| Pak. J. Bot., 38(2): 449-457, 2006. | Back to Contents | ||||
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Updated: 09-07-09 | ||||
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EVALUATION OF MUNGBEAN GERMPLASM FOR RESISTANCE AGAINST MUNGBEAN YELLOW MOSAIC BEGOMOVIRUS NADEEM SHAD, S.M. MUGHAL, KHALID FAROOQ AND M. BASHIR*
Abstract: Mungbean (Vigna radiata) germplasm consisting of 254 lines was
evaluated against mungbean yellow mosaic begomovirus (MYMV) under natural
field conditions conducive for the development of disease and whitefly
virus vector population. Majority of the lines were infected within
2-3 weeks and the disease increments monitored over a period of six
weeks were 2.36, 18, 48, 74, 83 and 95%. Disease severity followed the
similar trend i.e., 0.48, 1.85, 3.82, 4.74, 4.94 and 4.99, respectively.
Whitefly population ranged between 1.5-8 adults/plant with an average
of 4 adults. MYMV occurred over a wide range of climatic conditions
in summer. None of the lines appeared to resistant of any category;
7 lines were classified as susceptible and 247 as highly susceptible
indicating that resistance was scarce in mungbean germplasm. Some lines
in spite of high disease pressure produced significantly good yield,
indicating tolerant reaction to MYMV and selected for breeding purposes.
Department of Plant Pathology, University of Agriculture, Faisalabad. |
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