Inheritance of Resistance to Mungbean Yellow Mosaic Virus (MYMV) in Inter and Intra Specific Crosses of Mungbean (<i>Vigna radiata</i>)
- 1 Department of Plant Molecular Biology & Biotechnology, Centre for Plant Molecular Biology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India;
- 2 Department of Plant Molecular Biology & Biotechnology, Centre for Plant Molecular Biology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India;
- 3 Department of Plant Molecular Biology & Biotechnology, Centre for Plant Molecular Biology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India;
- 4 Department of Plant Molecular Biology & Biotechnology, Centre for Plant Molecular Biology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India;
- 5 National Pulse Research Centre, Tamil Nadu Agricultural University, Vamban, Tamil Nadu, India.
- 6 Department of Plant Molecular Biology & Biotechnology, Centre for Plant Molecular Biology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India;
- 7 Department of Plant Molecular Biology & Biotechnology, Centre for Plant Molecular Biology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India;
- 8 Department of Plant Molecular Biology & Biotechnology, Centre for Plant Molecular Biology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India;
- 9 Department of Plant Molecular Biology & Biotechnology, Centre for Plant Molecular Biology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India;
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, o nly after 80% of plants showed MYMV incidence, and the scoring of the test materials was done by MYMV disease rating scale. Ac cording 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 resis tance and the results of the F 3 segregation (1:2:1) confirm the segregation patte r n 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 .
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