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New York City, CO, United States

Krishnan S.,Denver Botanic Gardens
CAB Reviews: Perspectives in Agriculture, Veterinary Science, Nutrition and Natural Resources | Year: 2013

Coffee genetic resources are being lost at a rapid pace, leading to loss of genetic diversity. Some of the threats contributing to the erosion of coffee genetic diversity include human population pressures, which lead to conversion of land to agriculture, deforestation and land degradation; low coffee prices leading to abandoning of coffee trees in forests and gardens and shifting cultivation to other more remunerative crops; and global climate change. Conservation of coffee germplasm as seeds is not a viable option because of the recalcitrant/intermediate storage behaviour of seeds. Hence, development of a comprehensive conservation strategy for coffee should take into account complementary methods of in situ and ex situ conservations. The development of molecular techniques has expanded the possibilities and tools for genetic analysis for efficient conservation and use of coffee genetic resources. Before it is too late, a thorough evaluation of existing germplasm should be performed based on which a comprehensive conservation strategy can be developed. © CAB International 2013.

Hazlett D.L.,Denver Botanic Gardens | Torres-Herrera J.C.,Instituto Nacional Of Conservacion Y Desarollo Forestal
Economic Botany | Year: 2012

Socioeconomic Value and Growth of Naturalized Musa balbisiana L. A. Colla Leaves in Honduras. Musa balbisiana (Musaceae) is a seed-producing diploid banana indigenous to Southeast Asia. After it was introduced to Honduras it became naturalized in nearby second-growth areas of the north coast. Local residents were quick to recognize the socioeconomic value of these wild banana leaves as a wrap for traditional nacatamales. To estimate the monetary value and to provide preliminary data on sustainable harvest of these leaves, interviews and field research were undertaken in 2009. From July to September of that year, each of 38 harvesters averaged a weekly sale of 4,400 cut, de-veined, and blanched M. balbisiana leaves. This weekly harvest sold for Lempiras (Lps.) 550.00 or ca. U. S. $30.00 to truckers, who transported them to major markets. The number of leaves produced in three months was estimated by two techniques: 1) The traditional cut of the entire pseudostem and 2) a careful cut to only remove useful leaves. The number of useful leaves cut at the onset of the study and three months later was 11 and 13 for techniques 1 and 2, respectively. This difference was not significant, but the more careful method did yield significantly wider, longer, and a greater number of total leaves (useful plus immature). This is the first field study to estimate leaf production by naturalized M. balbisiana plants in Honduras. All leaves are currently harvested from wild populations and no sustainable management plans exist. The socioeconomic value and cultural use of M. balbisiana leaves in Honduras is an example of an exotic species that has important socioeconomic benefits. This naturalized Musa appears to have few of the negative impacts typically attributed to exotic plants. © 2012 The New York Botanical Garden.

Schwabe A.L.,University of Northern Colorado | Hubbard A.R.,University of Northern Colorado | Neale J.R.,Denver Botanic Gardens | McGlaughlin M.E.,University of Northern Colorado
Conservation Genetics Resources | Year: 2013

The genus Sclerocactus (Cactaceae) consists of 15 species, which have a confused taxonomic history due to morphological similarities and distribution overlap. Habitat loss and hybridization are of concern and have established cause for genetic investigations to further understand the genus and develop conservation strategies. Thirteen variable microsatellite loci were identified using S. glaucus and S. parviflorus and were tested in three additional species: S. wetlandicus, S. brevispinus and S. cloverii. The mean number of alleles per locus ranged from 2 to 11, with an average of 6. 6. The observed and expected mean heterozygosity ranged from 0. 00 to 0. 90 and 0. 26 to 0. 90, respectively. These loci will aid in determining levels of hybridization, diversity and taxonomy of Sclerocactus. © 2012 Springer Science+Business Media B.V.

Plant Select, Denver Botanic Gardens and Colorado State University | Date: 2006-09-26

Living plants in the nature of a unique and specific cultivar of gazania krebsiana.

Plant Select and Denver Botanic Gardens | Date: 2006-04-18

Living plants in the nature of a unique and specific cultivar of veronica reavis.

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