01984naa a2200205 a 450000100080000000500110000800800410001902400390006010000200009924500940011926000090021352013630022265000250158565300260161065300140163665300290165070000180167970000160169777300650171316597062023-06-26       2009    bl uuuu     u00u1 u    #d7 a10.1016/j.scienta.2009.07.0052DOI1 aSOUZA, M. C. de  aEvaluation of tangerine hybrid resistance to Alternaria alternata.h[electronic resource]  c2009  aThe Alternaria Brown Spot, caused by Alternaria alternata, is a major fungal disease in some kinds of tangerines, tangor, mandarins and pomelos. In Brazil as well as worldwide, A. alternata can cause necrosis in fruits, branches and leaves, causing substantial profit loss. In the present research, in laboratory conditions and in the field, we evaluated the resistance to the fungus, in leaves and fruits, for 22 varieties and hybrids of tangerines. To this end, we evaluated genotypes belonging to the Germplasm Bank of the Estação Experimental de Citricultura de Bebedouro. The resistant genetic materials (found in leaves and fruits) represented four varieties of clementines (Citrus clementina); six varieties of mandarins (two belonging to C. reticulata, two to C. tangerina, one to C. deliciosa and one to C. nobilis); one tangelo (C. tangerina x C. paradisi); two mandarin hybrids (one resulting from crossing C. nobilis x C. deliciosa and the other from crossing C. clementina x C. reticulata); one tangor hybrid (C. clementina) and two satsuma hybrids (C. unshiu x C. deliciosa). We also determined a relation between the inoculation of leaves and fruits. The resistance and susceptibility following inoculation in leaves and fruits supports a relationship between these organs and the physiological responses observed for the valuated genotypes.  aAlternaria Alternata  aAlternaria brown spot  aCitrus sp  aSpot Varietal resistance1 aSTUCHI, E. S.1 aGOES, A. de  tScientia Horticulturae, Amsterdamgv.123, n.1, p. 1-4, 2009.