a study of seed germination and seedling growth indices of oilseed rape (brassica napus l.) cultivars through seed vigour tests
نویسندگان
چکیده
to evaluate the effects of accelerated aging and cold stress on seed germination and seedling growth indices in five oilseed rape cultivars (hyola330, hyola401, hyola420, syn3 and pr401/15e), an experiment was carried out in a completely randomized design of three replications. results indicated that the cultivars were significantly different in germination percentage, seed vigour, germination rate and seedling length under standard germination, cold stress and accelerated aging conditions. the cultivars hyola401, pr401/15e and syn-3 in standard germination, hyola401 in cold test and pr401/15e and syn-3 in accelerated aging test exhibited the highest germination percentages. furthermore, hyola420 had the lowest germination percentage in all the 3 tests. the cultivars were different for seedling length, seed vigour index and germination rate in different tests, so that pr401/15e, in standard germination and accelerated aging test, and syn-3, in cold test, had the highest seedling lengths. moreover, pr401/15e in standard germination test, syn-3 and hyola401 in cold test and hyola401, and pr401/15e in accelerated aging test, bore the highest seed vigour index. as for germination rate, pr401/15e, hyola401 and syn-3 carried the highest values in standard germination, cold and accelerated aging tests, respectively. in total, evaluation of the germination indices under stress conditions indicated that the seeds of high vigour were less affected by cold stress and accelerated aging tests, the difference between their germination indices under normal and under stress conditions being low. furthermore, accelerated aging decreased canola seed vigour more than did cold stress. this indicates that canola seeds lose their quality in high temperatures more rapidly than they do at low ones, so seed vigour would strongly decrease if seeds stored in unsuitable conditions of high temperature and moisture. therefore, proper storage conditions of canola seeds are important before sowing of the seeds next year.
منابع مشابه
Hidden Effects of Seed Quality Breeding on Germination in Oilseed Rape (Brassica napus L.)
Intense selection for specific seed qualities in winter oilseed rape breeding has had an inadvertent negative influence on seed germination performance. In a panel of 215 diverse winter oilseed rape varieties spanning over 50 years of breeding progress in winter-type rapeseed, we found that low seed erucic acid content and reduced seed glucosinolate content were significantly related with prolo...
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Mutation induction is considered as an effective way to enrich plant genetic variation, particularly for traits with a very low level of genetic variation. The objectives of this study were to evaluate the effect of different dosages of chemical mutagens on seed germination, seed viability and seedling growth characteristics and to identify optimum treatment conditions for chemical mutagens bas...
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متن کاملEvaluation of growth and seed yield of new winter oilseed rape (Brassica napus L.) genotypes under terminal drought stress conditions
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متن کاملEFFECTS OF NaCl TREATMENTS ON SEED GERMINATION AND ANTIOXIDANT ACTIVITY OF CANOLA (BRASSICA NAPUS L.) CULTIVARS
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متن کاملCorrigendum: Heat Stress during Seed Filling Interferes with Sulfur Restriction on Grain Composition and Seed Germination in Oilseed Rape (Brassica napus L.)
[This corrects the article on p. 213 in vol. 6, PMID: 25914702.].
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عنوان ژورنال:
علوم گیاهان زراعی ایرانجلد ۴۰، شماره ۲، صفحات ۰-۰
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