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Thread: looking for N. khasiana male

  1. #9

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    Quote Originally Posted by [b
    Quote[/b] (Tony Paroubek @ April 22 2004,11:29)]As far as I am aware no study has been done to determine the normal percentage male:female. If there has and I missed it.. please enlighten me as to where.
    Quote Originally Posted by [b
    Quote[/b] ]Ok so let me get this straight.. you guys figure the sex ratio in Nepenthes is 7 male to 3 female. And your basing this on the highly scientific study of how many posts you see of people looking for pollen vs those with pollen to give away.

    As far as I am aware no study has been done to determine the normal percentage male:female. If there has and I missed it.. please enlighten me as to where.
    No, I've seen it on a few websites, and I THINK in a book by charles clarke. I will go look for both referances now, and let you know.
    Quote Originally Posted by [b
    Quote[/b] ]ok so what if only one plant had been brought into cultivation and everyone has that single plant only? I guess the ratio would be 10:0? What if 2 plants of opposite sex are in cultivation but after 20 years of making cuttings 7 people have clone a while 3 people have clone b. Does this make the ratio 7:3 when it started at 1:1?
    Good point... I didn't say of a particular species, just average ;p

  2. #10

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    found one of about 5 references:
    Nepenthes sex ratio (click)

    On the page, it says:
    Quote Originally Posted by [b
    Quote[/b] ]Nepenthes plants have set genders so sexual reproduction can only take place if 2 plants, a male and a female, are present. The small flowers nave no petals, 4 sepals and stamens or pistils at the center of the flower. The flowers are not showy; therefore Nepenthes are usually admired for their beauty of their pitchers. The male to female ratio is about 75:25 percent. Female plants are not as common as male plants in the Nepenthes world.

  3. #11
    Tony Paroubek's Avatar
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    No offense to Zongyi who is a nice fellow.. but anyone can make a statement on a website. This does not make it a fact. Where is the reference to the scientific literature that details the study?

    BTW incase your wondering.. Charles Clarke Nepenthes of Sumatra and Peninsular Malaysia Pg. 69
    In closed habitat the sex ratio is closer to 1:1 with a small bias AGAINST males (approximately 2male:3female) although in some species such as N. gracilis the bias was significant with even more females to males.
    In harsher open habitat the ratio was more males to females in some cases all male. Charles hypothesizes that the males are better able to live in the more hostile environment. Which is a reasonable explanation for why no females would be found when surely they must exist somewhere. If this is the case and in certain habitat one sex has the advantage for survival over the other these ratios should be thrown out as the overall ratio since they are biased by environmental factors and not an indication of the true ratio present in a seedling population.

    be careful what you post
    Tony



    Is that a Nepenthes in your pocket or you just happy to see me?

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    Arrow

    [img]http://www.**********.com/iB_html/non-cgi/emoticons/smile.gif[/img] Darn... You always prove me wrong! [img]http://www.**********.com/iB_html/non-cgi/emoticons/biggrin.gif[/img] [img]http://www.**********.com/iB_html/non-cgi/emoticons/tounge.gif[/img]

  5. #13
    SirKristoff is a poopiehead Ozzy's Avatar
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    Quote Originally Posted by [b
    Quote[/b] (Spectabilis73 @ April 22 2004,3:17)][img]http://www.**********.com/iB_html/non-cgi/emoticons/smile.gif[/img] Darn... You always prove me wrong! [img]http://www.**********.com/iB_html/non-cgi/emoticons/biggrin.gif[/img] [img]http://www.**********.com/iB_html/non-cgi/emoticons/tounge.gif[/img]
    I wonder why?

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