caa a22 4500 386361916 CHVBK 20180307111918.0 cr unu---uuuuu 161130e198902 xx s 000 0 eng 10.4039/Ent121141-2 doi S0008347X00028583 pii (NATIONALLICENCE)cambridge-10.4039/Ent121141-2 DIAPAUSE INTENSITY IN A FRENCH UNIVOLTINE AND A SASKATCHEWAN COMMERCIAL STRAIN OF MEGACHILE ROTUNDATA (FAB.) [Elektronische Daten] The relative diapause intensity of a French univoltine and Saskatchewan commercial strain of the alfalfa leafcutting bee, Megachile rotundata (Fab.), was evaluated over a 3-year period. Prepupae from both strains underwent diapause development at 10 °C for different time periods. Diapause intensity was estimated by scoring days to emergence after initiating incubation at three different times in each of the 3 years: fall incubation (immediate post harvest); winter incubation; and spring incubation. In all comparisons made, the univoltine strain had a significantly increased diapause intensity compared with the commercial strain. We concluded that diapause intensity was heritable and that this stable difference between strains could provide the basis for a selected line with increased univoltinism under field conditions. Copyright © Entomological Society of Canada 1989 Rank G.H. Department of Biology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 0W0 Rank F.P. Department of Biology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 0W0 The Canadian Entomologist Cambridge University Press 121/2(1989-02), 141-148 0008-347X 121:2<141 1989 121 TCE https://doi.org/10.4039/Ent121141-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.4039/Ent121141-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rank G.H. Department of Biology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 0W0 NATIONALLICENCE 700 1- Rank F.P. Department of Biology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 0W0 NATIONALLICENCE 773 0- The Canadian Entomologist Cambridge University Press 121/2(1989-02), 141-148 0008-347X 121:2<141 1989 121 TCE CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge