Emergence Patterns ofDelia radicum(Diptera: Anthomyiidae) Populations from North Carolina and New York
作者:
J. F. Walgenbach,
C. J. Eckenrode,
R. W. Straub,
期刊:
Environmental Entomology
(OUP Available online 1993)
卷期:
Volume 22,
issue 3
页码: 559-566
ISSN:0046-225X
年代: 1993
DOI:10.1093/ee/22.3.559
出版商: Oxford University Press
关键词: cabbage maggot;Delia radicum;biotypes
数据来源: OUP
摘要:
Cabbage maggot,Delia radicum(L.), populations from North Carolina (Fletcher and Scaly Mountain) and New York (Geneva and Highland) were surveyed to detect differences in the emergence pattern of flies from overwintered pupae. Populations from all locations consisted of different proportions of early- and later-emerging individuals. However, populations from New York consisted predominately of early-emerging individuals (≥90%), whereas populations from North Carolina were composed of a higher percentage of later-emerging individuals. Emergence patterns of F1progeny from crosses between early- and later-emerging flies from Scaly Mountain demonstrated that emergence traits were genetically controlled.D. radicumphenology studies in North Carolina suggested that temporal isolation of the two types was halted by an extended period of aestivation during the summer months, which subsequently allowed the two populations to interbreed during the autumn months. The relative proportion of early:late emergers appears to be unstable over time, which may be due to differential mortality factors operating when populations are temporally isolated or due to dominance or recessive factors governing earliness or lateness, or both.
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