马铃薯杂种F_1无性株系产量品质等主要农艺性状研究

A study on main agronomic traits of yield and quality of clone lines of Solanum tuberosum hybrids F_1

为了明确‘J07-2’ב陇薯7号’、‘J07-6’ב陇薯7号’马铃薯杂交组合F1中选出的无性二代株系2-1、株系3-1、株系4-4和株系19-3的产量、品质等农艺特性,对其生育期、株高、薯块特征、单株结薯数、单株产量、平均薯重、商品薯率、块茎干物质含量、淀粉含量、还原糖含量等主要农艺性状进行了测定分析。4个杂种无性株系均为中晚熟类型,生育期127～130d,生长势强,平均株高100cm左右。株系2-1和株系19-3的产量和品质性状表现更为突出,其单株平均薯重、商品薯率和单株产量高,芽眼浅,薯形好,淀粉含量分别为19.22%和21.22%,还原糖含量分别为0.022%和0.045%,是选育淀粉、炸食加工及鲜食品种的优异材料。杂种无性株系单株产量与生育期、株高、单株结薯数、商品薯率均呈显著正相关,平均薯重与商品薯率呈显著正相关,单株结薯数与平均薯重呈显著负相关;淀粉含量与干物质含量呈显著正相关,与平均薯重和商品薯率呈极显著正相关。

In order to clarify agronomic characteristics of asexual second generation lines 2-1,3-1,4 4 and 19-3 selected from two potato combinations ‘J07-2＇X‘LongshuNo. 7＇, ‘J07-6＇X‘LongshuNo. 7＇ hybridF1, the main agronomic traits, such as growth period, plant height, tuber characteristics, tuber number per plant, yield per plant, mean tuber weight, the rate of commercial tuber, tuber dry matter content, starch content, re- ducing sugar content, and other agronomic traits, were determined and analyzed. Four hybrid asexual lines were late-maturing type, growth period was 127 d to 130 d, growth potentials were strong and average plant height was about 100 cm. The yield and quality of line 2 1 and line 19-3 were more prominent, mean tuber weight per plant, the rate of commercial tuber and yield per plant were high, eyes were shallow, tuber shape