The dormancy characteristics of different gene type mini-tuber stuffs in potato breeding and their controlling

The dormancy characteristics of three types of mini-tuber stuffs including varieties,hybridized families and self-pollinated families were analyzed in three different techniques of sprout-promotion.The result revealed that two types of families took more sprouting-time(the duration from one sprouting to all)than varieties in three treatments.The differences of the sprouting time of the three type materials were significant in all treatments.Gibberellins treatment can decrease the dormancy-time by 25.0%-62.5% and the sprouting-time by 34.7%-71.4%than that in room temperature for three types of mini-tuber stuffs,but the buds grew thinner and longer.Changed temperature treatment was not effective to decrease the dormancy time of short dormant materials,but can shorten the dormancy-time of the long ones and decrease the sprouting-time by 28.6%-50.0% for three types of mini-tuber stuffs,and the buds grew thicker and shorter.