Karyotyping of Plants

Genetics as it applies to evolution, molecular biology, and medical aspects.

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Karyotyping of Plants

Post by dustpops » Wed Feb 04, 2009 12:49 pm

I would like to know the significance of chromosome counting.
What will be its use?

For example I will do karyotyping(counting, chromosome measuring, and centromere position) in the genera of Mangnifera and Mauria which belongs to family Anacardiaceae.

What can I conlcude after comparing the two two karyotypes of different genera
How can I use the data to determine relationship between the two?
I would really appreciate your help. Thanks. :D

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Post by domwood » Mon Feb 09, 2009 7:31 pm

The number of chromosomes and their ploidy are somewhat arbitrary and you will probably find it difficult to infer anything from comparing karyotypes. For example cats have 38 chromosomes, Humans 46, Dogs 78, and they are all mammals, trying to infer any 'relationship' would be difficult.

It's not something i've ever hear of, but if you do want to try to see if you could infer a relationship, you would probably need to find one or more other species of known relationship to one of your species, so that you have some sort of comparison.

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Post by mith » Mon Feb 09, 2009 10:54 pm

Unless you know the sequence or some other additional information, it's not useful. For example, some postulate that humans evolved by some ploidy mutation from the ape/chimp/human common ancestor. But you can't confirm that using just ploidy.
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