The researchers studied 23 different types of tomatoes to see how they vary genetically. They found that some traits like fruit weight, plant height, and number of fruits per plant had a wide range among the genotypes. The study showed that traits like number of fruits per plant, fruit weight, and fruit yield had high heritability and genetic advance, making them good for improving crops through direct selection. This means that these traits are strongly influenced by genetics and can be easily improved in future tomato varieties.