Selection of potato clones from biparental crosses, open pollinated and self pollinated families

Abstract

Different types of potato clonal families were evaluated in order to check the possibility to perform selection in open pollinated and self pollinated families as compared to biparental crosses. Two experiments were carried out in Maria da Fé and Lavras counties, MG, Brazil. Averages of clones from biparental crosses and open pollination were similar, showing the possibility of selection in the open pollinated families. Genetic variability and heritability among clones frorn open pollinated families were of the same magnitude as those obtained from the biparental clones, allowing similar genetic gains for both types of families. Clones from self pollination presented low probability of success with selection. In general, the self pollinated families presented reductions in their averages of 39% for marketable tuber yield, 29% for number of marketable tubers, 33% for percentage of high graded tubers, 30% for mean weight of high graded tubers and 23% for mean weight of marketable tubers, as compared to the biparental and open poilinated families.