Parameters of adaptibility and stability of potato varieties of various ripeness groups on productivity and its components in conditions of the Samara area

Results of studying of potato varieties of various ripeness groups on productivity and its components are submitted. Variability and stability of attributes are determined. The varieties most adapted to agro ecological conditions of the Samara area are revealed. The analysis of the received data has shown, that the maximal average productivity characterized group of early varieties (37,7 t/hа). At same group of varieties the minimal factor of a variation and the maximal values of a stability index and stability criterion to this attribute are marked. Early varieties formed productivity due to weight of one tuber. An optimum parity of tubers quantity and weights in this group the variety Meteor differed. The group of semi-early varieties in comparison with early varieties was characterized by lower stability criterion both on productivity as a whole, and on its components. Varieties of this group formed productivity due to various components. The optimum parity of tubers quantity and tubers weights characterized the semi-early variety Brize. Variability of an attribute of productivity at semi-late varieties was lower, than at semi-early group, but higher at early group. On complex parameter, the group of semi-late varieties also borrowed intermediate position between early group and semi-early group. The maximal stability and the minimal variability of an attribute of productivity at varieties Manifest (semi-early), Favorite (semi-late) and Vesna belaya (early) are marked. High stability on two components of productivity at the early variety Uladar is established. The early variety Liga differed the minimal variability and high stability on average weight of one tuber. In various groups of ripeness the varieties of a potato both intensive, and plastic type are revealed.