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  Complex inheritance of larval adaptation in Plutella xylostella to a novel host plant

Henniges-Janssen, K., Reineke, A., Heckel, D. G., & Groot, A. T. (2011). Complex inheritance of larval adaptation in Plutella xylostella to a novel host plant. Heredity, 107(5), 421-432. doi:10.1038/hdy.2011.27.

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 Creators:
Henniges-Janssen, Kathrin1, 2, 3, Author              
Reineke, Annette1, Author              
Heckel, David G.1, Author              
Groot, Astrid T.1, 3, Author              
Affiliations:
1Department of Entomology, Prof. D. G. Heckel, MPI for Chemical Ecology, Max Planck Society, ou_421895              
2IMPRS on Ecological Interactions, MPI for Chemical Ecology, Max Planck Society, Jena, DE, ou_421900              
3Research Group Dr. A. T. Groot, Population Genetics, Department of Entomology, Prof. D. G. Heckel, MPI for Chemical Ecology, Max Planck Society, Jena, DE, ou_421918              

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 Abstract: Studying the genetics of host shifts and range expansions in phytophagous insects contributes to our understanding of the evolution of host plant adaptation. We investigated the recent host range expansion to pea, in the pea-adapted strain (P-strain) of the crucifer-specialist diamondback moth, Plutella xylostella (Lepidoptera: Plutellidae). Larval survivorship on the novel host plant pea and a typical crucifer host (kale) was measured in reciprocal F1, F2 and backcrosses between the P-strain and a strain reared only on crucifers (C-strain). Reciprocal F1 hybrids differed: offspring from P-strain mothers survived better on pea, indicating a maternal effect. However, no evidence for sex-linkage was found. Backcrosses to the P-strain produced higher survivorship on pea than C-strain backcrosses, suggesting recessive inheritance. In a linkage analysis with amplified fragment length polymorphism markers using P-strain backcrosses, two, four and five linkage groups contributing to survival on pea were identified in three different families respectively, indicating oligogenic inheritance. Thus, the newly evolved ability to survive on pea has a complex genetic basis, and the P-strain is still genetically heterogeneous and not yet fixed for all the alleles enabling it to survive on pea. Survivorship on kale was variable, but not related to survivorship on pea. This pattern may characterize the genetic inheritance of early host plant adaptation in oligophagous insect species.

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 Dates: 20112011-06-15
 Publication Status: Published online
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 Identifiers: Other: HEC184
DOI: 10.1038/hdy.2011.27
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Title: Heredity
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 107 (5) Sequence Number: - Start / End Page: 421 - 432 Identifier: ISSN: 0018-067X
CoNE: https://pure.mpg.de/cone/journals/resource/954925403623