Genetic differentiation of groundnut seed-beetle populations in Senegal

Caryedon serratus, the groundnut seed‐beetle, is a major pest of groundnut (Arachis hypogaea), an introduced legume in the subfamily Papilionoideae. Native hosts of C. serratus in Senegal include Bauhinia rufescens, Cassia sieberiana, Piliostigma reticulatum and Tamarindus indica, all of which belon...

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Bibliographic Details
Published in:Entomologia experimentalis et applicata 1998-05, Vol.87 (2), p.171-180
Main Authors: Sembene, M. (Laboratoire de Protection des Stocks ITA-ORSTOM, Dakar (Senegal).), Delobel, A
Format: Article
Language:English
Subjects:
ARACHIS HYPOGAEA
Biological and medical sciences
BIOLOGICAL DIFFERENCES
BIOTIPOS
BIOTYPE
BIOTYPES
Bruchidae
Caesalpinioideae
CARYEDON
Caryedon serratus
Coleoptera
DIFERENCIAS BIOLOGICAS
DIFFERENCE BIOLOGIQUE
Fundamental and applied biological sciences. Psychology
genetic differentiation
GENETIC VARIATION
GENETICA DE POBLACIONES
GENETIQUE DES POPULATIONS
groundnut
HOST PARASITE RELATIONS
Insecta
Invertebrates
Leguminosae
POPULATION GENETICS
RELACIONES HUESPED PARASITO
RELATION HOTE PARASITE
Senegal
Systematics. Geographical distribution
VARIACION GENETICA
VARIATION GENETIQUE
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Summary:Caryedon serratus, the groundnut seed‐beetle, is a major pest of groundnut (Arachis hypogaea), an introduced legume in the subfamily Papilionoideae. Native hosts of C. serratus in Senegal include Bauhinia rufescens, Cassia sieberiana, Piliostigma reticulatum and Tamarindus indica, all of which belong to the legume subfamily Caesalpinioideae. The biology and natural history of C. serratus suggest that it is a candidate for population differentiation via host‐race formation. Evidence for host‐tree associated differentiation in C. serratus would be important for the design of rational pest management practices. To test this possibility, we analyzed the genetic structure of 20 adult collections of C. serratus from six sites in Western Senegal, on its five hosts. Results show a strong differentiation of insects from different host trees, with specimens from C. sieberiana possibly representing a sibling species and insects from B. rufescens a distinct host‐race.
ISSN:0013-8703
1570-7458
DOI:10.1046/j.1570-7458.1998.00318.x