DIRECTIONAL versus STABILIZING SELECTION FOR DEVELOPMENTAL TIME IN NATURAL AND LABORATORY POPULATIONS OF FLOUR BEETLES | Zendy

Peter S. Dawson | Zendy

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DIRECTIONAL versus STABILIZING SELECTION FOR DEVELOPMENTAL TIME IN NATURAL AND LABORATORY POPULATIONS OF FLOUR BEETLES

Author(s) -

Peter S. Dawson

Publication year - 1975

Publication title -

genetics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.792

H-Index - 246

eISSN - 1943-2631

pISSN - 0016-6731

DOI - 10.1093/genetics/80.4.773

Subject(s) - biology , selection (genetic algorithm) , natural selection , cannibalism , directional selection , larva , evolutionary biology , pupa , zoology , genetics , ecology , artificial intelligence , computer science

Artificial selection for fast development is successful in long-established laboratory populations of Tribolium, but not in strains recently derived from natural populations. It is shown that selection against fast development in dense, synchronized cultures operates through cannibalism of early pupae by larvae. Since standard husbandry procedures for laboratory strains involve the periodic creation of dense, synchronized cultures, it is suggested that these populations are subjected to stabilizing selection for intermediate developmental time. Natural populations, on the other hand, are probably subjected to directional selection for rapid development.

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