scholarly journals Standing geographic variation in eclosion time and the genomics of host race formation in Rhagoletis pomonella fruit flies

2018 ◽  
Author(s):  
Meredith M. Doellman ◽  
Scott P. Egan ◽  
Gregory J. Ragland ◽  
Peter J. Meyers ◽  
Glen R. Hood ◽  
...  
Keyword(s):  
Geographic Variation ◽  
Fruit Flies ◽  
Rhagoletis Pomonella ◽  
Host Race ◽  
Host Race Formation ◽  
Race Formation

Intra- and interspecific competition and host race formation in the apple maggot fly, Rhagoletis pomonella (Diptera: Tephritidae)

Oecologia ◽  
1995 ◽  
Vol 101 (4) ◽  
pp. 416-425 ◽  
Author(s):  
Jeffrey L. Feder ◽  
Katherine Reynolds ◽  
Wesley Go ◽  
Emma C. Wang
Keyword(s):  
Interspecific Competition ◽  
Rhagoletis Pomonella ◽  
Host Race ◽  
Apple Maggot Fly ◽  
Host Race Formation ◽  
Race Formation

Evidence for Inversion Polymorphism Related to Sympatric Host Race Formation in the Apple Maggot Fly, Rhagoletis pomonella

Genetics ◽  
2003 ◽  
Vol 163 (3) ◽  
pp. 939-953 ◽  
Author(s):  
Jeffrey L Feder ◽  
Joseph B Roethele ◽  
Kenneth Filchak ◽  
Julie Niedbalski ◽  
Jeanne Romero-Severson
Keyword(s):  
Sympatric Speciation ◽  
Inversion Polymorphism ◽  
Rhagoletis Pomonella ◽  
Single Pair ◽  
Host Race ◽  
New Host ◽  
Host Race Formation ◽  
Allozyme Loci ◽  
Genomic Regions ◽  
Race Formation

Abstract Evidence suggests that the apple maggot, Rhagoletis pomonella (Diptera: Tephritidae) is undergoing sympatric speciation (i.e., divergence without geographic isolation) in the process of shifting and adapting to a new host plant. Prior to the introduction of cultivated apples (Malus pumila) in North America, R. pomonella infested the fruit of native hawthorns (Crataegus spp.). However, sometime in the mid-1800s the fly formed a sympatric race on apple. The recently derived apple-infesting race shows consistent allele frequency differences from the hawthorn host race for six allozyme loci mapping to three different chromosomes. Alleles at all six of these allozymes correlate with the timing of adult eclosion, an event dependent on the duration of the overwintering pupal diapause. This timing difference differentially adapts the univoltine fly races to an ∼3- to 4-week difference in the peak fruiting times of apple and hawthorn trees, partially reproductively isolating the host races. Here, we report finding substantial gametic disequilibrium among allozyme and complementary DNA (cDNA) markers encompassing the three chromosomal regions differentiating apple and hawthorn flies. The regions of disequilibrium extend well beyond the previously characterized six allozyme loci, covering substantial portions of chromosomes 1, 2, and 3 (haploid n = 6 in R. pomonella). Moreover, significant recombination heterogeneity and variation in gene order were observed among single-pair crosses for each of the three genomic regions, implying the existence of inversion polymorphism. We therefore have evidence that genes affecting diapause traits involved in host race formation reside within large complexes of rearranged genes. We explore whether these genomic regions (inversions) constitute coadapted gene complexes and discuss the implications of our findings for sympatric speciation in Rhagoletis.

The genetic structure of hawthorn-infesting Rhagoletis pomonella populations in Mexico: implications for sympatric host race formation

2007 ◽  
Vol 16 (14) ◽  
pp. 2867-2878 ◽  
Author(s):  
ANDREW P. MICHEL ◽  
JUAN RULL ◽  
MARTIN ALUJA ◽  
JEFFREY L. FEDER
Keyword(s):  
Genetic Structure ◽  
Rhagoletis Pomonella ◽  
Host Race ◽  
Host Race Formation ◽  
Race Formation

scholarly journals Environmental interactions during host race formation: host fruit environment moderates a seasonal shift in phenology in host races of Rhagoletis pomonella

2012 ◽  
Vol 26 (4) ◽  
pp. 921-931 ◽  
Author(s):  
Gregory J. Ragland ◽  
Sheina B. Sim ◽  
Serra Goudarzi ◽  
Jeffrey L. Feder ◽  
Daniel A. Hahn
Keyword(s):  
Rhagoletis Pomonella ◽  
Host Race ◽  
Host Races ◽  
Host Fruit ◽  
Host Race Formation ◽  
Seasonal Shift ◽  
Environmental Interactions ◽  
Race Formation

Host race formation in the meadowsweet and strawberry feeding leaf beetle Galerucella tenella

2008 ◽  
Vol 9 (5) ◽  
pp. 560-567 ◽  
Author(s):  
Johan A. Stenberg ◽  
E. Petter Axelsson
Keyword(s):  
Leaf Beetle ◽  
Host Race ◽  
Host Race Formation ◽  
Race Formation
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