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Thread: Male/ female nepenthes

  1. #1

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    Hi,

    Is there a certain standard ratio for what sex seedlings will end up as in this genus, or does it vary species to species?
    I was under the impression at one point females were more rare than males, but some have told me its 50/50.
    Not the most exciting topic, but in case I want to plan for seed of something.

    Regards,

    Joe

  2. #2

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    According to "The Savage Garden", about 70% are male, and only 30% are female.

  3. #3

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    where is the 30%
    George McKay

    In The End We are All Dead
    Florida

  4. #4
    swords's Avatar
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    I think your chances of obtaining males and females of the same species (for species true breeding) are better if you obtain duplicate plants from seperate sources. One plant from supplier X one plant from supplier Y one plant from supplier Z making sure the suppliers don't all buy from the same TC laboratory. Because if the plants at one supplier are all from one invitro flask (the "fastest", most common way that neps are commercially propagated) they will all be whatever sex the parent mericlone clump in the flask is since they are simply clones. Unfortunately No supplier I know sells sexed TC clones, I'd sure like to find a place that did!
    Or another method would be to buy a batch of 10 seed grown seedings
    However you go about it, it's a long ways off before they flower and you can ID their sex. You may end up growing all one sex no matter what you try to ensure sexual diversity in your collection! It's quite unfortunate as there's some hybrids I'd like to try myself (as well as species true breeding), knowing my luck I'll end up with either all boys or all girls! [img]http://www.**********.com/iB_html/non-cgi/emoticons/wink.gif[/img]

    Good luck!

  5. #5
    Tony Paroubek's Avatar
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    Hmm interesting question. I think purely from a hypothetical view that a large enough population of plants raised from seed should give a 50/50 ratio male/female. Usually to be fairly certain of getting one male and one female, plan on 4 seedlings minimum

    Now if your talking about plants from tissue culture or from cuttings that is another story. For example the great majority of N. khasiana available are female. Simply because of the few plants that made it into cultivation they turned out to be female. So the population sample was relatively small to start with and the apparent ratio is skewed drastically.
    Tony
    Is that a Nepenthes in your pocket or you just happy to see me?

  6. #6

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    wow it all sounds just like my stats classes and blahblah~
    =]

  7. #7
    Tony Paroubek's Avatar
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    Statistics it is! Maybe you would like to do the calculations.. my statistics is very rusty ;<

    Odds of getting 4 females if you have 4 plants and the odds of each plant is 50% for turning out female.

    Off the top of my head its .5 x .5 x .5 x .5 = .0625 or 6.25%

    (odds of getting 4 males would be the same so no reason to calculate it.)

    So with 4 plants the odds of getting either 4 males or 4 females is 12.5%
    Tony
    Is that a Nepenthes in your pocket or you just happy to see me?

  8. #8

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    wow add it up to make it 100%. thats alot of plants. to bad the TC lab couldn't just lable them as sex,clone,& ect. it would be alot cheaper
    George McKay

    In The End We are All Dead
    Florida

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