02158naa a2200253 a 450000100080000000500110000800800410001910000230006024501030008326000090018650001390019552012620033465000160159665000240161265000170163665300380165365300290169165300150172070000170173570000200175270000210177270000190179377300920181220934192018-07-20       2007    bl uuuu     u00u1 u    #d1 aCERVIGNI, G. D. L.  aInherit ance pattern and selection criteria for resistance to soybean cyst nematode races 3 and 9.  c2007  aTítulo em português: Padrão de herança e critérios de seleção para resistênciaàs raças 3 e 9 do nematóide-de-cisto-da-soja.  aThe objective of this work was to determine soybean resistance inheritance to Heterodera glycines Ichinohe (soybean cyst nematode ? SCN) races 3 and 9, as well as to evaluate the efficiency of direct and indirect selection in a soybean population of 112 recombinant inbred lines (RIL) derived from the resistant cultivar Hartwig. The experiment was conducted in a completely randomized design, in Londrina, PR, Brazil. The estimated narrow-sense heritabilities for resistance to races 3 and 9 were 80.67 and 77.97%. The genetic correlation coefficient (rg = 0.17; p&lt0.01) shows that some genetic components of resistance to these two races are inherited together . The greatest genetic gain by indirect selection was obtained to race 9, selecting to race 3 due to simpler inheritance of resistance to race 9 and not because these two races share common resistance genes. The resistance of cultivar Hartwig to races 3 and 9 is determined by 4 and 2 genes, respectively . One of these genes confers resistance to both races, explaining a fraction of the significant genetic correlation found between resistance to these SCN races. The inheritance pattern described indicates that selection for resistance to SCN must be performed for each race individually.  aGlycine Max  aHeterodera Glycines  aResistência  aLinhagem endogâmica recombinante  aRecombinant inbred lines  aResistance1 aSCHUSTER, I.1 aSEDIYAMA, C. S.1 aBARROS, E. G. de1 aMOREIRA, M. A.  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 42, n. 10, p. 1413-1419, out. 2007