01460naa a2200157 a 450000100080000000500110000800800410001910000210006024501280008126000090020952009310021865300260114970000160117570000290119177300820122019167312025-03-26       2011    bl uuuu     u00u1 u    #d1 aBARCELLOS, F. G.  aLimited vegetative compatibility as a cause of somatic recombination inbTrichoderma pseudokoningii.h[electronic resource]  c2011  aWith the aim of a better characterization of the somatic recombination process in Trichoderma pseudokoningii, a progeny from crossings between T. pseudokoningii strains contrasting for auxotroph markers was characterized by RAPD markers and PFGE (electrophoretic karyotype). Cytological studies of the conidia, conidiogenesis and heterokaryotic colonies were also performed. The genotypes of the majority of the recombinant strains analyzed were similar to only one of the parental strains and the low frequency of polymorphic RAPD bands suggested that the nuclear fusions may not occur into the heterokaryon. In some heterokaryotic regions the existence of intensely staining hyphae might be related to cell death. We proposed that a mechanism of somatic recombination other than parasexuality might occur, being related to limited vegetative compatibility after postfusion events, as described for other Trichoderma species.  aSomatic recombination1 aHUNGRIA, M.1 aPIZZIRANI-KLEINER, A. A.  tBrazilian Journal of Microbiologygv. 42, n. 4, p. 1625-1637, Oct./Dec. 2011.