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April 8, 2026Plant Breeding

Genetic Variability, Heritability and Trait Associations of Morpho‐Physiological and Yield‐Related Traits in Rapeseed ( Brassica napus L.) Under Terminal Heat Stress: Implications for Heat‐Tolerant Breeding

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Authors

MSMohammad Reza SiahpooshAPAmeneh Pakraei

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Overview

Field evaluations demonstrate heat adaptation traits in rapeseed, suggesting criteria for breeding heat-tolerant varieties.

Key Points

  • The aim is to define effective selection criteria for heat adaptation in rapeseed under terminal heat stress.
  • Field evaluations conducted over two growing seasons
  • Characterization of physiological, morphological, and yield-related responses
  • Use of multivariate analyses to discriminate among genotypes
  • Assessment of heritability for key physiological indicators
  • Heat stress decreased yield performance due to disrupted photosynthesis and water relations
  • Canopy temperature and stomatal conductance showed high heritability as indicators of heat adaptation
  • Morphological traits like plant height and number of siliques correlated with seed yield
  • Genotypes Hyola 61 and Hyola 50 showed better adaptation, while Agamax and Hyola 401 were susceptible

Cite This Study

Siahpoosh et al. (2026) studied this question.

synapsesocial.com/papers/69d5f13674eaea4b11a7ac82https://doi.org/10.1111/pbr.70073
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