Exploring the Physiology and Genetic Stability of Rapeseed Plants for Assessing Oil Content in Western Iran

Document Type : Original Article

Authors

1 Department of Production Engineering and Plant Genetics, Payame Noor University, Tehran, Iran

2 Department of Plant Genetics and Production, Faculty of Agricultural Sciences and Engineering, Campus of Agriculture and Natural Resources, Razi University, Kermanshah, Iran

3 Department of Biotechnology, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran

Abstract

Identifying canola genotypes with high oil percentages and stability across diverse environmental conditions is crucial for breeding programs aiming to enhance crop productivity. Drought stress poses a significant challenge to canola yield, making the selection of adaptable genotypes imperative. This study investigates genotype-environment interaction (GEI) to identify stable canola genotypes with consistent oil percentages under varying conditions. Field experiments over two years in irrigated and rainfed environments evaluated fourteen genotypes using a randomized complete block design. Analysis of variance (ANOVA) revealed significant GEI effects, prompting a search for stable genotypes using stability analysis methods such as AMMI (Additive Main Effects and Multiplicative Interaction) and GGE (Genotype and Genotype by Environment Interaction) biplots. Results highlight Licord as the most stable genotype, maintaining consistent oil percentage across environments. Genotypes 12, 14, and 5 exhibit minimal interaction, indicating stability, while genotypes 5, 7, 8, and 9 are more influenced by environmental factors, emphasizing the need for targeted breeding strategies.

Graphical Abstract

Exploring the Physiology and Genetic Stability of Rapeseed Plants for Assessing Oil Content in Western Iran

Highlights

  • Rapeseed (Brassica napus L.) is a high-yielding oil crop extensively cultivated for its oil-rich seeds, which contain over 40% oil.
  • Rapeseed meal is an excellent source of protein, containing approximately 35-40% protein in addition to its oil content.
  • Drought stress is a major environmental factor that can negatively affect canola yield, and selecting genotypes that are adapted to these conditions can improve crop productivity and stability.
  • Genotype-environment interaction (GEI) plays a crucial role in crop breeding and selection, as the yield of a genotype can vary across different environments.
  • It is necessary to evaluate the yield of canola genotypes under different environments to identify the most stable ones that perform consistently well across different conditions.
  • The study provides useful information for plant breeders and researchers working on developing new winter rapeseed varieties in east Iran, and the results can guide breeding programs aimed at improving the stability and adaptability of these varieties.

Keywords

Main Subjects

References

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Agrotechniques in Industrial Crops
Volume 5, Issue 1
Agrotechniques in Industrial Crops (Agrotech Ind Crops) (Online ISSN: 2783-2945)
March 2025
Pages 34-45

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