Abstract：
:A cline in the frequency of melanic morphs of the two-spot ladybird, Adalia bipunctata, was first surveyed in 1980 along a transect extending inland from the coast in the Netherlands. At that time, the frequency of melanics increased over some 40 km from 10% near the coast to nearly 60% inland. Additional surveys made in 1991 and 1995 demonstrated some progressive change in cline shape. New samples from 1998 and 2004 confirm these dynamics, and show that over a period of about 50 generations for the beetle, the cline had decayed rapidly to yield rather uniform frequencies of melanic morphs at around 20% along the whole transect by 2004. Climate data and evidence for thermal melanism in this species support our contention that these dynamics reflect a dramatic example of a rapid genetic response within populations to climate change and local selection.
journal_name
Heredity (Edinb)journal_title
Heredityauthors
Brakefield PM,de Jong PWdoi
10.1038/hdy.2011.49subject
Has Abstractpub_date
2011-12-01 00:00:00pages
574-8issue
6eissn
0018-067Xissn
1365-2540pii
hdy201149journal_volume
107pub_type
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