An Attractant Isolated from Female Jeffrey Pine Beetles, Dendroctonus jeffreyi

1979 ◽  
Vol 8 (1) ◽  
pp. 40-41 ◽  
Author(s):  
J. A. A. Renwick ◽  
G. B. Pitman
Keyword(s):  
Dendroctonus Jeffreyi ◽  
Jeffrey Pine ◽  
Pine Beetles

Isolation and endocrine regulation of an HMG–CoA synthase cDNA from the male Jeffrey pine beetle, Dendroctonus jeffreyi (Coleoptera: Scolytidae)

2000 ◽  
Vol 30 (12) ◽  
pp. 1203-1211 ◽  
Author(s):  
Claus Tittiger ◽  
Chatty O'Keeffe ◽  
Cody S Bengoa ◽  
Lana S Barkawi ◽  
Steven J Seybold ◽  
...  
Keyword(s):  
Endocrine Regulation ◽  
Dendroctonus Jeffreyi ◽  
Jeffrey Pine ◽  
Pine Beetle ◽  
Jeffrey Pine Beetle

Male Jeffrey pine beetle, Dendroctonus jeffreyi, synthesizes the pheromone component frontalin in anterior midgut tissue

2002 ◽  
Vol 32 (11) ◽  
pp. 1525-1532 ◽  
Author(s):  
G.M. Hall ◽  
C. Tittiger ◽  
G.J. Blomquist ◽  
G.L. Andrews ◽  
G.S. Mastick ◽  
...  
Keyword(s):  
Pheromone Component ◽  
Dendroctonus Jeffreyi ◽  
Jeffrey Pine ◽  
Pine Beetle ◽  
Anterior Midgut ◽  
Jeffrey Pine Beetle

Allozyme diversity and gene flow in Ophiostoma clavigerum (Ophiostomatales: Ophiostomataceae), the mycangial fungus of the Jeffrey pine beetle, Dendroctonus jeffreyi (Coleoptera: Scolytidae)

1999 ◽  
Vol 29 (3) ◽  
pp. 324-331 ◽  
Author(s):  
Diana L Six ◽  
T D Paine
Keyword(s):  
Sierra Nevada ◽  
Gene Diversity ◽  
Allozyme Diversity ◽  
San Bernardino Mountains ◽  
Dendroctonus Jeffreyi ◽  
Low Genetic Diversity ◽  
Jeffrey Pine ◽  
Sierra Nevada Mountains ◽  
Sexual Recombination ◽  
Mutualistic Association

Genetic variation within and among 10 California populations of Ophiostoma clavigerum (Robinson-Jeffrey & Davidson) Harrington associated with the mycangia of Dendroctonus jeffreyi Hopkins was assessed using allozymes. Gene diversity was uniformly low across all populations, averaging 1.4%. Only 2 of 19 gene loci assayed were polymorphic. The three most southerly populations (two from the San Bernardino Mountains in southern California and one from the southern tip of the Sierra Nevada Mountains) were the most differentiated; however, all populations exhibited very low genetic distance. Several factors alone, or in combination could be responsible for the low genetic diversity observed in these populations including (i) a rarity of sexual recombination, (ii) a history involving genetic bottlenecks, and (iii) selection for a mutualistic association with the host beetle.

Allozyme diversity and gene flow in the bark beetle, Dendroctonus jeffreyi (Coleoptera: Scolytidae)

1999 ◽  
Vol 29 (3) ◽  
pp. 315-323 ◽  
Author(s):  
Diana L Six ◽  
T D Paine ◽  
J Daniel Hare
Keyword(s):  
Genetic Variation ◽  
Gene Flow ◽  
Geographic Isolation ◽  
Average Heterozygosity ◽  
Allozyme Diversity ◽  
Dendroctonus Jeffreyi ◽  
Jeffrey Pine ◽  
Population Average ◽  
Pine Beetle ◽  
Dispersal Behavior

Genetic variation within and among 10 California populations of the Jeffrey pine beetle, Dendroctonus jeffreyi Hopkins, was assessed using allozymes. Of 21 loci assayed, 6 were polymorphic in at least one population. Average heterozygosity across all populations and loci was 4%. Genetic distance among the populations ranged from 0.001 to 0.060. The two most southern populations were the most differentiated. At two loci, alleles were present in the southern populations that were not present in any northern populations. The southern populations were also lacking an allele at one locus that was present in all northern populations. Geographic isolation is apparently responsible for allowing the divergence of the southern populations. A dendrogram estimating the relationships among the 10 populations was developed using restricted maximum likelihood. Evidence of inbreeding was found, which in these beetles may be closely tied to population size and dispersal behavior.

Two Women atop Jeffrey Pine on Sentinel Dome

2014 ◽  
Vol 91 (3) ◽  
pp. 67-68
Author(s):  
Shelly Kale
Keyword(s):  
Jeffrey Pine

scholarly journals Endemic Jeffrey Pine Beetle Associates: Beetle/Mite Fungal Dissemination Strategies and Interactions That May Influence Beetle Population Levels

2021 ◽  
Vol 9 (8) ◽  
pp. 1641
Author(s):  
Javier E. Mercado ◽  
Beatriz Ortiz-Santana ◽  
Shannon L. Kay
Keyword(s):  
Bark Beetle ◽  
Mountain Pine Beetle ◽  
Jeffrey Pine ◽  
Mutualistic Interaction ◽  
Pine Beetle ◽  
Blue Stain Fungi ◽  
Blue Stain ◽  
Grosmannia Clavigera ◽  
Mutualistic Fungus ◽  
Jeffrey Pine Beetle

Fungal and mite associates may drive changes in bark beetle populations, and mechanisms constraining beetle irruptions may be hidden in endemic populations. We characterized common fungi of endemic-level Jeffrey pine beetle (JPB) in western USA and analyzed their dissemination by JPB (maxillae and fecal pellet) and fungivorous mites to identify if endogenous regulation drove the population. We hypothesized that: (1) as in near-endemic mountain pine beetle populations, JPB’s mutualistic fungus would either be less abundant in endemic than in non-endemic populations or that another fungus may be more prevalent; (2) JPB primarily transports its mutualistic fungus, while its fungivorous mites primarily transport another fungus, and (3) based on the prevalence of yeasts in bark beetle symbioses, that a mutualistic interaction with blue-stain fungi present in that system may exist. Grosmannia clavigera was the most frequent JPB symbiont; however, the new here reported antagonist, Ophiostoma minus, was second in frequency. As hypothesized, JPB mostly carried its mutualist fungus while another fungus (i.e., antagonistic) was mainly carried by mites, but no fungal transport was obligate. Furthermore, we found a novel mutualistic interaction between the yeast Kuraishia molischiana and G. clavigera which fostered a growth advantage at temperatures associated with beetle colonization.

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