Evaluation of rapeseed mutants under drought stress at flowering stage in terms of yield, oil percentage and stress tolerance indices

Articles in Press

Document Type : Research Paper

Authors

1 Department of Agronomy, Faculty of Agriculture, University of Zabol, Zabol, Iran

2 Department of Agronomy,Faculty of Agriculture,University of Zabol,Zabol,Iran

3 Nuclear Agriculture Research School

10.22034/saps.2025.60762.3191

Abstract

Background & Objective: The goals of study was conducted to identify mutants with more stable performance and greater tolerance to drought stress, and to find suitable solutions for crop production in dry environments.
Materials and Methods: the present study was conducted in two separate experiments based on a randomized complete block design with three replications during 2015-2016 and 2017-2018 at the Karaj experimental farm of Nuclear Agriculture Research School. Seven rapeseed genotypes [three cultivars as a witness, Okapi. Licord and RGS003 and four mutant lines from the maternal base RGS003: MRGS9, MRGS14, MRGS16 and MRGS31] were investigated.
Results: The highest grain yield was observed in MRGS31 genotype under full irrigation and cessation of irrigation conditions. Also, the 1000-seed weight and biological yield were higher in MRGS31 genotype than other genotypes. The highest and lowest first lateral branch heights were shown by Okapi and MRGS9 genotypes. In the cessation of irrigation condition, the highest and lowest oil percentages were observed in MRGS31 and Okapi genotypes, respectively. Among the studied indices, MP, GMP and STI indices, due to having a positive correlation with yield in both full irrigation and cessation of irrigation conditions, are the best indices for selecting and determining rapeseed tolerant genotypes. Based on the mentioned indices and biplot diagram, the MRGS31 genotype was identified as having the most tolerant among the studied genotypes.
Conclusions: Considering that rapeseed mutants in both full irrigation and cessation of irrigation conditions had higher yield than the control treatment.

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Journal of Agricultural Science and Sustainable Production

Articles in Press, Accepted Manuscript
Available Online from 23 October 2026

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