caa a22 4500 477082262 CHVBK 20180405111453.0 cr unu---uuuuu 170330e19960601xx s 000 0 eng 10.1007/BF01969720 doi (NATIONALLICENCE)springer-10.1007/BF01969720 High genetic variability despite haplodiploidy in primitive sawflies of the genus Cephalcia (Hymenoptera, Pamphiliidae) [Elektronische Daten] [A. Boato, A. Battisti] Hymenoptera are haplodiploid and usually display very low genetic variation. Most data concern social or parasiticApocrita, while the little information available for the primitive phytophagous species of the suborder Symphyta is contradictory. The present study is related to seven species of the genusCephalcia, living in coniferous forests of Northern Eurasia and sharing spruce (Picea sp. pl.) as host plant. Individuals from 22 populations belonging toCephalcia abietis, C. alashanica, C. arvensis, C. erythrogaster, C. fallenii, C. fulva, C. klugii from Europe and China were surveyed for genetic variation at 28 loci using enzyme electrophoresis. Pairs of sibling species were recognized withinC. arvensis andC. fallenii, corresponding to different phenological and morphological forms. In the latter case, reproductive isolation in sympatry occurs despite low genetic distance (D=0.059). Large genetic distances and fixed alternate alleles were observed between Chinese and European populations ofC. abietis andC. arvensis. Expected heterozygosity ofCephalcia populations (0.197, SD 0.064) is significantly higher than that of other Symphyta (Tenthredinoidea) (averageH exp 0.059, SD 0.032) (two-tailed Mann-Whitney test, Z=4.39, p<0.01). These data suggest that haplodiploidy per se does not reduce the genetic variation in mostCephalcia populations. Most of the factors that can lower the potential for genetic diversity in a haplodiploid genetic system are not so effective inCephalcia populations, which seem to be comparable to diplodiploid insect populations in diversity. In a few isolated populations the large number of fixed loci and the large genetic distances may support the predicted faster rate of fixation, as a consequence of haplodiploidy. Birkhäuser Verlag, 1996 Hymenoptera nationallicence Symphyta nationallicence haplodiploidy nationallicence heterozygosity nationallicence allozymes nationallicence Boato A. Institute of Agricultural Entomology, University of Padova, Agripolis, I-35020, Legnaro, (Italy) aut Battisti A. Institute of Agricultural Entomology, University of Padova, Agripolis, I-35020, Legnaro, (Italy) aut Experientia Birkhäuser-Verlag 52/6(1996-06-01), 516-521 0014-4754 52:6<516 1996 52 18 https://doi.org/10.1007/BF01969720 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01969720 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Boato A. Institute of Agricultural Entomology, University of Padova, Agripolis, I-35020, Legnaro, (Italy) aut NATIONALLICENCE 700 1- Battisti A. Institute of Agricultural Entomology, University of Padova, Agripolis, I-35020, Legnaro, (Italy) aut NATIONALLICENCE 773 0- Experientia Birkhäuser-Verlag 52/6(1996-06-01), 516-521 0014-4754 52:6<516 1996 52 18 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer