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  • 2 Post By wolf71758
  • 4 Post By Ron-NY
  • 5 Post By raybark
  • 1 Post By gnathaniel
  • 2 Post By PaphMadMan

How are the names of crosses/progeny set?

This is a discussion on How are the names of crosses/progeny set? within the New Growers: Ask the Senior Members forums, part of the New Growers category; A few basic questions as I try to expand my understanding... When reading a tag ...

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  1. #1
    wolf71758's Avatar
    wolf71758 is offline Senior Member
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    Default How are the names of crosses/progeny set?

    A few basic questions as I try to expand my understanding...

    When reading a tag on a cross, is the seed parent always listed first and the pollen parent second?

    Do the progeny have the same name regardless of which is the seed parent and which the pollen parent?


    Blc Bold Red x Blc Goldenzelle = Blc Scott Ware (from OrchidWiz Express)


    Blc Goldenzelle x Blc Bold Red also Blc Scott Ware?

    Would we expect the two crosses to be similar in appearance?

    Here's a photo of the cattleya that's brought these questions to mind.
    Specifically: Blc Goldenzelle x Blc Bold Red

    Name:  Goldenzelle x Bold Red.jpg
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  2. #2
    Ron-NY is offline rothaholic
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    The tag is suppose to list the the seed (pod) parents first, then the pollen parent. Switching parents can make a difference in some crosses for certain traits. One also has to remember that there usually is a great variety of variance with most crosses. Yes, if it is an already registered cross, the reverse has the same name.

  3. #3
    raybark's Avatar
    raybark is offline Senior Member
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    The order of parentage is easy to remember - "Ladies first!" - i.e., the "pregnant" one, having to carry the progeny to birth.

  4. #4
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    gnathaniel is offline Senior Member
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    From what I've been told the differences between reciprocal crosses have to do with which plant contributes the mitochondrial/plastid DNA, which comes from the maternal (pod) parent. Since plastids (eg, chloroplasts) do a fair bit of metabolic work in plant cells, choosing which direction to make crosses can have significant, if sometimes subtle, effects in a breeding program.

  5. #5
    PaphMadMan is offline Senior Member
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    Confirming the information above, and adding a bit...

    Yes, the pod parent should be listed first in a cross. For the official registration it will always be listed with the original pod parent first, but the name applies to the reicprocal cross too.

    Yes, the biggest and most easily identifiable reason why reciprocal crosses may be somewhat different is the inheritance of mitochondria and plastids only from the pod parent. Mitochondria process energy; and plastids perform photosynthesis and store starch, among other functions. This can influence general vigor and temperature and light preferences. It can be unpredictable though since the mitochondria and plastids end up in a 'foreign' cytoplasm and no way to know how it will affect them, maybe ways that aren't obvious from those primary functions. Since plastids also contain pigments, yellow/orange as well as green, they can also influence presence/absence and distribution of those colors in flowers.

    Note that the mitochondria and plastids come not just directly from the pod parent, but through the maternal line all the way back... from the pod parent of the pod parent of the pod parent of the pod parent, etc. Except in simple first and second generation hybrids it may be impossible to know what the true maternal line is at every generation back to species.

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