The invention provides a process for selecting banana clones that are characterized by increased bunch weight and by increased total fruit yield, which process is based on somaclonal variation and comprises the steps of initiating tissue cultures from apical meristem explants, and propagating and rooting the same; hardening, potting, and growing in vivo, plants propagated in the previous step; forming a mat from a cluster of plants grown in the previous step originating from the same clone; planting the mats from the previous step in a field, and growing them under conditions of abiotic stress, the conditions including the growth of the mats in an area wherein the average winter night temperature is below 10.degree. C.; measuring bunch weight and total fruit yield of the mats for a period of at least 3 years and selecting mats, the plants of which exhibit the best characteristics of increased bunch weight and increased total fruit yield; and utilizing mats selected in the previous step for preparing apical meristem explants.