Abstract: ‘Shishu No.2’ is a new potato variety of good fresh eating quality，bred through systematic selective breeding by crossing potato varieties ‘Zaodabai’ and ‘Fevureta’．This variety is of early maturity．Its growth period is about 55 days．It has good tuberization ability．Each plant can produce 3-5 potatoes．Its tuber is of oval shape with light yellow peel and yellow flesh．The dry matter content is 21.79%，starch content is 15.5%，reducing sugar content is 0.55%，VC content is 204.5 mg · kg^-1，crude protein content is 21.5 mg · kg^-1．It is moderate resistant to PVX virus．It can yield about 37.5 t · hm^-2．This variety is
suitable for cultivation in the second cropping area of Hebei Province．

Key words: potato；early maturity；&lsquo, Shishu No.2&rsquo, ；selective breeding

摘要： 石薯 2 号是以马铃薯品种早大白和费乌瑞它杂交种通过系统选育法育成的优良鲜食型马铃薯新品种。早熟，生育期55 d（天）左右；结薯性好，单株结薯 3～5 个；块茎卵圆形，浅黄皮黄肉；干物质含量 21.79%，淀粉含量 15.5%，还原糖含量 0.55%，粗蛋白含量 2.15%，VC 含量 204.5 mg · kg^-1；中抗 PVX 病毒，每 667 m² 产量 2 500 kg 左右，适于河北省二季作区栽培。

关键词: 马铃薯, 早熟, 石薯 2 号, 选育