Publication Date:
2000-01-15
Description:
The introduction and rapid spread of Drosophila subobscura in the New World two decades ago provide an opportunity to determine the predictability and rate of evolution of a geographic cline. In ancestral Old World populations, wing length increases clinally with latitude. In North American populations, no wing length cline was detected one decade after the introduction. After two decades, however, a cline has evolved and largely converged on the ancestral cline. The rate of morphological evolution on a continental scale is very fast, relative even to rates measured within local populations. Nevertheless, different wing sections dominate the New versus Old World clines. Thus, the evolution of geographic variation in wing length has been predictable, but the means by which the cline is achieved is contingent.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Huey, R B -- Gilchrist, G W -- Carlson, M L -- Berrigan, D -- Serra, L -- New York, N.Y. -- Science. 2000 Jan 14;287(5451):308-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Zoology, University of Washington, Box 351800, Seattle, WA 98195-1800, USA. hueyrb@u.washington.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10634786" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
*Biological Evolution
;
Drosophila/*anatomy & histology/*genetics
;
Europe
;
Female
;
Geography
;
Male
;
North America
;
Sex Characteristics
;
Time Factors
;
Wings, Animal/*anatomy & histology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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