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Insights into genetic variation patterns in the genus Sorbus in Thuringia
No full textThe main objective of the survey was the characterization of Hybrid-Species of the Sorbus latifolia aggr with universal (ccmp) cpDNA markers In total 141 samples of 12 Sorbus species including the two ancestral species Sorbus aria and Sorbus form:nabs were investigated Beside eight botanically characterized Hybrid Species (Sorbus acutisecta Sorbus decipiens Sorbus heilingensis Sorbus isenacensis Sorbus latifolia Sorbus multicrenata Sorbus parumlobata Sorbus subcordata) the species Sorbus pinnatifida and Sorbus intermedia were analysed (see Table 1 and Figure 1) Isozyme gene markers were applied to investigate apomictic regeneration in one species (Sorbus heilingensis) with overall 68 progenies of ten seed parents The cpDNA analyses displayed 10 haplotypes (sec Table 2) In Table 3 the haplotype frequencies within the single species are shown Two out of a total of 10 haplotypes (S 9 and S 14) were characteristic for the ancestral species Sorbus aria and Sorbus torminals respectively with frequencies of about 70% each Other haplotypes are rare in these two species With the exception of one Sorbus latifolia tree all hybrids showed solely haplotypes of the two potential ancestral species One of the rare haplotypes (S 22) of the ancestral species displayed frequencies higher than 50% in some of the hybrid species Thus a third unidentified ancestral species is possibly involved in the formation of this hybrid aggregate The distribution of haplotypes within and between the single hybrid species indicates that hybridisation between Sorbus aria and Sorbus torminalis is possible in both directions Each of the taxonomically distant species Sorbus pinnatifida and Sorbus intermedia showed unique haplotypes The investigations concerning apomictic regeneration in Sorbus heilingensis revealed unexpectedly high estimates of sexual regeneration of 96% since only 4% of the progenies showed identical patterns to their particular seed parent
Insights into genetic variation patterns in the genus Sorbus in Thuringia
No full textThe main objective of the survey was the characterization of Hybrid-Species of the Sorbus latifolia aggr with universal (ccmp) cpDNA markers In total 141 samples of 12 Sorbus species including the two ancestral species Sorbus aria and Sorbus form:nabs were investigated Beside eight botanically characterized Hybrid Species (Sorbus acutisecta Sorbus decipiens Sorbus heilingensis Sorbus isenacensis Sorbus latifolia Sorbus multicrenata Sorbus parumlobata Sorbus subcordata) the species Sorbus pinnatifida and Sorbus intermedia were analysed (see Table 1 and Figure 1) Isozyme gene markers were applied to investigate apomictic regeneration in one species (Sorbus heilingensis) with overall 68 progenies of ten seed parents The cpDNA analyses displayed 10 haplotypes (sec Table 2) In Table 3 the haplotype frequencies within the single species are shown Two out of a total of 10 haplotypes (S 9 and S 14) were characteristic for the ancestral species Sorbus aria and Sorbus torminals respectively with frequencies of about 70% each Other haplotypes are rare in these two species With the exception of one Sorbus latifolia tree all hybrids showed solely haplotypes of the two potential ancestral species One of the rare haplotypes (S 22) of the ancestral species displayed frequencies higher than 50% in some of the hybrid species Thus a third unidentified ancestral species is possibly involved in the formation of this hybrid aggregate The distribution of haplotypes within and between the single hybrid species indicates that hybridisation between Sorbus aria and Sorbus torminalis is possible in both directions Each of the taxonomically distant species Sorbus pinnatifida and Sorbus intermedia showed unique haplotypes The investigations concerning apomictic regeneration in Sorbus heilingensis revealed unexpectedly high estimates of sexual regeneration of 96% since only 4% of the progenies showed identical patterns to their particular seed parent
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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