[PIPS/PIT] Fruits et légumes avec ou sans pepin

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de : Laetitia
le :jeudi 09 octobre 2008 a 12h21

Salut (hallo everybody, if you prefer),
ouvrir plusieurs variétés d'avocats (fruit de l'avocatier), il y aurait
toujours qu'un seul gros pépin (noyau) ?
Trancher plusieurs variétés d'oranges, certaines contiendraient de
petits pépins, et (ou) d'autres pas (fruit de l'oranger) ?
Navel orange: autre,s singularité,s ?
[EN/MODE: COPY ON]
http://en.wikipedia.or....:Navel orange sectioned.jpg
A peeled sectioned navel orange*.
The underdeveloped twin is located, on the right bottom?
A *single mutation in 1820*, in an orchard of sweet oranges planted at
a monastery in Brazil yielded the navel orange, also known as the
Washington, Riverside, or Bahie navel.
The mutation causes navel oranges to develop a second orange at the
base of the original fruit, opposite the stem.
The second orange develops as a conjoined twin in a set of smaller
segments embedded within the peel of the larger orange.
From the outside, the smaller, and undeveloped twin leaves a formation
at the bottom of the fruit that looks similar to the human navel.
Because the mutation left the fruit seedless and, therefore, sterile,
the only means available to cultivate more of this new variety is to
graft cuttings onto other varieties of citrus tree.
Two such cuttings of the original tree were transplanted to Riverside,
California, *in 1870*, which eventually led to worldwide popularity.
Today, *navel oranges continue to be produced via cutting and
grafting.
This does not allow for the usual selective breeding methodologies, and
so not only do the navel oranges of today have exactly the same genetic
makeup as the original tree, and are therefore clones; in a sense, all
navel oranges can be considered to be the fruit of that single, over a
century-old tree.
On rare occasions, however, further mutations can lead to new
varieties.
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EN signifierait [Education Nationale] ?
Lien avec le musée de l'Orangerie, situé dans le jardin des Tuileries à
la cité de Paris, (en) région france ?
Merci (and/or thanks, if you prefer), but fu2:fr.sci.zetetique.

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