(2) Testing of gca( Top Cross;顶交法) Inbred line x complex population(oP population) (3) Testing of sCa( individual cross单交法) Line a x line b line a x line c: line b x line c (4) Combined test( Diallel test双列杂交) For both gCa. sca Line a x line b inex Line c Line a x line c Lineb x line d Linea x line d Linebx line e Linea line e Line c x Line d(2) Testing of GCA (Top Cross, 顶交法) Inbred line x Complex population (OP population) (3) Testing of SCA (individual cross 单交法) Line A x Line B; Line A x Line C; Line B x Line C (4) Combined Test (Diallel Test 双列杂交): For both GCA, SCA： Line A x Line B Line B x Line C Line A x Line C Line B x Line D Line A x Line D Line B x Line E Line A x Line E Line C x Line D … … …