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- Title
EXPLORATION OF DURABLE RESISTANCE IN MUNGBEAN AGAINST MUNGBEAN YELLOW MOSAIC DISEASE.
- Authors
Akbar, Waseem; Aslam, Muhammad; Atif, Rana Muhammad; Nawaz-ul-Rehman, M. Shah
- Abstract
Mungbean yellow mosaic disease is most damaging disease of mungbean in all of its growing areas. Genetic resistance is a viable and environment friendly solution, for which resistance source is prerequisite. Total 83 mungbean genotypes were experimented for their resistance potential against disease for two consecutive years 2014 and 2015 during summer season. Infection percentage and disease severity based scoring scales were compared for their discrimination potential for screening. Disease severity based scoring scale was found superior to infection percentage based scale because it categorized genotypes into five groups while only two groups were generated by later. Infection %age ranged from 33.33 to 100% while disease severity index varied from 10 to 75%. Only one genotype (NM 6-68-2) was found comparatively tolerant (D.I. 10%) during both the years. Biplot analysis depicted that behavior of some genotypes showed instability in the second year while most of the genotypes showed a stable resistance/susceptibility levels during both the years. Accession NM 1-32-1 was highly susceptible genotype during both the years. Disease severity showed maximum correlation with chlorophyll-a reduction followed by 100 seed weight while it had high level of association with yield. Analytical dissection of correlation among traits revealed that direct effect of disease on yield reduction was negligible but it caused yield reduction via reduced harvest index and 100 seed weight. It is concluded that resistance sources are very scarce and resistance level is very low but still these sources can be exploited in breeding programs. For the improvement of genetic variability induced mutation could be another option.
- Subjects
BEAN yellow mosaic virus; MUNG bean; GENOTYPES; PLANT mutation; CHLOROPHYLL; DISEASES
- Publication
Pakistan Journal of Agricultural Sciences, 2017, Vol 54, Issue 2, p415
- ISSN
0552-9034
- Publication type
Article
- DOI
10.21162/PAKJAS/17.5399