Greengram (Vigna radiata L.) also known as mungbean belongs to the family Fabaceae. It is a short duration protein-rich grain legume crop grown in 23 countries of the world. It is mainly grown as a rainfed crop and suitable for a wide range of soil types. Apart from being an important source of animal feed and human food, greengram having an important role in sustaining soil fertility by atmospheric nitrogen fixation. Maize (Zea mays L.), a C4 cereal crop belongs to the family graminae. Across the globe today, maize is a staple food for millions of individuals, and it is also an essential component of global food security (Campos et al. 2004). Vivipary (live birth) in flowering plants can be defined as continual and precocious growth of offspring, when it is still attached to the parental parent (Goebel 1905), as this phenomenon is characterized by absence of seed dormancy (Baskin and Baskin 2001, Farnsworth 2004, Batygina and Bragina 2009). The term vivipary should be confined to the germination of seeds in situ without undergoing metabolic quiescence or resting period (Goebel 1905, Arber 1965, Font Quer 1993) and the germinated young seedling grows to a certain considerable length before detaching from the plant. Vivipary implies that seed formation and growth of sexually developed embryos are essential to the process (Farnsworth 2000) and this condition is better known in placental mammals, but it also occurs in several amphibians, insects, numerous reptiles, a few fish, and some plants (Cota-Sanchez et al. 2007). Vivipary has been reported in around 100 flowering plant families, which represents less than 0.1 of angiosperms (Farnsworth 2000).
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