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Physiological traits, yield, and yield components relationship in winter and spring canola.
Abbas Biabani1, Abbas Foroughi1, Alli Rahemi Karizaki1
1Department of plant production, Gonbad Kavous University, Gonbad Kavous, Iran.
Journal of the Science of Food and Agriculture
|January 16, 2021
Summary
High-yielding canola cultivars depend on physiological traits like radiation use efficiency (RUE). Later development of maximum leaf area index (LAI) correlated with higher RUE, leading to increased seed yield in Brassica napus L.
Area of Science:
- Agricultural Science
- Plant Physiology
- Crop Science
Background:
- Understanding physiological traits is key for developing high-yielding and quality canola (Brassica napus L.) cultivars.
- This study investigates the link between physiological features, including radiation use efficiency (RUE), and seed yield in canola.
Purpose of the Study:
- To explore the relationship between physiological traits and seed yield in canola.
- To identify key physiological factors contributing to enhanced biomass and seed yield in Brassica napus L.
Main Methods:
- Assessed differences in maximum leaf area index (LAImax) and days to achieve maximum LAI (DLAImax) among canola cultivars.
- Measured intercepted photosynthetically active radiation (IPAR) and calculated radiation use efficiency (RUE).
- Analyzed crop growth rate and harvest index in relation to yield.
Main Results:
- Significant variations in LAImax and DLAImax were observed across cultivars.
- Cultivars reaching maximum LAI later showed higher IPAR and RUE.
- Average canola RUE was 3.80 g MJ⁻¹ m⁻² in 2014 and 3.63 g MJ⁻¹ m⁻² in 2015.
Conclusions:
- Growth duration, crop growth rate, and harvest index are critical for improving canola biomass and seed yield.
- A significant correlation exists between RUE and DLAImax.
- Cultivars with later maximum LAI development exhibit higher RUE, biological yield, and seed yield, informing breeding programs and crop models.
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