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  • Botany 2010 - Abstract Search
    digitized to be accessible to scientists A key challenge faced by all biodiversity collections is determining a transformation process that yields high quality results in a cost and time efficient manner The University of North Texas s Texas Center for Digital Knowledge TxCDK and the Botanical Research Institute of Texas BRIT are developing a web based application workflow for combining human and machine processes to facilitate the transformation of herbarium label data into machine processable parsed data The workflow and framework called the Apiary Project www apiaryproject org are made possible through integration of a variety of existing technologies and the application of standards developed by the Taxonomic Databases Working Group and the Dublin Core Metadata Initiative The workflow interfaces will allow the human participants to inspect and analyze the digital herbarium sheet images and extract textual components with the assistance of software technologies such as Optical Character Recognition OCR then parse this text into standardized metadata elements The workflow will provide a final quality control where specimen records are evaluated for accuracy and completeness Broader Impacts Log in to add this item to your schedule Related Links Apiary Project Site 1 Botanical Research Institute of Texas 500 E 4th

    Original URL path: http://2010.botanyconference.org/engine/search/index.php?func=detail&aid=644 (2016-02-01)
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  • Botany 2010 - Abstract Search
    these clades contains all species endemic to continental Africa and Madagascar nearly 50 species in total Previous studies have confirmed the monophyly of this clade and have also identified two subclades loosely corresponding to the genera Neocussonia and Astropanax Geographically both subclades have representatives in Madagascar and in continental Africa Molecular evidence from previous work has suggested origins for each of them in the continent but these findings were based on limited sampling In the present study we have doubled the number of species sampled from 19 to 40 and have expanded the set of molecular markers from two to five to include both nuclear ITS ETS and plastid ndhF rpl32 trnK rps16 rpl32 trnL sequence data Our results demonstrate strong support for the monophyly of African Malagasy Schefflera and its two subclades Neocussonia and Astropanax Evidence supporting continental origins is confirmed with more complex biogeographic relationships emerging including evidence of later radiations from Madagascar back to Africa Classically employed morphological characters have been evaluated for congruence certain widely used features such as inflorescence structure are poorly correlated with phylogenetic relationships Convergence can be seen in other characters particularly among Malagasy species from both clades which display a tendency toward unifoliate leaves a rare trait in Schefflera Further indications reveal some surprises at the species level among the more morphologically diverse members of the Astropanax clade Results demonstrate paraphyly with respect to the most widespread species Schefflera myriantha which is distributed throughout Africa the Comoros islands and Madagascar S myriantha from continental Africa appears sister to a clade containing both Malagasy representatives as well as S monophylla This finding suggests that Malagasy S myriantha while morphologically coherent may represent a distinct lineage from its African ancestors Broader Impacts Log in to add this item to your schedule 1 Virginia Commonwealth

    Original URL path: http://2010.botanyconference.org/engine/search/index.php?func=detail&aid=760 (2016-02-01)
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  • Botany 2010 - Abstract Search
    bean Phaseolus vulgaris We present an allele diversity study conducted on 104 wild common beans evaluating seven candidate genes for drought tolerance The objective of this research was to screen for alleles of relevant drought genes An analysis of linkage disequilibrium between these selected genes was compared with patterns of neutral markers With these data we assessed the genepool structure and selection history of the species We started this project by identifying orthologous genes based on phylogenetic and genealogical relationships between different crop species Our principal results suggest a strong relationship between DREB2A and population structure in common bean and significant associations of DREB2B and ERECTA genes with estimated habitat drought stress for the wild accessions The relevance of introgression genetic drift ancestral variation and low genetic polymorphism was analyzed in reference to the remaining genes Finally this investigation has shown that wild common bean is a reservoir of unusual and important genetic and adaptive variation Broader Impacts Log in to add this item to your schedule Related Links Laboratorio de Botánica y Sistemática CIAT Bean Program 1 Universidad de los Andes Departamento de Ciencias Biológicas Laboratorio de Botánica y Sistemática Apartado Aéreo 4976 Bogotá DC Colombia 2 Centro Internacional

    Original URL path: http://2010.botanyconference.org/engine/search/index.php?func=detail&aid=119 (2016-02-01)
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  • Botany 2010 - Abstract Search
    endemic flora but few complete reviews focusing on identification have been published Approximately 77 of the Hawaiian fern and lycophyte taxa are considered endemic In addition at least 33 species are naturalized aliens Over half of these naturalized species have become common and abundant and therefore have invasive potential To prevent the spread of invasive ferns and preserve native ecosystems it is critical that species be identified correctly and quickly Current identification is difficult due to old nomenclature few illustrations and esoteric terminology As the number of fern and lycophyte species increases and taxonomic changes occur a more efficient and easily accessible method of identification is needed to help slow the introduction of alien taxa and to preserve native ecosystems An interactive identification key IIK of the Hawaiian ferns and lycophytes can provide students ecologists and land managers with a better method of identification I am preparing an IIK for all 221 taxa of Hawaiian ferns and lycophytes using Lucid v 3 3 software The IIK includes all previously recorded native and naturalized taxa and incorporates newly described species and recently discovered naturalized species To assist in identification multiple images of diagnostic characters are being compiled and added to the

    Original URL path: http://2010.botanyconference.org/engine/search/index.php?func=detail&aid=59 (2016-02-01)
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  • Botany 2010 - Abstract Search
    1 A molecular phylogenetic evaluation of the polyphyletic genus Paradrymonia Gesneriaceae Paradrymonia Gesneriaceae is a genus of facultative epiphytic herbs with 38 currently recognized species It occurs throughout the neotropics except SE Brazil and the Caribbean with centers of diversity in Colombia and Ecuador Species relationships within this genus were assessed using molecular data generated from the nuclear ribosomal internal and external transcribed spacer regions ITS and ETS and the chloroplast trnH psbA intergenic spacer region Analyses utilizing parsimony maximum likelihood and Bayesian inference methods were used to assess phylogenetic relationships among 22 species of Paradrymonia and several other species from other genera within the tribe Episcieae A preliminary analysis strongly supports that Paradrymonia as currently circumscribed is polyphyletic and includes taxa in two different clades A strongly supported clade containing the type species of Paradrymonia includes Chrysothemis pulchella and C friedrieshthaliana and ten species of Nautilocalyx Another clade including Paradrymonia longifolia and P anisophylla nest within a paraphyletic Drymonia We suggest the necessity of studying underexplored morphological characters such as bearded anthers rosette habit and corolla tube angulation to recognize new generic boundaries in the Episciae Broader Impacts Log in to add this item to your schedule 1 The

    Original URL path: http://2010.botanyconference.org/engine/search/index.php?func=detail&aid=453 (2016-02-01)
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  • Botany 2010 - Abstract Search
    with Piper nigrum maximum parsimony and Bayesian analyses The species are parasites on two rosid plant lineages The ancestral host association seems to be on members of the Fabaceae followed by a single host shift to Euphorbia spp Euphorbiaceae in Hydnora Morphological evolution of Hydnora revealed that rhizome shape is a homoplastic character thus a poor character for defining intrageneric sections In contrast synapomorphies included osmophore position and tepal color Within Hydnora africana s l cryptic species were discovered including a new species from southern Namibia and the recognition of Hydnora longicollis Welw in Angola and northern Namibia We have shown that the cryptic species can be distinguished by floral odor and floral metrics Within the Euphorbia parasitizing clade of Hydnora in southern Africa an apparent radiation of species is based on allopatry extreme climatic variation and potentially host based co speciation Significant work may be needed to revise the taxonomy of the Fabaceae parasitizing clade of African Hydnora excluding Hydnora esculenta where only two species are currently recognized but where at least six formerly recognized species from east and northern Africa remain unevaluated In Prosopanche the earliest diverging lineage is Prosopanche bonacinae and additional data maybe required to resolve

    Original URL path: http://2010.botanyconference.org/engine/search/index.php?func=detail&aid=274 (2016-02-01)
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  • Botany 2010 - Abstract Search
    environmental extremes Species are found in maritime montane and desert habitats The genus is thought to have only recently radiated into the North American deserts and many taxa are thought to be actively speciating Modern treatments rely on highly variable morphological characters resulting in an unstable taxonomy Compounding the problem many Abronia hybridize in sympatry producing a number of species complexes a few of these hybrids may be common enough to have achieved species or subspecies status We undertook a phylogenetic analysis of the genus to see if the addition of molecular characters could resolve some of the more vexing species complexes and offer a more stable taxonomy We sampled 90 populations representing 17 recognized Abronia and four outgroup species from within the Nyctaginaceae Our preliminary analysis indicates that there are two well supported maritime clades with Abronia latifolia distinct from the other maritime species with which it grows in sympatry The third clade includes both desert and montane species in which our data weakly supports a cold desert and a hot desert grouping There appears to be no morphological or molecular support for the separation of Abronia villosa and Abronia umbellata which have been considered a species complex in

    Original URL path: http://2010.botanyconference.org/engine/search/index.php?func=detail&aid=596 (2016-02-01)
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  • Botany 2010 - Abstract Search
    of the Trifolium amabile Kunth Species Complex Trifolium amabile Kunth Fabaceae is a New World complex of clover populations ranging from the mountains of southern Arizona of the United Sates throughout the mountainous regions of Central America and continuing southward to the province of Córdoba in northern central Argentina In addition to its extensive geographical distribution the members of this species complex vary greatly in their size habit and morphological features The most recent treatment of this group in the Zohary and Heller monograph recognizes five varieties of T amabile T amabile var amabile T amabile var hemsleyi T amabile var pentlandii T amabile var mexicanum and T amabile var longifolium However this treatment is outdated and inadequate and other studies have noted that the distinctions among the varieties are not clear Specimens from herbaria worldwide have been utilized for a morphometric examination of a suite of vegetative and reproductive characters to determine specific and or subspecific boundaries Preliminary analyses have shown the potential for multiple distinct taxa within this complex Data was analyzed using standard taxonomic statistical packages The results of this study along with a distribution map will be presented Broader Impacts Log in to add this item

    Original URL path: http://2010.botanyconference.org/engine/search/index.php?func=detail&aid=132 (2016-02-01)
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