Print version ISSN 0103-8478
PIOTTO, Fernando Angelo and PERES, Lázaro Eustáquio Pereira. Genetic basis of growth habit and flowering in tomato and its importance in agriculture. Cienc. Rural [online]. 2012, vol.42, n.11, pp. 1941-1946. ISSN 0103-8478. http://dx.doi.org/10.1590/S0103-84782012001100006.
Hybrids or open pollinated tomato cultivars used for sauces and ketchups production usually has determinate growth habit, while most of the genotypes used in the production to salads (in natura consumption) has indeterminate growth habit. Additionally, growth habit can have influence on culture management, productivity and total soluble solids (TSS) in fruits. The growth habit is mainly controlled by the gene SELF-PRUNING (SP), which is a component of a small gene family which is also part of the gene SINGLE FLOWER TRUSS (SFT), currently considered one of the components so sought after 'florigin'. Understanding the biochemical function and physiological effect of such genes in interaction with the environment and other genes (epistasis), allows the manipulation of parameters such as precocity and TSS. It also provides subsidies to understand the genetic basis of semideterminate growth, which combines the advantages of determinate and indeterminate habit and can be used for plant breeders to development of new cultivars.
Keywords : Solanum lycopersicum; developmental genes; crop breeding.