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The second reason for
destabilization of names is the application of nomenclatural rules,
which have been modified from time to time, to provide for stability
in the names of taxa. For instance, in Tokyo code, a provision has
been made for conservation of names of species without any
restriction (earlier the names of only species of economic importance
could be conserved). As a means to provide stability of names ,
Brummitt (1987) also proposed the preparation of lists of "Names in
Common Use or NCUs", which would take precedence over any names not
so listed. At least three such lists of NCUs have already been
published. The issue of NCUs, which was deferred in Tokyo congress,
is likely to be approved in 1999 congress to be held at St. Louis,
Missouri, USA.
In conclusion we may like to say, that although there is lot of
confusion in the tribe Triticeae due to frequent changes in the names
of taxa, the steps being taken by the Nomenclature Section of the
International Botanical Congress will go a long way in providing
stability of names by discouraging changes in names, wherever the new
conservation/rejection avenues and the lists of NCUs can be helpful.
It may be useful to give a call to wheat workers through the medium
of WIS that only the name Ae. squarrosa be used for the D
genome species and that restrain may be exercised in using altered
names, whenever proposed. It may also be desirable to persuade the
organizers of the 9th International Wheat Genetics Symposium (IX
IWGS, to be held in Saskatoon, Canada, during August 2-7, 1998), to
organise a workshop on the nomenclature and taxonomy of the tribe
Triticeae, so that the nontaxonomist users of nomenclature become
aware of the dangers and implications of using new names.
References
Baum BR, Estes JR and Gupta PK (1987) Assessment of genomic
system of classification. Amer J Bot 74:1388-1395.
Bowden WM (1959) The taxonomy and nomenclature of the wheats, barleys
and ryes and their wild relatives. Can J Bot 37: 659-684.
Brummitt RK (1987) Will we ever achieve stability of nomenclature?
Taxon 36:78-81.
Dewey DR (1984) The genomic system of classification as a guide to
intergeneric hybridization with the perennial Triticeae. In:
Gustafson JP (ed) Gene manipulation in plant improvement Plenum Publ
Corp. 209-279.
Gupta PK and Baum BR (1986) Nomenclature and related taxonomic issues
in wheats, triticales and some of their wild relatives. Taxon
35:144-149.
Gupta PK and Baum BR (1989) Stable classification and nomenclature in
the Triticeae: desirability, limitations and prospects. Euphytica 41:
191-197.
Kerguelen M (1980) Proposal on Article 57.2 to correct the
Triticum example. Taxon 29: 516-517
Love A (1984) Conspectus of Triticeae. Feddes Repertorium 95:
425-521.
Nicolson DH and Greuter W (1994) Guidelines for proposals to conserve
or reject names. Taxon 43:109-112.
Yen C, Yang JL and Yen Y (1997) The history and the correct
nomenclature of the D genome diploid species in Triticeae (Poaceae).
Wheat Inf Serv 84: 56-59.
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