IMPACT OF ACCELERATED AGEING ON THE SEED QUALITY AND YIELD CONTRIBUTING CHARACTERS IN WHEAT (Triticum aestivum L.) VARIETIES.
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Date
2016-06
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College of Forestry, Ranichauri Campus. V. C. S. G. Uttarakhand University of Horticulture and Forestry.
Abstract
Availability of good quality seed at the time of planting is most important factor for successful production of any crop because good quality seed not only ensure proper emergence but rapid establishment of seedling in the field that enhance the seed yield. There are various factors such as temperature and moisture content which affect the quality of seed. Most of the people, use the stored seed for sowing purpose that resulting poor yield due to physiological and biochemical changes during ageing.
Deterioration of seed quality during ageing is a natural phenomenon. This is caused by alterations in various physiological viz. seed germination, seedling length, seed vigour and biochemical parameters such as seed leachate, seed viability and dehydrogenase activity. Changes in these parameters adversely affect seed yield and related characters.
The present investigation on “Impactcceleratedofageing on the seed quality and yield contributing characters in wheat (Triticum aestivum L.) varieties” was conductedSeedTesting at Laboratory and Research Block of Seed Science and Technology, VCSG UUHF, College of Forestry, Ranichauri, Tehri Garhwal, Uttarakhand during 2014-15. For this purpose four varieties of wheat viz. VL-802, VL-829, VL-892 and UP-1109 were subjected to accelerated ageing at 450 C and 100 % relative humidity for 15, 30 and 45 days along with control. The experiment was laid out in factorial RBD and CRD with three replication of each treatment.
Aged seed from different treatments of each variety were subjected to field experiment for evaluating plant growth, seed yield and its contributing characters. Results showed decline in all yield contributing characters and quality parameters with increase in ageing period. Rapid decline in seed yield contributing characters ware observed in VL-802 whereas, less reduction observed in VL-892.
Under the laboratory conditions, every treatment showed significantly difference for seed quality parameters after accelerated ageing. Variety VL-892 had more capable to maintain the seed quality attributes after 15, 30 and 45 days of accelerated ageing period as considered being good storer under ambient condition. Whereas, VL-829 and UP-1109 showed the medium storer and VL-802 poor storer variety on the basis of seed quality and yield parameters.
It is concluding that deterioration occur during different time of ageing period in wheat varieties. It is suggested that breeder and farmer can use wheat seed that was stored under ambient conditions for cultivation upto three and four year.