EFFECT OF PHYSIOLOGICAL MATURITY ON SEED QUALITY OF
MAIZE (ZEA MAYS L.)
ABHINAV DAYAL , N. R. RANGARE, ARUN KUMAR AND MALA KUMARI
Department of Genetics & Plant Breeding,
SHIATS, Allahabad, India
(Received: 29 May 2014; Accepted: 2 June 2014)
Considering the lack of information about the time of physiological maturity of maize seeds and its effect on seed quality, this work was aimed to evaluate physiological maturity effect on see quality of maize Seeds of different varieties were harvested at 25, 35, 45 and 55 DAS (Days after silking) at four different stages. Subsequently, the quality of seed samples was determined in the laboratory. It was analysed that seed harvested at 45 DAS showed maximum seed quality in terms of enhanced seed weight, seed germination, seedling length, seedling dry weight and seedling vigor index and minimum electrical conductivity of seed leachates was found at 45 days after silking. HQPM1 variety showed maximum seed weight (30.27 gm) among 13 varieties. BIO 9681 variety showed maximum seed quality parameters viz., seed germination (96.00 %), seedling length (35.51 cm) and seedling vigour index (3760). JH3459 recorded highest seedling dry weight (1.60 mg) and minimum electrical conductivity was observed in PMH1 (0.026). Differences in maximum seedling dry weight of maize cultivars were attributed to variation in genetic constitution. It was concluded that in maize cultivars, maximum seed quality could beachieved at physiological maturity which was found at 45 Days after silking.
Keywords : Maize, physiological maturity, germination, seed quality, seed development