Author(s):

Kumari Bandana, Kumar Vinod, Raina Ravinder, Sharma Yashpal and Jadhav Rani

Abstract: Swertia chirayita is a critically endangered, highly valuable herb of temperate Himalayas which belongs to family Gentianaceae and occurs at an altitude of 1200-3000 m in India. The present studies focused on the impact of the gamma doses tested (2-30 kr at a dose interval of 2kr) on the growth performance of main shoot and beyond upto complete senescence. Some of the gamma ray doses had a promotory effect on plant height, no. of leaves per plant, leaf length, leaf width and no. of costae per lamina in comparison to control. Most of the M₁ plants died before reaching reproductive phase.Of the M₁ plants that did produce flowers (G₁, G₃, G₆, G₇, G₉, G₁₁ and G₁₃), only G₇ and G₁₁ produced viable seeds (48-72% germination). Light brown seed (48.33% germination) were observed in one plant impacted by 14 kr dose in addition to normal dark brown seed (70 to 71.67% germination).

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