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Selection of oil seed sunflower (Helianthus annuus L.) genotypes for seed yield and yield stability using multi-trait stability index (MTSI)
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Nasrin Akbari   , Reza Darvishzadeh |
| Urmia University, Urmia, Iran & Urmia University, Urmia, Iran |
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Abstract: (32 Views) |
Introduction: Success in selecting and introducing genotypes with high yield and stabity is is very important in crop improvement programs, given that their susceptibility to environmental factors and genotype × environment interactions complicates decicon making for crop breeders. Drought stress is one of the important environmental factors affecting yield and drought tolerance is an important traits for crop breeders (Yasar et al., 2023). The aim of this experiment was to identify superior oilseed sunflower genotypes with high seed yield and stability using the multi-trait stability index.
Materials and Methods: In this experiment, 100 oilseed sunflower genotypes were evaluated for 13 agro-morphological traits including; seed yield and seed oil content using simple 10×10 lattice design under two of full irrigation and drought stress conditions in 2013 and 2014 in the village of Qezaljeh, Salmas County, Iran.
Results: Results of combined analysis of variance showed that the effects of genotype and genotype × environment interaction were significant. Therefore, the multi-trait stability index (MTSI) was used to select genotypes with high seed yield and stability. Four factors with eigenvalues greater than one explained 66.2% of the total variation. The MTSI differential selection index presented a success rate of 84.61%. Fifteen genotypes with means higher than the population mean in all traits were selected as genotypes with stability for those traits. The lowest selection differential for the WAASBY index (0.0377%) was observed in seed oil content and the highest index (22.1%) was observed in leaf width. Genotype 8 (254-ENSAT) showed the lowest MTSI index with the highest mean in seven traits: leaf length, petiole length, seed yield, number of days to flowering, number of days to maturity, plant height, and number of leaves, and was therefore identified as the genotype with high stabilty for these traits.
Conclusion: The MTSI index, which uses the advantages of both the Bluop and AMMI methods, is a more efficient index in identifying superior genotypes and developing genotypes with high yield and stability as well as drought tolerant cultivars by using both factor analysis methods and the weighted average of absolute best unbiased linear prediction scores (WAASBY).
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| Keywords: Genotype-ideotype distance, Genotype × environment interaction, Multivariate index, Simultaneous selection and Sunflower |
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Full-Text [PDF 690 kb]
(13 Downloads)
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Type of Study: Scientific & Research |
Subject:
Special
Received: 2025/01/28 | Accepted: 2025/05/6 | Published: 2025/07/1
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