Large rainbow trout of 1,0 – 3,5 kg, with well pigmented flesh and attractive exterior has become an ever more popular alternative or supplement to other salmonids. In addition to the positive perception of the rainbow trout in the marked, the general characteristics (robustness, temperature tolerance, intensive flesh colour, growth rate etc.) of the rainbow trout gives this species a competitive edge compared to other salmonids. AquaSearch LATE, has been developed mainly for the production of large well pigmented rainbow trout in freshwater, where the risk of second winter maturation is better reduced to a minimum, and significant seasonal fluctuations in temperature and oxygen saturation is disqualifying triploid fish.

Genetic background and breeding

AquaSearch LATE originates from selected AquaSearch breeding lines, all with focus on reducing the risk of second winter maturation to a minimum and securing maximum growth rate at the same time. Only 4- and 5-year-old first time maturing broodstock is used for breeding as well as commercial batches.

In addition to this, the current AquaSearch LATE breeding programme, is supported by the use of AquaSearch patented “No second winter” genetic marker. Additional use of this marker is offered as optional male contribution in commercial batches, potentially in combination with other QTL’s offered.

General breeding traits

  • Improved growth rate
  • Continued growth after 2,5 kg
  • Reduced risk of second winter maturation (supported by patented genetic marker use)
  • Fillet colour (Supported by use of genetic markers)
  • Improved RTFS resistance (supported by use of up to 10 genetic markers)
  • Improved vibriosis resistance (supported by use of genetic markers)

Optional breeding traits

  • Additional reduced risk of second winter maturation (marker assisted selection)
  • Additional improved RTFS resistance (marker assisted selection)
  • Additional improved vibriosis resistance (marker assisted selection)
  • Improved white spot disease resistance (marker assisted selection)

General characteristics

AquaSearch breeding lines are all rounded by more than 40 years of domestication and selection for growth and appearance, when this is combined with modern “state of the art” breeding techniques, the characteristics of AquaSearch LATE can be summarized as follow:

  • Specific disease-free origin
  • High hatchability (> 95% guarantied*)
  • *Pending recognized hatching conditions
  • Guarantied all female material
  • Only 4- or 5-year-old maturing brood stock used.
  • General stress and disease tolerance.
  • High growth rate
  • Continued growth after 2,5 kg
  • Low feed conversion rate
  • Elongated body shape.
  • Potential high feeding rate