| Autor: |
Adeniji, M. O., Shoyinka, S. A., Ikotun, T., Asiedu, R., Hughes, J.d'A, Odu, B.O. |
| Jazyk: |
angličtina |
| Rok vydání: |
2016 |
| Předmět: |
|
| Zdroj: |
Ife Journal of Science; Vol 14, No 2 (2012); 237-244 |
| ISSN: |
0794-4896 |
| Popis: |
An experiment was conducted to investigate the influence of Yam mosaic virus (YMV) genus Potyvirus on the tuber yield of Dioscorea rotundata based on assessment of comparative performance of inoculated and uninoculated plants of two genotypes (TDr 93-31 and TDr 95-127). Symptoms of virus infection were evident on inoculated plants especially at four weeks after inoculation. Visual virus symptom severity scores had significant (P 0.004), harvest index (P < 0.01), leaf chlorophyll content, and intercepted photosynthetically active radiation (P = 0.01) were obtained from plots with inoculated plants. YMV infection in D. rotundata resulted in a yield loss of 65.4% in TDr 93-31 and 52.6% in TDr 95-127. Reduced capacity for photosynthesis in YMV infected plants, due to increased diffusive resistance of stomata, as well as reduced leaf area and chlorophyll content, contributed significantly (P < 0.001) to their reduced tuber yields. The economic importance of the virus is thus established as it can result in significant loss to resource-poor farmers.Keywords: Dioscorea rotundata, TAS-ELISA, yield loss, Yam mosaic virus (YMV) genus Potyvirus. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
