Inheritance of Resistance to Mungbean Yellow Mosaic Virus (MYMV) in Inter and Intra Specific Crosses of Mungbean (<i>Vigna radiata</i>)

Abstract

The objective of this research was to study the mode of inheritance of resistance to mungbean yellow mosaic virus (MYMV) in inter TNAU RED × VRM (Gg) 1 and intra KMG 189 × VBN (Gg) 2 specific crosses of mungbean. An infector row technique was used for evaluating parents, F 1 , F 2 and F 3 plants for MYMV resistance. No insecticide was sprayed in order to maintain the natural whitefly population in experimental field. In the field condition, only after 80% of plants showed MYMV incidence, and the scoring of the test materials was done by MYMV disease rating scale. According to the mean disease score, the mungbean genotypes were categorized into five groups resistant (R), moderately resistant (MR), moderately susceptible (MS), susceptible (S) and highly susceptible (HS). 3 (Susceptible): 1 (Resistance) was observed in all two crosses of all F 2 population and it showed that the dominance of susceptibility over the resistance and the results of the F 3 segregation (1:2:1) confirm the segregation pattern of the F 2 segregation. Collectively all the two crosses F 2 and F 3 generations results suggested that a single recessive gene is involved in resistance against the MYMV disease.

Exploration of Durable Resistance in Mungbean Against Mungbean Yellow Mosaic Disease

“…This study confirmed the findings that the resistance against mungbean yellow mosaic virus is very scarce (Ahmad, 1975;Sahoo and Hota, 1991;Singh et al, 1996;Saleem et al, 1998;Bashir, 2005;Shad et al, 2006;Akhtar et al, 2011;Iqbal et al, 2011). This scarcity of resistant source is actually due to low proportion of recessive alleles (Sudha et al, 2013) in natural gene pool which also implies that recessive allele is mutated form of wild gene conferring susceptibility. Reported resistant genotype can be used as resistant source in breeding programs for the development of high yielding and mungbean yellow mosaic disease resistant varieties.…”

“…Mungbean is an important legume crop of Asia which produces almost 90% of the total global production (Sudha et al, 2013). It is a nutritive crop with high nutrient value which contains 20-24% protein and 60-65% carbohydrates.…”

“…Disease is characterized by yellow specks and spots on leaves, stunted growth, reduced flowers and shriveled seeds. Almost all available varieties are vulnerable to disease and damage may approach up to 100% yield losses in severe epidemics (Sudha et al, 2013;Mohan et al, 2014). The disease is a major threat to mungbean cultivation in different countries including India, Sri-Lanka, Pakistan, Bangladesh, Papu New Guinea, Philippines and Thailand (Honda et al, 1983;Chenulu and Verma, 1988).…”

“…In short genetic resistance against the disease is the only viable option to combat the mentioned issue. A massive research has been conducted to find out resistance source by different researchers (Singh et al, 1996;Shad et al, 2006;Habib et al, 2007;Sudha et al, 2013;Mohan et al, 2014) which identified either no resistance source (Singh et al, 1996;Shad et al, 2006;Habib et al, 2007) or relatively resistant source (Sudha et al, 2013;Mohan et al, 2014). No highly resistant mungbean variety is available in Pakistan.…”

Tropical Food Legumes

“…This technique was applied for screening of mungbean progenies (F 2 ) derived from a cross between Vamban (Gg) 2 (susceptible) Â KMG 189 (MYMV resistant) (Karthikeyan et al, 2011). Later, a similar approach was used for screening of 78 mungbean germplasm lines for resistance to MYMV (Sudha et al, 2013).…”