胡萝卜主枝花序及种盘性状的关联分析

对7个亲缘关系较远的胡萝卜常规品种的花序类型、形态特征及相应的种盘类型、种子产量和质量性状进行调查分析。结果表明,7个品种盛花期钟铃型花盘所占比率最多,半铃型稍次之,平盘型最少。钟铃型花盘的面积、总小花数显著高于其他类型花盘。结实后,钟铃型花盘多形成平头型种盘,平盘型花盘多形成闭合型种盘,半铃型花盘则多形成平头型与杯碗型种盘。比较3种种盘类型的种子产量和质量,平头型种盘各指标均优于闭合型和杯碗型种盘,其单种盘产量最高,种子最大,最为饱满,发芽率和发芽势最高,电导率最小。

Correlation Analysis of Primary Umbel and Seed Umbel Characters in Carrot

To clear the genetic pattern of primary umbel types in carrot（Daucus carota L. var. sativa DC.），the umbel type，morphology characteristics and corresponding seed umbel type，seed yield and quality trait of 7 conventional carrot varieties were investigated and analyzed. The results showed that bell umbels accounted for the most，semi-bell was second，and flat umbels took minimum percentage during flowering in these 7 carrot varieties. Total floret number and umbels area of bell type were significantly higher than that of other types. After pollination，bell umbels formed flat seed umbels mostly，while those with flat shape flowers produced mostly closed type of seed umbels. Semi-bell shape always formed flat type and cup type seed umbels. Comparing yield and quality of these 3 types of seed umbels，various indexes of flat type were better than the closed type and cup type. The yield of single flat type seed umbels was the highest，its seed size was the biggest and full，germination percentage and germination energy were maximum，and its EC was minimum.