Descubre y comparte nuestro conocimiento público

Se han encontrado 9 recursos

Resultados de búsqueda

Thottappilly, G.Ng, N.Q.Rossel, H.W.[Screening germplasm of Vigna vexillata for resistance to cowpea mottle virus]Screening germplasm of Vigna vexillata for resistance to cowpea mottle virus

Deux virus du niébé (Vigna unguiculata), le virus de la marbrure du niébé et le virus de la mosaïque jaune du niébé, ont été étudiés. Les deux virus ont été identifiés et caractérisés à l'aide de la gamme de plantes indicatrices et de méthodes sérologiques. Les deux virus sont très répandus dans ...


Gumedzoe, M.Y.Sunu, D.Y.Thottappilly, G.Asselin, A.[Importance du virus de la marbure du niebe et du virus de la mosaique jaune du niebe au Togo]Importance du virus de la marbure du niebe et du virus de la mosaique jaune du niebe au Togo

Vigna vexillata is a wild cross-incompatible relative of cowpea. It is highly resistant to several diseases and pests plaguing cowpea. A linkage map was developed for V. vexillata comprising 120 markers, including 70 random amplified polymorphic DNAs, 47 amplified fragment length polymorphisms, o...


Ogundiwin, E.Thottappilly, G.Akenova, M.E.Pillay, M.Fatokun, C.A.[A genetic linkage map of Vigna vexillata]A genetic linkage map of Vigna vexillata

Enzyme-linked immunosorbent assay (ELISA) was used to detectviruses in649 cowpea leafsamples collectedfrom115 fields during a 3-year survey carried out from 1991 to 1993 throughout all agroecological zones in Nigeria. Six viruses, cowpea aphid-borne mosaic potyvirus (CAMV), blackeye cowpea mosaic...


Shoyinka, S.A.Thottappilly, G.Adebayo, G.G.Anno-Nyako, F.O.[Survey on cowpea virus incidence and distribution in Nigeria]Survey on cowpea virus incidence and distribution in Nigeria

Factors responsible for successful rescue of immature embryos of cowpea [Vigna unguiculata (L.) Walp.] and V. vexillata (L.) and for in vitro embryo development were studied. A new basal medium for embryo development in vitro was formulated on the basis of the mineral composition of embryos. Sucr...


Pellegrineschi, A.Fatokun, C.A.Thottappilly, G.Adepoju, A.A.[Cowpea embryo rescue: influence of culture media composition on plant recovery from isolated immature embryos]Cowpea embryo rescue: influence of culture media composition on plant recovery from isolated immature embryos

Cowpea (Vigna unguiculata L. Walp) is one of the major grain legumes in tropical Africa. This leguminous plant is susceptible to many diseases including those caused by viruses. This article reports results from surveys conducted from the main cowpea producing areas in Togo for the occurrence of ...


Gumedzoe, M.Y.D.Thottappilly, G.Asselin, A.[Occurence of Southern bean mosaic virus (SBMV) in Togo and its interaction with some cowpea cultivars]Occurence of Southern bean mosaic virus (SBMV) in Togo and its interaction with some cowpea cultivars

The feeding activity of Aphis craccivora (Koch) was monitored on cowpea plants of aphid‐susceptible (Vita 7) and aphid‐resistant (TVu 801) cultivars, using an AC electronic feeding monitoring system. Waveforms corresponding to salivation, phloem ingestion and non‐phloem ingestion were observed. A...


Mesfin, T.Thottappilly, G.Singh, S.R.[Feeding behaviour of Aphids craccivora (Koch) on cowpea cultivars with different levels of aphid resistance]Feeding behaviour of Aphids craccivora (Koch) on cowpea cultivars with different levels of aphid resistance

Virus diseases cause substantial yield reduction in cowpea ( Vigna unguiculata (L.) Walp) production in West and Central Africa. Improved cowpea cultivars have been developed and distributed to various national programs but these cultivars were tested only against local virus isolates. To identif...


Boxtel, J. vanSingh, B.Thottappilly, G.Maule, A.[Resistance of cowpea (Vigna unguiculata (L.) Walp.) breeding lines to blackeye cowpea mosaic and cowpea aphid borne mosaic potyvirus isolates under experimental conditions]Resistance of cowpea (Vigna unguiculata (L.) Walp.) breeding lines to blackeye cowpea mosaic and cowpea aphid borne mosaic potyvirus isolates under experimental conditions

The effect of mixed infection of cowpea aphid-borne mosaic (CAMV) and cucumber mosaic (CMV) viruses on cowpea yield varied with the resistance levels of cowpea lines, since there was a strong interaction between the latter and virus infection types atP ≤ 0.01. In cowpea line TVu 3629, with low re...


Mih, A.M.Atiri, G.I.Thottappilly, G.[Relationships between coinfection with cowpea aphidborn mosaic and cucumber mosaic viruses and yield of cowpea lines with varying resistance to these viruses]Relationships between coinfection with cowpea aphidborn mosaic and cucumber mosaic viruses and yield of cowpea lines with varying resistance to these viruses

Selecciona los documentos para visualizarlos

Nombre del archivo Ver recurso