ABSTRACT: Seed of six varieties of wheat (Triticum aestivum) viz. C-306, PBW-502, WH-542, WH-711, WH-283 and RAJ-3765 were subjected to natural vis-à-vis accelerated ageing conditions and evaluated for relative storage potential of the seeds of respective varieties and ageing conditions. Seeds of all the varieties found 18 months of storability except the variety C-306 in term of minimum seed certification standards (MSCS) for germination percentage. Whereas variety RAJ-3765 was adjudged to have poor storability as it showed 18 months of seed storage potential under ambient conditions. After two years of storage all the wheat varieties loss their germination below minimum seed certification standards (MSCS). Maximum germination percentage retained by variety PBW-502(79.00), considered to have good storability as compared to others whereas minimum germination percentage retained by variety C-306(71.33) found to have poor storability. In case of accelerated aged seed lot maximum germination percentage retained by variety PBW-502(55.00) showed good storability whereas RAJ-3765(44.00) retained minimum germination percentage which showed poor storability among all varieties followed by C-306(47.00). Thus in both conditions natural and accelerated aged seed PBW-502 was adjudged good and RAJ-3765 was as poor storage genotypes. Secondly accelerated aged seed is having poor storability as compare to natural aged seed.
Table of Contents
1. MATERIALS AND METHODS
2. RESULTS AND DISCUSSION
Objectives and Research Themes
This research aims to evaluate and compare the storage potential of six different wheat (Triticum aestivum) varieties under both natural and accelerated ageing conditions to determine their relative storability and identify genotypic differences in seed quality maintenance.
- Comparison of seed germination and vigour index across six wheat varieties.
- Assessment of natural ageing effects on seed quality over a 24-month period.
- Evaluation of seed storage potential under accelerated ageing conditions (40±1ºC/72 hrs.).
- Identification of "good" vs. "poor" storer genotypes based on seed certification standards.
- Analysis of physiological and biochemical deterioration mechanisms in aged wheat seeds.
Excerpt from the Book
RESULTS AND DISCUSSION
Seed germinability of several species has been reported to reduce with age during storage (6, 7). In the present studies data on standard germination and seed vigour index after ambient storage (Table 1,2 ) as well as after accelerated ageing (Table 3,4 ) indicated that different wheat varieties registered differential seed storability. Seed of C-306 showed decline in per cent germination (76%) below minimum seed certification standards after 18 months of ambient storage conditions. However, PBW-502 maintained higher germination percentage (85%). In case of vigour index, maximum vigour index was retained by WH-542 (2460.40) and minimum by RAJ-3765 (2066.93). After two years of storage maximum germination percentage and vigour index was recorded in PBW-502 (79 per cent and 1072.03 respectively) and the minimum germination percentage and vigour was recorded RAJ-3765 (71.33 per cent and 891.65 respectively). One of the reasons associated with seed deterioration leading to them loss of germination and vigour is loss of membrane integrity. Accelerated ageing of various seed lots also showed the variability in storage potential of seed lots. After accelerated ageing maximum germination percentage and vigour index also retained by variety PBW-502 (55% and 742.50 respectively) and minimum germination percentage and vigour index retained by variety RAJ-3765 (44% and 524.92 respectively).
Summary of Chapters
1. MATERIALS AND METHODS: Describes the experimental setup, including the six wheat varieties, the controlled accelerated ageing process (40±1ºC/72 hrs.), and the monitoring of natural storage conditions using ISTA testing rules.
2. RESULTS AND DISCUSSION: Presents and analyzes the collected data on germination percentages and vigour indices, identifying genotype-specific differences in how wheat varieties maintain seed viability under stress.
Keywords
Accelerated ageing, natural ageing, wheat, seed quality, seed storability, germination percentage, vigour index, seed deterioration, Triticum aestivum, storage potential, genotype, membrane integrity, seed viability, ambient storage, ISTA testing.
Frequently Asked Questions
What is the primary focus of this research paper?
The paper examines the relative storage potential and seed quality of six different wheat varieties when subjected to both natural and accelerated ageing environments.
Which key parameters are used to assess seed quality?
The study primarily utilizes standard germination percentage and the calculated seed vigour index as the main indicators of seed quality throughout the storage period.
What is the main objective of the study?
The objective is to provide reliable data on the shelf-life and storability of wheat genotypes to identify which varieties act as "good" or "poor" storers.
Which scientific methodology is employed?
The research uses standard germination tests following ISTA rules and calculates vigour indices using the Abdul-Baki and Anderson formula after subjecting seeds to both ambient storage and high-stress accelerated ageing.
What does the main section cover?
The main body discusses the experimental results, showing that storage life varies significantly by genotype, with PBW-502 performing well and RAJ-3765 showing poor storage characteristics.
How would you describe the essential keywords?
The research is characterized by terms related to seed physiology, such as accelerated ageing, seed storability, and genotype-specific deterioration processes.
Which wheat variety was identified as the best storer?
The study concludes that variety PBW-502 demonstrated the best storage potential under both natural and accelerated ageing conditions.
How does accelerated ageing compare to natural ageing?
The results indicate that accelerated ageing causes faster seed deterioration compared to natural ageing due to constant, severe environmental stress compared to the fluctuating temperature and humidity of natural storage.
What physiological factor contributes to the loss of seed viability?
The authors suggest that the loss of germination and vigour is closely associated with the loss of membrane integrity and decreased cellular repair systems.
- Citar trabajo
- Davender Chauhan (Autor), D. P. Deswal (Autor), 2010, Determination of Seed Storage Potential of Natural and Accelerated Aged Wheat (Triticum aestivum), Múnich, GRIN Verlag, https://www.grin.com/document/176550
