Vol. 10, Special Issue 12 (2021)

Author(s):
Yosung Lenmem and Devadas VS

Abstract:
Response of five rice varieties viz. Sali, Thailand Lahi, MTU – 7029, MTU – 1010 and Khamti Lahi to accelerated ageing of seeds was studied involving two temperatures and two duration’s i.e 45 ⁰C and 60 ⁰C for 24 hrs and 36 hrs along with an untreated control during April 2019 at Arunachal University of Studies, Namsai. Various seed quality parameters such as germination percentage, speed of germination, vigour index, seedling dry weight and seedling length were observed. The study concluded that artificial ageing treatments involving a temperature of 45 ⁰C was found to have a significant positive effect on the seed germination and vigour parameters, while temperature of 60 ⁰C adversely affected the germination and seed quality parameters. With increase in duration of artificial ageing the seed quality parameters were found deteriorated. Among the five varieties tested, Thailand Lahi was found as the most superior variety and was highly tolerant to accelerated ageing treatments followed by MTU – 1010 and Sali which were at par with each other. Khamti Lahi was found to have the lowest germination and vigour parameters indicating its high sensitivity and low tolerance to accelerated ageing. The study indicates superiority of Thailand Lahi, MTU – 1010 and Sali for better storage life of seeds, having comparatively a slow ageing process.