Proceedings of The 7th International Conference on Innovation in Science and Technology
Study on Genetic Diversity of Some of the Barley (Hordeum Vulgare L.) Cultivars Using Morphophysiological Traits under the Chilling Stress
Kowsar Haghpanah, Seyed Reza Mirfakhraei
Plants are invariably exposed to a broad range of non-biological stresses, such as cold stress. These stresses have undesirable effects on the survival, growth, quality, and quantity of crops. This research has applied the genetic diversity of 20 cultivars of barley using physiological traits related to chilling tolerance, amino acid proline, pigments (chlorophyll a, chlorophyll b, total chlorophyll, and carotenoids). Some yield indicators (spike length, weight of the main spike, 1000-grain weight, number of fertile tillers, and grain weight per plant) were tested in conditions controlled by the in-situ composite analysis model based on a completely randomized design, including four locations (Control temperature levels (+8˚C), +2˚C, 0˚C, and -2˚C) and three replication. The results of the analysis of variance indicated that the interaction of cultivar in cold was significant for all traits at the level of 1% probability. Cluster analysis divided the cultivars of control and severe stress levels (-2˚C) into 5 groups. The biplot obtained from GGbiplot illustrated a considerable phenotypic variation in the studied germplasm.
Keywords: barley, genetic diversity, chilling stress.