Genetic analysis of cabbage loopers,Trichoplusia ni(Lepidoptera: Noctuidae), a seasonal migrant in western North America
| Autor: | Judith H. Myers, Michelle T. Franklin, Carol Ritland |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
0106 biological sciences
0303 health sciences education.field_of_study biology Ecology Range (biology) Population 15. Life on land biology.organism_classification 010603 evolutionary biology 01 natural sciences Gene flow Lepidoptera genitalia 03 medical and health sciences Cabbage looper Genetic structure Genetics Trichoplusia Noctuidae General Agricultural and Biological Sciences education Ecology Evolution Behavior and Systematics 030304 developmental biology |
| Zdroj: | Evolutionary Applications. 4:89-99 |
| ISSN: | 1752-4571 |
| DOI: | 10.1111/j.1752-4571.2010.00135.x |
| Popis: | Long-range migrations of many wind-borne noctuid moths will have been influenced by the expansion of agriculture that provides greater availability of food plants along the migratory route. The migratory, agricultural pest, Trichoplusia ni (cabbage looper) over-winters in southern California and each summer migrates as far north as British Columbia. We explored the degree of genetic connectivity of populations over this migratory range. Preliminary investigation of seven mitochondrial gene regions found little to no variation among 13 populations, while partial regions of the NADH dehydrogenase subunits 1 and 4 in 42 individuals revealed eight and six haplotypes, respectively. The pattern of haplotype distribution indicated genetic homogeneity of persistent populations in California but weak differentiation among populations further north. Four highly variable amplified fragment length polymorphism primer combinations generated 167 polymorphic bands, with heterozygosity levels ranging from 0.250 to 0.302. Pairwise FST values and clustering analyses also showed similarty among populations in California with some differentiation among populations initiated from the annual migration. Overall, some differentiation occurs among temporary, annual migratory populations but no pattern occurs with distance from the source population. Population subdivision in British Columbia associated with greenhouses has the greatest impact on genetic differentiation. |
| Databáze: | OpenAIRE |
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