loading page

Novel microsatellite markers for Osmia lignaria (Hymenoptera: Megachilidae), a North American pollinator of agricultural crops and wildland plants
  • +6
  • Jonathan Koch,
  • Michael G. Branstetter,
  • Diana Cox-Foster,
  • Joyce Knoblett,
  • Thuy-Tien Lindsay,
  • Theresa Pitts-Singer,
  • Ashley Rohde,
  • James Strange,
  • Kerrigan Tobin
Jonathan Koch
USDA-ARS Pacific West Area

Corresponding Author:[email protected]

Author Profile
Michael G. Branstetter
USDA-ARS Pacific West Area
Author Profile
Diana Cox-Foster
USDA-ARS Pacific West Area
Author Profile
Joyce Knoblett
USDA-ARS Pacific West Area
Author Profile
Thuy-Tien Lindsay
USDA-ARS Pacific West Area
Author Profile
Theresa Pitts-Singer
USDA-ARS Pacific West Area
Author Profile
Ashley Rohde
Utah State University
Author Profile
James Strange
Ohio State University College of Food Agricultural and Environmental Sciences
Author Profile
Kerrigan Tobin
USDA-ARS Pacific West Area
Author Profile

Abstract

Comprehensive decisions on the management of commercially produced livestock, including solitary bees, depend largely on associated knowledge of genetic diversity. In this study, we present novel microsatellite markers to support the breeding, management, and conservation of the blue orchard bee, Osmia lignaria. Native to North America, O. lignaria has been trapped from wildlands and propagated on-crop and used to pollinate certain fruit, nut, and berry crops. Harnessing the O. lignaria genome assembly, we identified 59,632 candidate microsatellite loci in silico, of which 22 were tested using molecular techniques. Of the 22 loci, 14 loci were in Hardy-Weinberg equilibrium (HWE) and demonstrated no linkage disequilibrium (LD) in two Intermountain North American wild populations in Idaho and Utah. We found no difference in population genetic diversity between the two populations, but there was evidence for low but significant population differentiation. Also, to determine if these markers amplify in other Osmia, we assessed 23 species across the clades apicata, bicornis, emarginata, and ribifloris. Nine loci amplified in three species/subspecies of apicata, 22 loci amplified in 11 species/subspecies of bicornis, 11 loci amplified in seven species/subspecies of emarginata, and 22 loci amplified in two species/subspecies of ribifloris. Further testing is necessary to determine the capacity of these microsatellite loci to characterize genetic diversity and structure under the assumption of HWE and LD for species beyond O. lignaria. These markers will help to inform the conservation and commercial use of trapped and managed O. lignaria and other Osmia species for both agricultural and non-agricultural systems.
01 Jan 2023Published in Journal of Insect Science volume 23 issue 1. 10.1093/jisesa/ieac077