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Goldfish Diary

Goldfish Breeding - The Vermillion Sakura Singachu

In this issue we feature some updates of the F1 of Vermillion Sakura Singachu. 
There are 3 basic techniques in livestock selective breeding, they are: Inbreeding, Linebreeding and Outcrossing.

In a nutshell:

Inbreeding: where brother-sister, child-parent are bred to one another. Inbreeding enhances desired traits but on the other hand, the undesired traits could also be enhanced. While breeders may be able to breed out physical undesirable traits by careful selective breeding, genetic problems like immunity to diseases, lifespan and fertility may not be easy to sieve out.

A milder form of inbreeding where related bloodline, e.g. cousins are bred together. With a broader but somewhat related gene spectrum, the aim is to maximize the advantage of enhancing the desirable traits while minimizing the risks of inherent genetic problems. 

The direct contrast of inbreeding where 2 unrelated bloodlines are bred together. The result is like a shuffled stacked of cards where the outcome is much less predictable. One reason to outcross is to bring in certain desired traits into the original bloodline. However, desired traits may be bred out and the breeder will need to cross back to the original line in order to bring it back again. At a certain juncture, no breeder can avoid outcrossing to create more hybrid vigour into the original strain. 

With the aim to create a new hybrid of buffalo head sakura Singachu, we closely tracked 3 different combinations of Singachus with a known lineage of sakura ranchu. As expected, very few specimens suitable for future breeding were derived. It is also interesting to study the features of the 3 lines brought about by different combinations of parent fishes. The future breeding plan will be to use the 3 lines to cross amongst each other (linebreeding). 

Line 1

Line 2




3 months old

Quote Mr. Louis Chan, founder of the famous Tung Hoi Aquarium Company - "In goldfish breeding, 1 + 1 ≠ 2". That is, if you breed 2 champion goldfish together, you may not get a champion offspring! The goldfish, having 47 pairs of chromosomes (94 chromosomes) merits a lifetime commitment and passion... and that is exactly what makes breeding goldfish even more challenging and interesting! 

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28 Mar 05



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