Yield and Yield Components in Terms of Moisture Stress and Non-Stress Conditions in the Spring Safflower Varieties 1
Safflower (Carthamus tinctorius L) is a native of Iran oil seed. This crop is compatible with the environmental conditions in the country as well; this is especially true in areas exposed to non-biological stresses such as drought and salinity. In 2000, a research was conducted to investigate the relationship between two sets of variables. This research was in split-plot form with completely random block designs, twice the normal (7 irrigations) and two drought (6 and 5 irrigations,
... ations, respectively) using 26 spring safflower varieties. In this study, several parameters were measured and studied: days to germination, days to stem growth, days to 50% budding, days to 50% flowering, days to 100% flowering, bush height, number of bolls per plant, seeds per boll, 1000 grain weight, plant performance, and oil content measuring. In this study, canonical analysis was performed between the two groups of phonological characteristics and traits related to yield and yield components. The results showed the impact of 1000 grain weight and yield per plant on W1 function and in terms of severe stress. But function V1 is influenced by some phonological traits especially the number of days to 100% flowering, the number of days to 50% flowering and the number of days to 50% budding. In terms of moderate stress (6 times irrigations), W1 function is greatly influenced by 1000-grain weight but some phonological traits like days to 100% flowering, days to 50% flowering and days to 50% budding impress function V1. In fact for the selection of cultivars for height yield under both stress conditions, these can be considered as an appropriate criterion: days to 100% flowering, days to 50% flowering and days to 50% budding. Based on the results of canonical correlation analysis and in terms of non-stress conditions, W1 function is influenced by 1000-grain weight but V1 function is influenced by some phonological traits such as the days to 100% flowering and days to 50% flowering. So for the selection of cultivars for height yield under normal conditions, we can consider the days to 100% flowering and the days to 50% flowering as appropriate phonological criterion.