马铃薯品种大西洋不同杂交组合后代的产量表现

以马铃薯品种大西洋为母本的6个杂交组合的无性一代为试验材料,对组合的各个产量性状进行评价。结果表明:综合表现较好的组合为大西洋×D2和大西洋×早大白,这两个组合产量高,单株商品薯重也较高,平均单株产量分别为621.6 g和511.0 g,平均单株商品薯重分别为426.9 g和409.2 g;尤其是大西洋×早大白组合,后代的单株结薯数量较少(4.9个),且单薯重高(107.9 g),是大薯块类型的高产组合。大西洋×克新16号组合和大西洋×T1800组合的产量中等,可结合其它性状评价其利用方向。大西洋×克新2号组合的产量较低;且单株商品薯重也较低(187.7 g),是利用价值较小的组合。大西洋×中薯4号组合的平均单株产量低(380.7 g),但单株结薯数量少(4.5个),因而单薯重较高(93.5 g),可以选择高产的单株进一步鉴定。

Yield Performance of Progenies Derived from Crosses Using the Cultivar Atlantic as Female Parent

The performance of yield and its components were evaluated for 6 crosses using cv.Atlantic as female parents in the first clonal generation.The crosses,Atlantic × D2 and Atlantc × Zaodabai,performed well,with high total yield and marketable yield,which were 621.6 g and 511.0 g,and 426.9 g and 409.2 g on the basis of a hill,respectively.Particularly,the cross,Atlantic × Zaodabai,was more promising,in view of its low tuber set(4.9) and high mean tuber weight(107.9 g),therefore,it can be considered a type of cross with its progenies tending to have high tuber yield but few tuber set.The crosses,Atlantic × Kexin 16 and Atlantic × T1800,had a medium yield,and their use in potato breeding can be determined with considerations of other traits.The cross Atlantic × Kexin 2 had low total yield and low marketable yield(187.7 g·hill-1) as well,and therefore should be abandoned.The cross Atlantic × Zhongshu 4 had low total tuber yield(380.7 g·hill-1),and low tuber set(4.5),leading to a high mean tuber weight(93.5 g).High yield genotype should be selected in this cross for their further evaluation.