We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Inheritance and plasticity of adult host acceptance inYponomeutaspecies: implications for host shifts in specialist herbivores.
- Authors
Hora, Katja H.; Roessingh, Peter; Menken, Steph B. J.
- Abstract
Changes in host acceptance is an important factor in the host specialization of phytophagous insects, and knowledge of the genetic organization of this behaviour is necessary in order to understand how host shifts occur. Here we describe the inheritance of adult host acceptance (oviposition) in three closely related species ofYponomeutaLatreille (Lepidoptera: Yponomeutidae), and their interspecific hybrids.Yponomeuta cagnagellus(Hübner), a specialist onEuonymus europaeusL. (Celastraceae),Y. malinellusZeller, a specialist onMalusspp. (Rosaceae), andY. padellus(L.), oligophagous on a number of Rosaceae, were tested for their acceptance of parental hosts in choice tests. Acceptance ofE. europaeusis semi-dominant in hybrids ofY. cagnagellus× Y. padellus, and in hybrids ofY. cagnagellus× Y. malinellus. The dominance of this acceptance was confirmed in oviposition tests with backcross hybrids: backcross hybrids F1× Y. cagnagellusoviposited mainly onE. europaeusand F1× Y. padellusstill deposited more than half of their egg masses onE. europaeus. Reciprocal hybrids did not differ in their host acceptance, indicating that the trait is autosomal. We further studied the effect of larval food on adult host acceptance (‘Hopkins host selection principle’) in split full-sib F1 families. Larval diet influenced oviposition only in one of two hybrid crosses. The F1 hybrid ofY. padellus× Y. cagnagellus, reared onPrunus spinosaL., deposited a significantly lower percentage of egg masses onE. europaeuscompared to their full-sib sisters fed withE. europaeus. We did not find this in the reciprocal cross. However, still more than half of the egg masses are deposited onE. europaeusby hybrids that have no experience on this host. We conclude that the semi-dominant character of acceptance ofE. europaeusand a tendency of Rosaceae-feedingYponomeutato deposit egg masses on this host may have created the opportunity for the host shift of the predecessor ofY. cagnagellusfrom Rosaceae to the Celastraceae. This shift may have been further facilitated by a weak tendency of adults to oviposit on their larval food source.
- Subjects
PHYTOPHAGOUS insects; LEPIDOPTERA; CELASTRACEAE; HERBIVORES; ROSACEAE; LARVAE; PAEDOGENESIS
- Publication
Entomologia Experimentalis et Applicata, 2005, Vol 115, Issue 1, p271
- ISSN
0013-8703
- Publication type
Article
- DOI
10.1111/j.1570-7458.2005.00287.x