• Centre of origin: Peru, Equador and Bolivia
  • Ploidy level: 2n= 2x=24
  • Tomato Solanum lycopersicum Mill. (syn.Lycopersicon esculentum) is one of the most important warm-season fruit vegetables grown throughout the world. Among the vegetables, maximum attempts have been made to improve this crop.
  • Short duration of crop, easiness in cultivation and a large number of seeds per fruit has made it an ideal crop for many research works.
  • Tomato is a native of Peru in South America. The crop spread to North America primarily by migrating birds.
  • The largest concentration of wild tomatoes is present in Mexico.
Floral biology
  • Dehiscence of anther occurs 1-2 days after the opening of corolla.
  • It occurs from base to top and is longitudinal. It is mainly self-pollinated but certain percentage of cross-pollination also occurs.
  • If the pollen is shed as the style grows up through the anther tube, self fertilization is the rule.
  • Self-pollination also takes place when the style is short and the stigma is not extroverted beyond the connivent anther.
  • A certain degree of cross-pollination happens when the stigma protrudes outside the level of anther (extrovert).
Breeding goals
  • Earliness
  • Increased fruit yield
  • Fruit quality
  • Indeterminate cultivars for green house production
  • Resistance to disease (Wilt,Tospo virus,TLCV, blight, anthracnose, mosaic and root knot nematode)
  • Resistance to insects (Fruit borer, whitefly)
  • Resistance to abiotic stresses
  • Cold set varieties
  • Hot set varieties
  • Drought tolerance
  • Salt tolerance
  • Low temperature germination and growth
  • Chilling injury tolerance
  • Herbicide tolerance
  • Tomato is a true diploid with 2n=24. Haploids, tetraploids, trisomics and monosomics have also been produced in the tomato.

Last modified: Monday, 2 April 2012, 11:29 PM