19 research outputs found

    Key and checklist of Xanthophyllum (Polygalaceae) of Borneo

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    A key to and a check list of the 56 Xanthophyllum (Polygalaceae) species of Borneo is presented. One species is newly described, X. albicaulis. Xanthophyllum hildebrandii is sunk in X. ellipticum

    KEDROSTIS MEDIK. (CUCURBITACEAE) IN ASIA

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    DE WILDE, W.J.J.O. & DUYFJES, BRIGITTA E.E. 2004. Kedrostis Medik. in Asia. Reinwardtia 12(2):129 – 133. — Kedrostis (Cucurbitaceae) occurs in Africa and Madagascar and comprises 4 (5) species in Asia. Of these 2 species are found in India and Sri Lanka and 2 (3) species in western Malesia. One Malesian species is for the first time included in Kedrostis here, Kedrostis bennettii (Miq.) W.J. de Wilde & Duyfjes, and one species is described as new here, Kedrostis hirta W.J. de Wilde & Duyfjes.One more Malesian species is insufficiently known to be formally described

    MISCELLANEOUS SOUTH EAST ASIAN CUCURBIT NEWS

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    DE WILDE, W.J.J.O. & DUYFES, B.E.E. 2008. Miscellaneous South East Asian cucurbit news. Reinwardtia 12(4):267 – 274. –– This paper contains corrections, additions, and name changes in several genera, which became apparent since previous publications by the authors in these genera.(1) Baijiania A.M. Lu & J.Q. Li: a range-extension(2) Benincasa Savi: a name change(3) Diplocyclos (Endl.) T. Post & Kuntze: lectotypification of the synonym Ilocania pedata Merr.(4) Gymnopetalum Arn.: a name change, designation of two neotypes, a new record(5) Hodgsonia Hook. f. & Thomson: a new subspecies(6) Indomelothria W.J. de Wilde & Duyfjes: the largest fruits(7) Trichosanthes L.: three new varieties, a name change, amendments of fruit descriptionss, and a range-extension(8) Zehneria Endl.: a new species from Mindanao

    ANANGIA, A NEW MONOTYPIC GENUS OF CUCURBITACEAE FROM EAST MOLUCCAS

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     DE WILDE, W.J.J.O; DUYFEES, B.E.E. & VAN DER HAM, R.W.J.M. 2006. Anangia, a new monotypic genus of Cucurbitaceae from East Moluccas. Reinwardtia 12(3): 219 – 222.– A new monotypic genus of Cucurbitaceae from Morotai (Indonesia) is described. The genus is defined by unique characters, including large sepals, much longer than the petals, and it has distinctly cucurbitoid pollen features. The only species is Anangia macrosepala W.J. de Wilde & Duyfjes

    Analyse der Virulenzsituation des Roggenschwarzrostes (Puccinia graminis f. sp. secalis) im ökologischen Landbau zur Züchtung resistenten Roggens

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    Organic Agriculture is especially affected by the increasing spread of stem rust in rye (Puccinia graminis f. sp. secalis) because there is a lack of resistant cultivars in Germany. To analyze the virulence situation of rye stem rust, 71 single-pustule-isolates were established and 30 of those were tested with a differential set consisting of 19 lines. The isolates could be classified into 22 different pathotypes. Only seven pathotypes could be found more than once. Most of the isolates showed a complexity of five virulences. In a preliminary analysis a Simpson index of 0,98 was found indicating a high level of diversity of German stem rust populations. Nine of 19 tested lines reacted fully resistant in seedling stage. In 2011, 70 and 30 rye populations, were cultivated under organic conditions at three and five field sites, respectively, to determine the level of adult-plant resistance. The most common cultivars Recrut, Conduct, Amilo, Firmament®, Lichtkornroggen®, Rolipa, and Lautenbacher were highly susceptible to stem rust under artificial infection with disease severities of about 50%. Twelve rye populations contained resistant plants in varying frequencies resulting in disease severities ranging from 6-34%

    Kontrolle des Roggenschwarzrostes, Puccinia graminis f. sp. secalis, im Ă–kologischen Landbau durch ZĂĽchtung resistenten Roggens

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    Der Ökologische Landbau (ÖLB) ist von der zunehmenden Ausbreitung des Roggenschwarz-rostes, Puccinia graminis f. sp. secalis, besonders betroffen, da resistente Roggensorten bisher nicht zur Verfügung stehen. Zur Analyse der Virulenzsituation des Roggenschwarzrostes wurden 389 Einpustelisolate (EPI) hergestellt, von denen 323 mit einem Differentialsortiment aus 15 Inzuchtlinien getestet wurden. Die EPI konnten 226 Pathotypen zugeordnet werden, von denen nur 56 Pathotypen häufiger als einmal vorkamen. Die Mehrzahl der Isolate wies in den Jahren 2011, 2012 und 2013 eine Komplexität von sieben, sechs bzw. fünf auf. Keine der 15 Differentiallinien reagierte vollständig resistent. Mit einem Simpson-Wert von 0,99 zeigt sich eine maximale Diversität der deutschen Schwarzrostpopulation. Das im Rahmen des Projektes entwickelt Isolatesortiment deckt das aktuelle Virulenzspektrum der Schwarzrostpopulationen ab und kann auch zukünftig genutzt werden, um die Wirksamkeit von Schwarzrostresistenzen zu prüfen. Außerdem kann das Auftreten neuer Virulenzen in der Schwarzrostpopulation jetzt rechtzeitig erkannt und wirtschaftlicher Schaden abgewendet werden. Zur Ermittlung der Adultpflanzen-Resistenz wurden bis zu 70 Genetische Ressourcen sowie adaptiertes, selbstfertiles Roggenmaterial unter ökologischen Bedingungen an fünf Feldstandorten je Jahr angebaut. Das Inokulum für die künstlichen Inokulationen wurde am JKI produziert und die Inokulation fand im Entwicklungsstadium BBCH37 (Mai 2013 und Mai 2014) statt. Die im Ökologischen Landbau verwendeten Sorten Recrut, Conduct, Amilo, Firmament®, Lichtkornroggen®, Rolipa und Lautenbacher waren nach künstlicher Infektion hoch anfällig gegenüber Schwarzrost mit Befallsstärken von über 50%. Nach drei Versuchs-jahren konnten insgesamt 17 Populationssorten aus Österreich (Tiroler, Kärntner, Oberkärnt-ner), Russland (Hy75/81, Hy2407/87, Talwoskaja 29, Hy9a/86, Talowskija, Zidlochowicke rane, Instituckie Wcz), den USA (Wheeler, Elbon, Wrens Abruzzi, Gator, Alfa), und Argentinien (Manfredi), mit mittleren Befallswerten von ≤30 % für die Züchtung bereitgestellt werden. Das Projekt leistete damit einen erheblichen Beitrag zur Nutzung der Biodiversität des Roggens und zur Optimierung der Resistenzzüchtung im ÖLB. Resistente Roggensorten werden in Zukunft eine effiziente Kontrolle des Roggenschwarzrostes ermöglichen, die den Grundsätzen des ÖLB entspricht. Das Projekt kann den Hauptaufgaben 2.1, 2.3, 2.4 und 2.14 des Forschungsplanes des BMELV zugeordnet werden und ist Grundlage für die Weiterentwicklung von Strategien zur Nutzung von Schwarzrostresistenzen sowie die Bewertung der Widerstandfähigkeit von Roggen gegenüber Schwarzrost

    Conserved Expression Signatures between Medaka and Human Pigment Cell Tumors

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    Aberrations in gene expression are a hallmark of cancer cells. Differential tumor-specific transcript levels of single genes or whole sets of genes may be critical for the neoplastic phenotype and important for therapeutic considerations or useful as biomarkers. As an approach to filter out such relevant expression differences from the plethora of changes noted in global expression profiling studies, we searched for changes of gene expression levels that are conserved. Transcriptomes from massive parallel sequencing of different types of melanoma from medaka were generated and compared to microarray datasets from zebrafish and human melanoma. This revealed molecular conservation at various levels between fish models and human tumors providing a useful strategy for identifying expression signatures strongly associated with disease phenotypes and uncovering new melanoma molecules

    Key and checklist of Xanthophyllum (Polygalaceae) of Borneo

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    A key to and a check list of the 56 Xanthophyllum (Polygalaceae) species of Borneo is pre- sented. One species is newly described, X. albicaulis. Xanthophyllum hildebrandii is sunk in X. ellipticum.</p

    Miscellaneous South East Asian cucurbit news

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    DE WILDE, W.J.J.O. &amp; DUYFES, B.E.E. 2008. Miscellaneous South East Asian cucurbit news. Reinwardtia 12(4):267 – 274. –– This paper contains corrections, additions, and name changes in several genera, which became apparentsince previous publications by the authors in these genera.(1) Baijiania A.M. Lu &amp; J.Q. Li: a range-extension(2) Benincasa Savi: a name change(3) Diplocyclos (Endl.) T. Post &amp; Kuntze: lectotypification of the synonym Ilocania pedata Merr.(4) Gymnopetalum Arn.: a name change, designation of two neotypes, a new record(5) Hodgsonia Hook. f. &amp; Thomson: a new subspecies(6) Indomelothria W.J. de Wilde &amp; Duyfjes: the largest fruits(7) Trichosanthes L.: three new varieties, a name change, amendments of fruit descriptionss, and a range-extension(8) Zehneria Endl.: a new species from Mindanao

    Kedrostis Medik. in Asia

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    DE WILDE, W.J.J.O.  &amp; DUYFJES, BRIGITTA E.E. 2004. Kedrostis Medik. in Asia. Reinwardtia 12(2):129 – 133. — Kedrostis (Cucurbitaceae) occurs in Africa and Madagascar and comprises 4 (5) species in Asia. Of these 2 species are found in India and Sri Lanka and 2 (3) species in western Malesia. One Malesian species is for the first time included in Kedrostis here, Kedrostis bennettii (Miq.) W.J. de Wilde &amp; Duyfjes, and one species is described as new here, Kedrostis hirta W.J. de Wilde &amp; Duyfjes. One more Malesian species is insufficiently known to be formally described.  Keywords: Kedrostis, Cucurbitaceae, SE Asia, taxonomy</p
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