Author(s):

Prakash Patel, Kaushal Modha, Gopal Vadodariya and Ritesh Patel

Abstract: Mungbean Yellow Mosaic Virus (MYMV) is one of the most important diseases of Mungbean. It is transmitted through whitefly (Bemisia tabaci). The present investigation aimed to identify stable MYMV resistant lines through screening under natural condition. The experimental material consisted of two parents viz., MYMV resistant mungbean cultivar - Meha and agronomically superior but MYMV susceptible variety GM-4 as well as their 165 F₅ RILs. Screening for MYMV resistance was done by planting infector rows along with the test entries. Results revealed that most of the genotypes studied were categorized as resistant to highly susceptible. None of the test entries appeared to be immune. It was observed that the two parents Meha and GM-4 showed uniform expression of resistance and susceptibility, respectively. Infector rows of GM-4 were heavily infected, while resistant parent Meha remained uninfected till maturity. RIL population showed various reactions viz. Resistant (R), moderately resistant (MR), moderately susceptible (MS), susceptible (S) and highly susceptible (HS) based on disease score. In spite of the variable response to MYMV, out of 165 RILs, 78 RILs exhibited resistant reaction, 6 RILs moderately resistant, 7 RILs moderately susceptible, 37 RILs susceptible and 37 RILs highly susceptible. These genotypes would be utilized as donors to develop MYMV resistant lines. Heterozygous Inbred Lines may be identified from this population for molecular mapping and dissection of MYMV resistance in mungbean utilizing genomics tools.

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