Screening Cowpea (&lt;I&gt;Vigna unguiculata&lt;/I&gt; (l) walp) lines for infection responses to some Cowpea Viruses in Nigeria

Ittah, Macauley Asim

doi:10.4314/gjpas.v10i4.16425

Cited by 1 publication

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“…This study has compared the responses of cowpea cultivars to very destructive pathogens of the plant namely; Bean common mosaic virus genus Potyvirus -blackeye cowpea strain (BCMV -BlC), Cowpea aphid-borne mosaic virus genus Potyvirus (CABMV), Cowpea mottle virus genus Carmovirus (CMeV) and Southern bean mosaic virus genus Sobemovirus (SBMV). The symptoms expressed by the lines were similar to those reported by Ittah (2004); both the severity and incidences of infection were low in the highly resistant and resistant genotypes, and high in the susceptible and highly susceptible lines. But the incidence of BCMV -BlC and CMeV on TVu 13686, TVu 66 and IT82D-889 lines were higher in the field than in the screenhouse probably due to the differences in ambient conditions in the two environments.…”

Section: Discussionsupporting

confidence: 79%

“…Fifteen cowpea genotypes were chosen from a screen -house study reported by Ittah (2004) and evaluated in the field for their responses to infection caused by four seed-borne viruses. Isolates of Bean common mosaic virus genus Potyvirus -blackeye cowpea strain (BCMV -BlC), Cowpea aphid-borne mosaic virus genus Potyvirus (CABMV), Cowpea mottle virus genus Carmovirus (CMeV) and Southern bean mosaic virus genus Sobemovirus (SBMV) were obtained from the Virology unit of the International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria and maintained in life plant (Ife brown) culture in an insect free screen -house in the unit.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Response of cowpea lines to inoculation with four seed transmitted viruses of cowpea.

Ittah¹,

Fawole²,

Shoyinka³

et al. 2010

Global Journal of Agricultural Sciences

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This study evaluated the performance cowpea genotypes in the field in Ibadan, Nigeria for response to infection induced by four seed transmitted viruses of cowpea. The experiment was laid out in split plot design with three replicates. Cowpea mottle virus genus Carmovirus (CMeV) produced infection in 14 of the 15 lines, Bean common mosaic virus genus Potyvirus-blackeye cowpea strain (BCMV-BlC) in 12, Cowpea aphid-borne mosaic virus genus Potyvirus (CABMV) in 11 and Southern bean mosaic virus genus Sobemovirus (SBMV) in 6. BCMV-BlC significantly reduced (p < 0.05) the grain yield, number of pods per plant, number of seeds per plant and shoot length than CMeV, and CMeV reduced the same traits than CABMV and SBMV. Percentage reduction in the grain yield induced by BCMV-BlC infection ranged from 62.6% in CP-VAR8 to 87.7% in IT86D-371, CMeV from 49.9% in IT90K-284-2 to 91.4% in IT82D-889, CABMV from 20.2% to 87% and SBMV from 31.8% to 69.2%. Similar trend was observed in the reduction of the number of pods per plant, plant height and number of seeds per pod. The four viruses did not affect the number of days from planting to 50% flowering and the number of days from planting to maturity. IT90K-284-2, IT82D-889, TVu 11426 and IT86D-880 were resistant to infection caused by BCMV-BlC, CABMV and SBMV but were tolerant to CMeV infections. CP-VAR8 was resistant to infections induced by CMeV and SBMV. The cultivation of these lines should be encouraged in the areas where the viruses are endemic.

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Section: Discussionsupporting

confidence: 79%

Section: Methodsmentioning

confidence: 99%