Spontaneous tomato fruit size, shape, and weight mutations and traits evolution

The table grape ‘Victoria’ with a long shaped berry: a potential mutation with attractive characteristics for consumers

“…Spontaneous ‘activation tagging’ mediated by endogenous transposons could represent a genetic mechanism to generate somatic variation that can be readily exposed to natural selection during the life of perennial species, contributing to their adaptation and evolution . In tomato the cause of spontaneous fruit shape and size mutations seemed to be the activity of intragenome mutant factors belonging to the category MGEs, mobile genetic elements, which include transposon, plasmids, retrotransposons, and other genetic structures similar to them . Thus, traditionally, clones are attributed to a variety on the basis of several common ampelographic traits.…”

“…The firmness is measured as a combination of shear and compression and there is a penetration of the skin . Fruit elongation may be related to an increase of its firmness because there are more mechanical tissues and skin per gram of weight as observed in tomato, and a similar consideration can be made for the grape berry.…”

“…These results, given the high level of polymorphism typically shown by these SSR markers in grapevine, clearly indicated that LBV is not a different variety, but a clone of NBV with a difference in berry shape most probably due to the occurrence of a somatic (bud) mutation. In tomato there is the existence of two different genes determining fruit shape, a fruit width gene and a fruit height gene, which are joined into one cluster . Spontaneous ‘activation tagging’ mediated by endogenous transposons could represent a genetic mechanism to generate somatic variation that can be readily exposed to natural selection during the life of perennial species, contributing to their adaptation and evolution .…”

“…Italia recently found in Brazil . In tomato the traits of an ovate, plum, and elongated fruit shape showed to have a monohybrid incomplete recessive inheritance type with respect to the round and flattened round fruit shape trait which dominates …”

Molecular and genetic basis of tomato resistance to major fungal diseases

“…Большая ценность доноров моногенных хозяйственно ценных признаков состоит в том, что селекция новых сортов и линий с их использованием значительно упрощается и превращается в чисто технический процесс их комбинаторики [4][5][6]. В настоящее время при создании сортов и гибридов томата можно успешно применять более 200 моногенно наследуемых признаков, включая маркерные рецессивные признаки и их доминантные аллели.…”