Understanding the Genetic Architecture and Gene Actions Involved in the Inheritance of Yellow Mosaic Disease and Other Yield Related Traits in Mungbean [Vigna radiata (L.) Wilczek]

Background: Yellow mosaic disease (YMD) transmitted by white fly, Bemisia tabaci is the most persistent and devastating biotic stress worldwide in India resulting reduced productivity of mungbean. At same time yield levels mungbean reached a plateau, which emphasizes importance varieties with improved productivity. Methods: In present investigation, to address this urgent requirement YMD resistant high yielding varieties, six-parameter model generation mean analysis was employed for proper understanding genetic architecture gene actions. Susceptible genotype MGG 385 crossed four genotypes (LGG 607, LGG 630, WGG 42 PM 5) produce respective F1s (during rabi, 2018-19), BC1s, BC2s summer, 2019) F2s kharif, 2019). These generations crosses were evaluated various related traits 2019-20 phenotyped 2020 at Lam, Guntur, Andhra Pradesh hotspot YMD. Result: The scaling tests joint test indicated inadequacy Additive-dominant all including except branches per plant pods cluster. study revealed non-allelic interactions inheritance majority Among interactions, [l] type interaction predominant. Further, control duplicate epistasis evident least few (except grain plant) that had additive-dominant model, hinders pace progress through selection. presence inter-allelic such epistasis, population approach self-pollinated crops, similar recurrent selection cross pollinated crops or biparental mating followed conventional later should be adopted identifying desirable segregants.