Abstract
Drought is a significant constraint to sugarcane productivity. Therefore, understanding how different varieties of sugarcane respond to drought stress can facilitate breeding programs and set up criteria for selecting drought-tolerant varieties. In the present study, we examined eight morpho-physiological traits to distinguish 40 sugarcane genotypes categorized into four groups based on significant differences in cane yield under non-stressed conditions and reduction of cane yield under drought-stressed conditions. The study was conducted during the formative stage in a greenhouse, encompassing both control and drought conditions. Drought treatments resulted in significant changes and differences in the mean values of various morpho-physiological traits. The hierarchical clustering analysis, utilizing stay-green traits such as higher chlorophyll fluorescence ratio (Fv/Fm), leaf chlorophyll content (SPAD), leaf relative water content (RWC), and lower leaf rolling score (LR), leaf drying score (LD), and drought recovery score (DR), successfully grouped 40 sugarcane genotypes into four major clusters, similar to the previously categorized groups. Correlation analysis showed significant relationships among cane yield, reduction of cane yield under drought conditions, and the stay-green traits. Our results demonstrated that morpho-physiological traits contributing to the “stay-green” phenotypes could be useful as selection criteria for drought tolerance in sugarcane.
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Claims 4
Claim · model-written summary
Drought significantly changed the mean morphophysiological traits.
- Taxon
- Sugarcanee1
- Treatment
- Drought treatmentse0
- Outcome
- mean values of various morpho-physiological traitse0
Not reportedComparatorDirection
Verbatim
e0“Drought treatments resulted in significant changes and differences in the mean values of various morpho-physiological traits.”
e1“Drought Tolerance in Sugarcane”
Claim · model-written summary
Stay-green traits grouped 40 sugarcane genotypes into four clusters matching prior groups.
Verbatim
e0“The hierarchical clustering analysis, utilizing stay-green traits such as higher chlorophyll fluorescence ratio (Fv/Fm), leaf chlorophyll content (SPAD), leaf relative water content (RWC), and lower leaf rolling score (LR), leaf drying score (LD), and drought recovery score (DR), successfully grouped 40 sugarcane genotypes into four major clusters, similar to the previously categorized groups.”
e1“Drought Tolerance in Sugarcane”
Claim · model-written summary
Cane yield, drought related yield loss and stay-green traits were significantly correlated.
- Taxon
- Sugarcanee1
- Treatment
- drought conditionse0
- Outcome
- significant relationships among cane yield, reduction of cane yield under drought conditions, and the stay-green traitse0
Not reportedDirection
Verbatim
e0“Correlation analysis showed significant relationships among cane yield, reduction of cane yield under drought conditions, and the stay-green traits.”
e1“Drought Tolerance in Sugarcane”
Claim · model-written summary
The authors propose stay-green morphophysiological traits as drought tolerance selection criteria.
Verbatim
e0“Our results demonstrated that morpho-physiological traits contributing to the “stay-green” phenotypes could be useful as selection criteria for drought tolerance in sugarcane.”
e1“Drought Tolerance in Sugarcane”