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Lemons & Oranges from Pips ?
In article ,
writes I have been told by a professional citrus grower that lemon and orange plants grown from pips seldom flower or fruit. Is this likely to be an accurate statement ?? In the case of citrus, there is at least some chance that seedlings will in fact be clones of the parents. While I can't find the reference I'd like, I believe that the term for this is adventitious embryony, and you can get some confirmation by searching the web. For instance, at http://thecity.sfsu.edu/~sustain/chap8.html I find 2.1 Adventitious embryony in Citrus Citrus commonly reproduces by an asexual process called adventitious embryony (Koltunow 1993). The offspring are genetically identical with the maternal parent because the embryo of the seed derives exclusively from maternal tissue. The tissue is called the nucellus, and in all sexual plants it supplies nutrients to the unfertilized egg and then, after fertilization, to the embryo and endosperm. The adventitious embryo derives not from the fertilized egg cell but from a group of cells (a proembryo) formed in the nucellus (Koltunow et al. 1995). This asexual process in Citrus keeps the line pure and predictable in its fruiting and other characters, but it also prevents citrus breeders from improving their lines through sexual hybridization with a contrasting cultivar. Of course, this doesn't help you with the practicalities of growing the things in the British climate. -- A. G. McDowell |
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