Genetic analysis of resistance to mungbean yellow mosaic virus in mungbean (Vigna radiata)

Abstract

With 1 figure and 3 tables Abstract Mungbean yellow mosaic virus (MYMV) causes one of the most destructive diseases in mungbean. The objectives of this study were to determine the inheritance of MYMV resistance and to identify the role of each resistance gene. Six crosses between resistant and susceptible genotypes were attempted. An infector row technique was used for evaluating parents, F1 and F2 plants for MYMV resistance. Segregating populations were classified into four reactions viz. susceptible (S), moderately susceptible (MS), moderately resistant (MR) and highly resistant (R) based on the distribution and severity of symptoms. The F1 plants from all six crosses and the susceptible parents showed S reactions, while resistant parents showed R reactions. The segregation of resistance responses in F2 populations in ratios of 9 S : 3 MS : 3 MR : 1 R suggested that the resistance was governed by two recessive genes. When one gene was present in the homozygous recessive condition in different plants, it conferred MR and MS reactions. When both genes were present together in the homozygous recessive condition, plants produced resistant reactions (R).

Breeding for Enhancing Legumovirus Resistance in Mungbean: Current Understanding and Future Directions

“…Likewise, the single monogenic inheritance of MYMV-resistance has also been reported by Singh and Patel [101], Sandhu et al [120], Malik et al [102,121], Malik [122], Saleem et al [103], and Khattak et al [16]. The involvement of two recessive genes in MYMV-resistance in mungbean has also been reported [123,124]. A recent report by Sai et al [51] indicated the monogenic inheritance pattern of MYMV-resistance in mungbean.…”

Introgression of productivity and other desirable traits from ricebean (Vigna umbellata) into black gram (Vigna mungo)

“…These novel gene(s) introgressed from ricebean for resistance to MYMV, CLS and BLS may provide durable resistance in both black gram and green gram. The process of introgression of desirable traits from related species to cultivated ones can further be accelerated using molecular marker-assisted breeding procedures (Kumar et al 2011, Dhole andReddy 2012). The advanced interspecific derivatives possessing high degree of resistance to MYMV, CLS and BLS can be screened extensively using molecular markers to identify derivatives having minimum ricebean segments for use in breeding programmes to minimize the noise of undesirable traits.…”

Epistatic Basis of Mosaic Resistance in Mungbean [Vigna radiata (L.) Wilczek]

“…Evaluation was carried out during summer seasons as severe MYMV infection is observed during this season at Navsari. The observed and expected numbers of individuals along with chi-square test are presented in Malik et al, (1986Malik et al, ( & 1988, Thakur et al, (1997), Pal et al, (1991), Reddy and Singh (1995) or two recessive genes (Dhole and Reddy, 2012) or complementary recessive genes (Shukla and Pandya, 1985). Surprisingly, in our study, digenic duplicate epistasis was observed where two dominant genes together or alone are responsible for mosaic resistance.…”