Re: [Killietalk] Commercial imports; what to label them?

[vkngbar at ix_netcom.com]

I think I give an idea of why some crosses work and other don't. I come from a Horticulture background. They are constantly crosses different species of plants to get hybrids. The main reason some why hybrids are fertile and other aren't is the chromosome pairs. If the pair matched nicely then the organism is fertile. There are hybrids that suddenly be come fertile when the chromosome doubles. Most organism are diploid or the pairs of chromosome. Certain chemicals will double the chromosome count. An example is cotton crosses between two different species and then treated became a tetraploid organism but is now fertile. This treatment usually doesn't work for animals. 

I suspect the crosses have genetics that the pairs are different than will matched correctly. It is possible for fish that appear similar are genetically very different. I know that this is true for some of Corydoras species which look almost identical but genetically very distinct. Someday maybe they have the time to study the gene sequences for different species of killifish and have a better understanding of there relationships to each other. 

I doubt we will save the problem in the next fifteen minutes.

Later,

Scott
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