TY - JOUR
T1 - Landscape-level patterns of elevated fs1 asian allele frequencies in populations of gypsy moth (lepidoptera
T2 - Erebidae) at a northern U.S. boundary
AU - Streifel, Marissa A.
AU - Tobin, Patrick C.
AU - Hunt, Lucia
AU - Nadel, Hannah
AU - Molongoski, John J.
AU - Aukema, Brian H.
N1 - Publisher Copyright:
© The Authors 2017. Published by Oxford University Press on behalf of Entomological Society of America.
PY - 2017/4
Y1 - 2017/4
N2 - From a regulatory perspective, Asian gypsy moth is a species complex consisting of three species of Lymantria and two subspecies of Lymantria dispar (L.), differing from the European subspecies, L. dispar dispar (L.), by having consistently flight-capable females. As such, the invasion potential in North America is thought to exceed that of European gypsy moth. USDA-APHIS therefore has a monitoring program to detect Asian gypsy moth at highrisk introduction pathways. Molecular markers are used to improve the diagnosis of Asian gypsy moth. One such marker, which targets the FS1 locus, detects an allele, FS1-A, prevalent in Asian populations but occurring at low frequencies (3-6%) throughout the European gypsy moth's range in North America. However, some locales, such as Minnesota, exhibit elevated FS1-A frequencies. We studied the distribution of the FS1-A allele in northern Minnesota, 2013-2014, assessing spatial patterns in the distribution of the FS1-A allele using Moran's I and using spatial regression techniques to examine if the FS1-A allele was associated with putative movement pathways. We also used time series analysis to discern if temporal patterns in FS1-A or possible introduction events occurred. Our results indicated that FS1-A occurred randomly in space and time. We found no evidence that elevated FS1-A frequencies were associated with movement pathways or possible immigration events into this region over the two years. Elevated frequencies of the FS1-A allele within this region could be due to genetic drift and allelic surfing along the expanding population front, or to selection of physiological or behavioral traits.
AB - From a regulatory perspective, Asian gypsy moth is a species complex consisting of three species of Lymantria and two subspecies of Lymantria dispar (L.), differing from the European subspecies, L. dispar dispar (L.), by having consistently flight-capable females. As such, the invasion potential in North America is thought to exceed that of European gypsy moth. USDA-APHIS therefore has a monitoring program to detect Asian gypsy moth at highrisk introduction pathways. Molecular markers are used to improve the diagnosis of Asian gypsy moth. One such marker, which targets the FS1 locus, detects an allele, FS1-A, prevalent in Asian populations but occurring at low frequencies (3-6%) throughout the European gypsy moth's range in North America. However, some locales, such as Minnesota, exhibit elevated FS1-A frequencies. We studied the distribution of the FS1-A allele in northern Minnesota, 2013-2014, assessing spatial patterns in the distribution of the FS1-A allele using Moran's I and using spatial regression techniques to examine if the FS1-A allele was associated with putative movement pathways. We also used time series analysis to discern if temporal patterns in FS1-A or possible introduction events occurred. Our results indicated that FS1-A occurred randomly in space and time. We found no evidence that elevated FS1-A frequencies were associated with movement pathways or possible immigration events into this region over the two years. Elevated frequencies of the FS1-A allele within this region could be due to genetic drift and allelic surfing along the expanding population front, or to selection of physiological or behavioral traits.
KW - Allelic surfing
KW - Lymantria dispar
KW - Movement pathway
KW - Range expansion
KW - Spatiotemporal analysis
UR - http://www.scopus.com/inward/record.url?scp=85019415291&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85019415291&partnerID=8YFLogxK
U2 - 10.1093/ee/nvx041
DO - 10.1093/ee/nvx041
M3 - Article
C2 - 28334091
AN - SCOPUS:85019415291
SN - 0046-225X
VL - 46
SP - 403
EP - 412
JO - Environmental entomology
JF - Environmental entomology
IS - 2
ER -