Premium
Developmental and phenotypic responses to photoperiod in uni‐and bivoltine Pieris napi in California
Author(s) -
SHAPIRO ARTHUR M.
Publication year - 1975
Publication title -
transactions of the royal entomological society of london
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.865
H-Index - 81
eISSN - 1365-2311
pISSN - 0035-8894
DOI - 10.1111/j.1365-2311.1975.tb00553.x
Subject(s) - voltinism , diapause , pupa , biology , phenotype , photoperiodism , phenology , aestivation , adaptation (eye) , ecology , lepidoptera genitalia , larva , zoology , genetics , botany , gene , neuroscience
SUMMARY1 Coastal Californian Pieris napi are facultatively bivoltine, with two seasonal phenotypes, whereas inland populations from the Inner Coast Ranges and Sierra Nevada are univoltine and monophenic. 2 When reared under continuous light at 25d̀C both coastal and inland stocks produce about 50% diapause pupae, which give rise to vernal‐phenotype adults. Non‐diapause pupae of all stocks give rise to summer‐phenotype adults, even though this phenotype does not exist in the wild in univoltine populations. 3 Univoltinism, which implies developmental suppression of the summer phenotype, is interpreted as a derivative from multivoltinism and an adaptation to host plant phenology.