Monukka and Russian Seedless are the seedless sources of some seedlessvarieties.
无核紫和俄罗斯无核是部分无核品种的原始亲本材料之一；
2
However, the seedlessvarieties being cultivated are almost from the Europe, which have high quality and with poor stress-resistance especially the chilling resistance.
但目前栽培的无核葡萄多为欧洲葡萄品种，虽然品质优良，但抗逆性差，特别是抗寒性差。
3
The non-balance data of the yield characters of seedless watermelon varieties(lines) in the regional trials during 2002~2005 in Hubei was analyzed using rank analysis method.