Study On Inheritance Of Bolting Character In Early Cabbage

In the experiment, Seven early cabb8g6 inbred 1ines which had differentresistance to bolting were selected as Wents. Bolting chaIacter of Wentalgenerations, the identification of resistance to bolting, inheritance ofbolting chaIacter and the correlation betW6en bolting date and othereconomical characters were studied. The main resu1ts are as follows fk Seven parents which had different resistance to bo1ting were obtainedfron seventy cabb8ge inbred 1ines which h8d excellent econonical charctersand high cfor)ining ability. Their naJues were A. B. C. D. E. F. G, AInong them, Band C were difficult to bo1ting: E. P. G and H were easy to bo1ting and Awere midd1e type.k The resu1t of identification of resistance to bolting indicated that:The cOInbination of eight 1eaves and 1ow tmperature treatment of 45 d8ys wasthe best condition of appraising bo1ting character.k Inheritance of bolting character of ear1y cabb8ge was in accordancewiththe addi tiv-oninant genetic model. Additive effect was predominant,dominance i5; partial dOIninance. Additive genetic variance was larger thandominant genetic variance. Ear1y bo1ting date shoWs dominant to later bo1tingtime.k Bolting date sas a qllantitative charaCter. The hybridization ofparents which had different bolting date revealed that the first fi1ialgeneration was easy to bo1ting and the second fi1ial generation manifesteditse1f as oontinuous variance. The variance of reciPforal hybrids wnsn'tprominent, Which demonstrated that bolting character was mainly controlledby nuc1ear gene.k Bolt j.ng character was easily affected by environent because of lowheritabi 1ity. so it sas necessare to se1ect in late generations of breeding.k Bo1ting date had proninent POsitive correlation with tight extent ofthe heading, the tight heading is resistant to bo1ting. 0n thecontrare,loose heading sas easy to bo1ting.Postgraduate: Zh8ng taoProfession: Genetics and breeding of cropsTutor: Yice Pro f ng chaO...