Genetic variability and nature of intergeneration association in yield and its components in potato

The segregating population was studied for association between yield and its components within and between four successive generations. The normal and partial correlation coefficients showed that for tuber yield: 1) in the seedling generation, tuber number was more important than individual tuber weight; 2) in the first clonal generation, both tuber number and their weight were equally important; and 3) in the second and third clonal generations, tuber size was much more decisive than their number. But stability of the associations and intergeneration correlation coefficients showed that out of tuber weight and tuber number, both of which are positively associated with tuber yield but negatively among themselves, tuber weight could serve as a more reliable parameter of tuber yield.