Effect of drought stress during flowering and seed maturity of mother plant on some related to seed germination and seedling vigor traits of various oilseed rape (Brassica napus L.) winter cultivars

Document Type : Research Paper

Authors

1 Agronomy Msc graduate of Pishva Varamin Islamic Azad University

2 Seed and Plant Certification and Registration Institute(SPCRI)

3 Islamic Azad University, Varamin(Pishva), Agriculture College

Abstract

In order to study drought stress during flowering and seed maturity and normal irrigation effect on mother plant on some seed germination and seedling vigor related traits of 10 oilseed rape winter cultivars, an experiment was conducted as factorial, based on completely randomize design by four replications, during 2013 in experimental field of Seed and Plant Improvement Institute (SPII) and seed quality analysis laboratory of Seed and Plant Certification Research Institution(SPCRI) at Karaj. Experiment treatments were seeds produced under normal irrigation(S1) and drought stress exertion by non irrigation at flowering and maturity stage(S2) of 10 oilseed rape winter cultivars. One thousand weight, density and electrical conductivity of seeds measured and by standard germination test conduction, final germination percent, mean germination time, seedling length and dry weight were determined. Results indicated that mean germination time and seedling length were not affected by studied treatments and also final germination percent of studied cultivars had not significant difference. Highest thousand seed weight was related to Zarfam cultivar which seeds produced by normal irrigation treatment and Orient and SLM046 cultivars had highest seed density produced by normal irrigation treatment. Zarfam cultivar seeds produced by drought stress treatment had highest and Milena and Modena cultivars seeds produced by normal irrigation treatment had lowest electrical conductivity. Seeds produced by normal irrigation treatment had highest final germination percent. Highest seedling dry weight in normal irrigation condition belong to Geronimo and under drought stress condition related to Okapi cultivar. Generally, this experiment results showed that drought stress at flowering and maturity duration caused studied genotypes seed quality decrease, but under that conditions, Geronimo, Zarfam, Dexter and Licord cultivars had higher seed thousand weight, Orient, Modena and Dexter cultivars more seed density, Milena and Modena cultivars lower electrical conductivity and, Okapi and Modena cultivars higher seedling dry weight in comparison with other studied cultivars. Therefore can produce those cultivars having relatively optimum germination quality and seedling vigor traits seed.

Keywords

References

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Iranian Journal of Seed Sciences and Research
Volume 4, Issue 2
September 2017
Pages 109-121

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