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Old 09-12-2014, 10:16 AM
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Question about grex names

Moderators - I was not quite sure where to place this - please move if needed

This is regarding grex names & whether it makes a difference which parent is the pod vs pollen parent. Let's say I make crosses using two imaginary hybrids, we can call them Cattleya Abc and Cattleya Xyz:

Cross 1:
Pod: Cattleya Abc x Pollen: Cattleya Xyz (Let's say the result is a grex registered as Cattleya Abcxyz)

Later a second cross is made:
Cross 2:
Pod: Cattleya Xyz x Pollen: Cattleya Abc

Would the grex from cross 2 also be called Cattleya Abcxyz? This has been asked before - there is a sticky here on orchid nomenclature, http://www.orchidgeeks.com/forum/orc...nclature-2491/, I am just wanting to be sure I am understanding it correctly. The sticky implies the grex name is the same.

BUT -

The reason I ask is that the RHS website for name searches The International Orchid Register / RHS Gardening seems to make a distinction regarding pod and pollen parents - I was wondering if there is a reason why RHS makes that distinction.
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Old 09-12-2014, 01:26 PM
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The RHS database only lists the cross as it was originally registered, the first recorded case, but once registered the grex name applies to the reciprocal cross too. So you always have to check a cross both ways with the International Orchid Register or you might miss it.
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Old 09-12-2014, 01:29 PM
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Thanks - good to know!
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Old 09-13-2014, 06:33 AM
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In some species, especially dioecious types, it makes a difference which plant was the pollen donor and which carried the seeds. Therefore it is also usefull information to record which one was the pollen donor.

Unfortunately grexes dont make this distinction, so plants of the same grex don't neccessarily look the same...

Even worse, grex ab x grex ab is still grex ab. So after a few interbred generations you could have one that looks entirely like parent A and one that looks entirely like parent B and they would still be the same grex, grex ab.
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