Phylogeographic pattern and regional evolutionary history of the maize stalk borer<i>Busseola fusca</i>(Fuller) (Lepidoptera: Noctuidae) in sub-Saharan Africa

Sezonlin, Michel; Dupas, Stéphane; Rü, Bruno Le; Faure, N.; Gall, Philippe; Silvain, Jean‐François

doi:10.1080/00379271.2006.10697466

Cited by 14 publications

(19 citation statements)

References 49 publications

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“…These differences suggest that stem borer pests are often composed of several ecologically, and probably also genetically, differentiated populations. For B. fusca , a genetic differentiation in three clades of haplotypes (W, KI, KII) has been demonstrated recently through phylogeographical analyses of sub‐Saharan Africa populations using mitochondrial markers (Sezonlin et al., ,b). Clade W, only observed in West Africa, is highly homogeneous, whereas clade KII, with a large geographical distribution from East to South via Central Africa, is partially sympatric with KI, which is geographically limited to a particular area of East Africa.…”

Section: Introductionmentioning

confidence: 95%

Genetic structure and origin of Busseola fusca populations in Cameroon

Sezonlin

Ndemah

Goergen

et al. 2012

Entomologia Exp Applicata

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The cereal stem borer Busseola fusca Fuller (Lepidoptera: Noctuidae) is a species endemic to sub‐Saharan Africa. It is a major pest of maize and cultivated sorghum, the main cereal crops on the African mainland. Previous studies using mitochondrial markers revealed the presence of three clades of haplotypes (W, KI, KII) among B. fusca populations. Previous preliminary studies based on a few B. fusca individuals collected from three localities within the Guineo‐Congolian rain forest in Cameroon demonstrated a matching with clade KII, a fairly surprising result because the putative centre of origin of that clade is located 3 000 km away in East Africa. To check this finding, 120 individuals of B. fusca covering several Cameroonian sites belonging to both Guineo‐Congolian rain forest and Afromontane vegetation mosaics were collected. Comparison of cytochrome b sequences using the same marker revealed low mitochondrial diversity (h = 0.483 ± 0.054, π = 0.073 ± 0.061%). Moreover, molecular diversity in the Guineo‐Congolian rain forest zone was lower than that in Afromontane vegetation, which is therefore thought to be the likely starting point for the colonization of other zones in Cameroon. The study showed a moderate but significant structuring between populations (ΦST = 0.034, P<0.001) as well as within and among the two Cameroonian phytogeographical groups considered (ΦSC = 0.000 and ΦCT = 0.051, respectively, both P<0.001). Nested clade phylogeographic analysis indicated that all Cameroonian clades with significant geographical associations were interpreted as a phenomenon of contiguous range expansion. All results suggest that the Cameroonian population of B. fusca is relatively recent and originates from the recent geographical expansion of clade KII.

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Section: Introductionmentioning

confidence: 95%

Genetic structure and origin of Busseola fusca populations in Cameroon

Sezonlin

Ndemah

Goergen

et al. 2012

Entomologia Exp Applicata

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“…These differences in parasitism may have been driven by local adaptation. Because the KI mitotype is mostly distributed in the region of Kitale, the Kitale parasitoid strain is more likely to parasitize KI than KII host mitotype (Sezonlin et al. 2006a,b).…”

Section: Discussionmentioning

confidence: 99%

“…The two B. fusca mitotypes have likely diverged when they became geographically separated (Sezonlin et al. 2006a,b).…”

Section: Discussionmentioning

confidence: 99%

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Variability in the reproductive biology and in resistance against Cotesia sesamiae among two Busseola fusca populations

Calatayud

Gitau

Calatayud

et al. 2010

Journal of Applied Entomology

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Two mitotypes of Busseola fusca (Fuller) (Lepidoptera: Noctuidae) named KI and KII, co‐exist in Kenya. Individuals of KII are more widely distributed than those of KI. The present study assessed whether this was due to differences in their reproductive potential and/or in their resistance to the braconid Cotesia sesamiae Cameron, which is the most common larval parasitoid of B. fusca in the region. Two populations of the parasitoid, one from the coastal and one from the inland regions of Kenya, which differ in their ability to develop in B. fusca, were tested. Virgin KII females started to call sooner during the night than KI females. Female fecundity and egg viability were significantly lower for the heterogamous than the homogamous crosses. Cotesia sesamiae from the inland produced larger progeny in KI than in KII host. Cotesia sesamiae from the coast did not develop in either host. Despite their long time co‐existence in the same geographical area, KII and KI conserved biological differences in terms of time of calling, fecundity, fertility and resistance against the larval parasitoid, C. sesamiae. This might explain the wider distribution of KII as compared to KI in Kenya.

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“…Des études phylogéographiques ont mis en évidence une variabilité génétique des populations de certaines espèces de foreur comme Eldana saccharina Walker 1865 (Lepidoptera : Pyralidae), un important ravageur de la canne à sucre en Afrique du Sud, et B. fusca en fonction de leur origine géographique (Assefa et al 2006 ;Sezonlin et al 2006). Ces travaux permettent de retracer l'histoire de la distribution géographique et écologique des populations de ces espèces au cours du temps sur le continent Africain.…”

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Les recherches sur les lépidoptères foreurs des graminées et leurs antagonistes : bilan et perspectives

Calatayud

Rü

Schulthess

et al. 2006

Annales de la Société entomologique de France (N.S.)

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Abtract. Research on the lepidopteran graminaceous stem borers and their antagonists : achievement and perspectives. In sub-Saharan Africa, lepidopteran stem borers cause severe damage and yield loss to graminaceous crops such as maize, sorghum and sugarcane. This paper reports major fi ndings on systematics, populations genetics and stem borer ecology by scientists from France, Australia and several African countries, over the last fi ve years. Some of these fi ndings do not agree with past results, which will affect our approach to control stem borers. These articles will be an important source of information for decision makers, scientists and extension agents working on stem borers. Résumé.Les Lépidoptères foreurs des tiges constituent un des principaux facteurs de réduction de la production de graminées cultivées (maïs, sorgho et canne à sucre) en Afrique sub-saharienne. Une synthèse des recherches menées au cours des cinq dernières années sur ces insectes ravageurs et leurs antagonistes est présentée. Les travaux réalisés dans ce domaine par des équipes françaises, australiennes et de plusieurs pays d'Afrique ont conduit à un ensemble de résultats originaux dans les domaines de la systématique, de la génétique des populations et de l'écologie des foreurs. Ces résultats bouleversent signifi cativement les connaissances acquises antérieurement, et par là même devraient conduire dans les prochaines années à un changement des méthodes de gestion de ces ravageurs. Les travaux faisant l'objet de la présente synthèse apportent aux chercheurs, décideurs et acteurs de terrain une information actualisée sur les foreurs des graminées, information diffi cilement accessible par ailleurs.L 'homme agit de façon croissante sur l'environnement et les systèmes écologiques. En retour, ces systèmes vont répondre via des mécanismes propres et interférer avec les activités humaines. Il est donc essentiel de comprendre ces mécanismes.Plus de la moitié des êtres vivants dans le monde sont des insectes et environ la moitié d'entre eux a un régime phytophage, c'est-à-dire qu'ils consomment diff érentes parties des plantes, feuilles, tiges, racines, fl eurs, fruits ou graines. La phytophagie est répandue dans les principaux ordres d'insectes, mais, parmi les ordres les plus riches en espèces, les lépidoptères comprennent une très forte proportion d'espèces phytophages. Cette phytophagie s'exerce principalement aux dépens des plantes à fl eurs, les Angiospermes. Les lépidoptères constituent donc un élément clef des biocénoses et il n'est pas étonnant qu'ils interfèrent fréquemment avec l'homme en tant que ravageurs, en particulier dans les régions tropicales où se concentre une forte proportion de la diversité entomologique. En Afrique, par exemple, l'homme a introduit des plantes cultivées qui n'en étaient pas originaires (arachide, manioc, maïs, etc.), ou a domestiqué des espèces végétales locales pour créer une variété ou une espèce cultivée dont il a intensifi é la culture (e.g. Sorghum bicolor). Dans certains cas des insectes ont...

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Phylogeographic pattern and regional evolutionary history of the maize stalk borerBusseola fusca(Fuller) (Lepidoptera: Noctuidae) in sub-Saharan Africa

Cited by 14 publications

References 49 publications

Genetic structure and origin of Busseola fusca populations in Cameroon

Genetic structure and origin of Busseola fusca populations in Cameroon

Variability in the reproductive biology and in resistance against Cotesia sesamiae among two Busseola fusca populations

Les recherches sur les lépidoptères foreurs des graminées et leurs antagonistes : bilan et perspectives

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