GENETIC DIFFERENTIATION IN ZEIRAPHERA-DINIANA (LEPIDOPTERA, TORTRICIDAE, THE LARCH BUDMOTH) - POLYMORPHISM, HOST RACES OR SIBLING SPECIES

Citation
I. Emelianov et al., GENETIC DIFFERENTIATION IN ZEIRAPHERA-DINIANA (LEPIDOPTERA, TORTRICIDAE, THE LARCH BUDMOTH) - POLYMORPHISM, HOST RACES OR SIBLING SPECIES, Heredity, 75, 1995, pp. 416-424
Citations number
38
Categorie Soggetti
Genetics & Heredity
Journal title
ISSN journal
0018067X
Volume
75
Year of publication
1995
Part
4
Pages
416 - 424
Database
ISI
SICI code
0018-067X(1995)75:<416:GDIZ(T>2.0.ZU;2-V
Abstract
Eleven larch- and pine-feeding populations of the larch budmoth were s tudied in Western Europe using 24 allozyme loci. Hierarchical F-statis tics between larch and pine forms (F(ST)approximate to 0.065) were muc h greater than those between localities within larch (F(ST)approximate to 0.002) and within pine (F(ST)approximate to 0.026), even when symp atric host-associated populations were considered. Analysis of Nei's g enetic distance produced similar results, and a UPGMA tree of all popu lations consistently clustered samples from the same hosts together. T hree loci, autosomal Pgm and Mdh-s and sex-linked Idh-s, were the most important loci involved in differences between the two forms. Previou sly considered to be conspecific, it is now clear that the larch and p ine biotypes of Z. diniana are either host races (sensu Diehl & Bush, 1984) or good sympatric species which hybridize rarely. Regardless of taxonomic status, the distribution of larch and pine in the Pleistocen e, phenological differences between the two hosts, together with the g reat vagility of Z. diniana, an outbreak pest, suggest that sympatric or parapatric differentiation is at least as likely as allopatric dive rgence.