Int.J.Curr.Microbiol.App.Sci (2018) 7(12): 2426-2437 2426 Original Research Article https://doi.org/10.20546/ijcmas.2018.712.276 Seed Quality Attributes under Different Temperature Regimes Experienced by Parent Plants in Wheat (Triticum aestivum L.) Archana Sanyal* and Monika A. Joshi Division of Seed Science and Technology, IACR- Indian Agricultural Research Institute, New Delhi-110012, India *Corresponding author ABSTRACT Introduction Seeds are the foundation of agriculture and key component of various cropping system to ensure optimum plant population. Technology has modernized much of farming's day-to-day operations, but without a high-quality seed, yields and crop quality would be decrease greatly. Quality seed increased crop yield by 20 to 25 % with the optimum agronomic practices. The ability of the seed to germinate, emerge into a uniform and vigorous field stand is a direct function of its quality (Grass et al., 1994 and Hasan et al., 2013). There is sufficient evidence that the parental growth environment influenced the quality of the seed produced. Variation in Seed quality, attributed to differences in environmental conditions prevailing during the formation, development, and maturation of the seed while still on the mother plant (Datta et al., 1972; Peacock and Hawkins 1970). Common wheat (Triticum aestivum L.) belongs to family Poaceae and it is the most important staple food crop in the world and second important crop in India after rice. However, almost 60% of country’s net cultivated area is rain fed and exposed to several abiotic and biotic stresses including heat stress. In India, delay in wheat sowing due to rice-wheat cropping system is one of International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 7 Number 12 (2018) Journal homepage: http://www.ijcmas.com The study was conducted to examine the effect of high temperature on seed quality attributes viz., physical, physiological and biochemical in wheat. Twelve diverse genotype’s seed obtained from normal and high temperature growing conditions were tested for quality. High parent plant growth temperature during seed development and maturation resulted in poor seed quality. The effect of parent plant growth temperature on seed germination and emergence was inconsistent among wheat genotypes. Seed vigor as indicated by seed density, conductivity of seed leachates, seedling dry weight and production of normal seedlings, were reduced in all wheat genotypes due to higher parent plant growth temperature but heat-sensitive wheat genotypes were affected more than the heat-tolerant genotypes. Further, total hydrogen peroxide activity was increased and total antioxidant capacity decreased in genotypes obtained from high growth temperature. Keywords Growth temperature, Seed quality, Wheat genotypes Accepted: 17 November 2018 Available Online: 10 December 2018 Article Info