Screening of Triticum turgidum genotypes for tolerance to drought stress
Drought is one of the major abiotic stresses leading to reduced yields and economic losses. Effective germplasm screening for drought tolerance particularly under managed water-deficit conditions is an effective way of selecting materials for advanced breeding programs. Here, 37 Triticum turgidum ge...
Saved in:
| Published in: | Plant physiology and biochemistry Vol. 194; pp. 271 - 280 |
|---|---|
| Main Authors: | , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
France
Elsevier Masson SAS
01-01-2023
|
| Subjects: | |
| Online Access: | Get full text |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Drought is one of the major abiotic stresses leading to reduced yields and economic losses. Effective germplasm screening for drought tolerance particularly under managed water-deficit conditions is an effective way of selecting materials for advanced breeding programs. Here, 37 Triticum turgidum genotypes, including landraces, ancient and modern genotypes, along with 2 tritordeum cultivars, were subjected to water-deficit stress through the application of 10% (w/v) PEG 6000 and to re-watering treatment in controlled environment, and at the end of each treatment, several physiological and morphological traits were investigated. Our results revealed large variation in shoot and root fresh weight, proline, chlorophyll, and MDA concentration, and also in root morphological traits across the 37 genotypes. The hierarchical clustering of the physiological and morphological traits led to the identification of tolerant and sensitive genotypes to water-deficit stress and also reveals those genotypes characterized by deep-rooting and shallow-rooting systems. By integrating both datasets, three outstanding genotypes, namely Karim, Svems 20, and Svems 18 were identified as the most tolerant genotypes with deep-rooting system. On the other hand, Iride and Bulel tritordeum, were introduced as the most sensitive genotypes with shallow-rooting system.
•Large variation in shoot and root fresh weight, proline, chlorophyll, and MDA concentration were recorded across the 37 genotypes of durum wheat in response to water-deficit stress and rewatering conditions.•The drought-tolerant and drought-sensitive genotypes were extracted from the hierarchical clustering of physiological traits.•Using hierarchical clustering of root traits across 37 genotypes, three main clusters were obtained representing deep-rooting, medium-depth rooting and shallow-rooting systems.•Three genotypes, namely Karim, Svems 20, and Svems 18 were introduced as the most tolerant genotypes with deep-rooting system. |
|---|---|
| Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
| ISSN: | 0981-9428 1873-2690 |
| DOI: | 10.1016/j.plaphy.2022.11.025 |