胡萝卜主要产量性状杂种优势及配合力分析

以３个不育系为母本，４个自交系为父本，按不完全双列杂交法配制１２个组合，进行杂种优势和配合力分析。结果表明，小区产量、单根重、根长和根粗均表现了明显的正向杂种优势，以小区产量和单根重的杂种优势较高；亲本一般配合力效应比组合特殊配合力效应更为重要，其中父本的作用大于不育系的作用；３０株系（Ｂ_３）小区产量、单根重、根长和根粗的一般配合力具有较大的正向效应值，丹富士分离株系（Ａ_２）心柱比例具有较大的负向效应值。从根形、根色及整齐度来看以丹富士分离株系（Ａ_１、Ａ_２）作母本，Ｂ_３为父本更为理想。

Analyse of Heterosis and Combining Ability for Main Yield Characteristics in Carrot

Heterosis and combining ability were analysed for 12 combinations by incomplete dialle of 3 strile lines and 4 inbred lines. The results showed: positive heterosis occured in plot yield, single root weight, root length and width. Heterosis of plot yield and single root weight were the highest, General combining ability was more important than specific combining ability.General combining ability of 30 family (B_3) indicated had higher positive values for plot yield,single root weight, root length and width. Core proportion of A_2 derived from Dan Fushi showed higher negative values. The possibility of these lines in future breeding was dissussed.