VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • Population structure of causal agents of red band needle blight and brown spot needle blight of pines in selected areas of Central and Southeastern Europe : doctoral dissertation = Populacijska struktura gliv povzročiteljic rdeče in rjave pegavosti borovih iglic na izbranih območjih srednje in jugovzhodne Evrope : doktorska disertacija
    Sadiković, Dušan
    Dothistroma needle blight (DNB), caused by Dothistroma septosporum and D. pini, and Brown spot needle blight, (BSNB), caused by Lecanosticta acicola, belong to the most harmful and important pine ... diseases today. DNB has been present in Southeastern Europe since the 1950s and BSNB since the 1970s. Recent outbreaks of BSNB and the fact that DNB is widely spread, made it necessary to study the population structure of these disease agents by measuring their genetic variety in phylogenetic, mating type gene and microsatellite marker analyses. In addition, the diversity of certain morphological traits was determined and migration patterns evaluated through use of coalescent-based method. Populations from Slovenia, Serbia and Croatia, obtained from Pinus nigra, P. mugo and P. halepensis, were selected for the study and compared with populations from Europe (EU), North America (NA), Central America (CA), South America (SA), Africa (AF) and Australia (AU). Serbian and most of Slovenian D. septosporum isolates grouped in phylogenetic analyses based on elongation factor (EF1-alpha) and beta-tubulin-2 (betaT2) together with the isolates from EU and NA, while Celje (Slovenia) formed a so far unrecognized new EF1-alpha haplotype. Croatian D. septosporum isolates also formed a new EF1-alpha haplotype and a separate clade, while they grouped with isolates from NA, CA, SA, AU and AF in the betaT2 gene region analysis. ITS analysis was uninformative. In population structure analyses, most of Slovenian and Serbian populations composed a single genetic cluster, while populations from Trenta (Slovenia) and Kožino (Croatia) formed separate clusters. Migration analyses showed that gene flow occurs between populations from Slovenia and Serbia. Slovenian D. pini isolates and isolates from SA have identical ITS, EF1-alpha in betaT2 sequences. In population structure analyses, D. pini isolates displayed clonality and low genetic diversity, likely as a consequence of a single event introduction. L. acicola phylogenetic analysis revealed a novel EF1-alpha haplotype in Croatian population and showed that Slovenian and Croatian isolates share a common ancestry with individuals from Central and Northern Europe. Population structure analysis revealed four distinct genetic clusters, generally corresponding to their respective geographic location and hosts. Observed unequal ratio of mating types and low overall genetic diversity in the population indicates that L. acicola predominantly reproduces asexually. Low genetic variation within each of the four clusters and absence of or low gene flow suggests that the different L. acicola populations were independently introduced.
    Vrsta gradiva - disertacija ; neleposlovje za odrasle
    Založništvo in izdelava - Ljubljana : [D. Sadiković], 2020
    Jezik - angleški
    COBISS.SI-ID - 37302275

    Povezava(-e):

    Repozitorij Univerze v Ljubljani – RUL
    Digitalna knjižnica Slovenije - dLib.si

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