This .t~dy concerns th. ~atur. of ge~e action of common .mut resistanc. and som. oth.r eCOnOlll1.C characters in ·'!Iaiae by m.ans of as: 5 diaZZeL c:r.aLlIsiB. The additi.ve gen~ti.c :lariatiOIl pLayed the .ajor rei. ill fUprusion Of the uudied traits. The degree Of dominance :Jas in :119 compL.te r2nge. The frequellcy 0/ positive alld nega:iue gell.s :JaB 1I0t equaL ill the par ene«, :hre. pairs 0/ gll1:es w.re governed th. inheritanc. Of cO~'!Ion smut: ;:oesiscc:r.ce PLant 1aeight: and 100 le.rnaL :Jei;ilt.· eeri~abi:itil utir.:a.tilS based on lIarro/J and broad s e ns « :Jere o/'!Ioderate s c or e s , CorreLation coefficient: bet/Jeen (ill" ~ Yr) and ('/1"), showed that the illcreasing genes /Jere dc~inant for most Of cilaracterB. Common smut r.action /JaB ;;ositiveLy correLated /Jith pLallt h.ight, /J1aiIa lIegativeLy corr.tated :Jith 100 k.rneL /Jeight.