02067naa a2200241 a 450000100080000000500110000800800410001910000230006024500620008326000090014550001110015452012610026565000200152665000230154665000300156965000200159965300330161970000210165270000170167370000180169070000280170877300890173618642832018-04-30       2010    bl uuuu     u00u1 u    #d1 aSILVA, S. D. V. M.  aParent selection for cocoa resistance to witches'- broom.  c2010  aTítulo em português: Seleção de progenitores de cacaueiro quanto à resistência à vassoura?de?bruxa.  aThe objective of this work was to identify genotypes with high general combining ability for resistance to witches'-broom (Moniliophthora perniciosa) in populations formed from a first cycle of recurrent selection. Highly productive and resistant clones from different origins were interbred using the North Carolina II design. The clones SCA 6, CSUL 7, RB 39, CEPEC 89, OC 67, BE 4, EEG 29 and ICS 98 were used as paternal parents, while the maternal ones were NA 33, CCN 10, IMC 67, P 4B, CCN 51, CEPEC 86, SGU 54 and ICS 9. Twenty days after germination, 56 seedlings of each cross (four replicates of 14 seedlings) received the inoculation of a 1-mL suspension with 7.5x104 basidiospores mL?1. Symptoms were evaluated 60 days after inoculation. Significant differences were observed among paternal and among maternal parents, for resistance to witches'-broom assessed according to the proportion of progeny seedlings with the disease symptoms. Differences were also observed between groups of mothers or fathers previously defined as resistant, and groups previously defined as susceptible. It is possible to obtain a combination of genes that can increase the level of resistance to witches'-broom directly from the first cycle of recurrent selection.  aEarly selection  aGenetic resistance  aMoniliophthora perniciosa  aTheobroma Cacao  aDisease integrate management1 aLUZ, E. D. M. N.1 aPIRES, J. L.1 aYAMADA, M. M.1 aSANTOS FILHO, L. P. dos  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 45, n. 7, p. 680-685, jul. 2010