Based selection tool for native tropical tree breeding by smallholder planters in mexico’s maya forest
Solis Guillén, Isabel ; Chaires Pacheco, Mariana (coaut.) ; Juárez Gómez, Juan (coaut.) ; O’Connor Sánchez, Aileen (coaut.) ; Peña Ramírez, Yuri Jorge Jesús (coaut.) ;
Contenido en: Small-scale Forestry Vol. 16, no. 4 (December 2017), p. 521–534 ISSN: 1873-7854
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Resumen en: Inglés |
Resumen en inglés

Tree planters of the Yucatan peninsula in México are mostly first-generation small-scale forest owners. As a consequence of the lack of a management plan, trees employed for plantations are currently produced without any traceability or genetic improvement protocol, resulting in the reduced quality and heterogeneity of established materials. Recently, the Mexican government published a law to force planters to reverse this situation through the initiation and operation of germplasm management and traceability programs within each physiographic sub-province. Thus, planters located in the “Campeche Karts sub-provenance” now need to select superior trees for plant production, provenance assays, and orchard establishment. As a reference for the improvement goals in this work, we developed a model ideotype tree and qualification tool based on a weight-free selection index to compare trees in established plantations to enable the effective selection of superior trees to be used as seed sources and as a starting population for genetic improvement programs. The tool presented here is easy to use by planters, requiring a very basic computer or smartphone to run a spreadsheet where simple morphometric evaluation are captured, trees are qualified in comparison to the ideotypic values of each parameter with the aid of common field equipment. When this tool was applied to individuals from two different plantations, the qualification methodology ranked the individuals, allowing for the selection of superior trees in a more robust way, in contrast to the use of parameters mostly based on price and driven by wood volume.