马铃薯品种大西洋不同杂交组合后代的产量表现

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

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。

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 x Kexin 2 had low total yield and low marketable yield （187.7 g·hil1^-1） as well, and therefore should be abandoned. The cross Atlantic x 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.