Division of Plant Physiology, Indian Agricultural Research Institute, New Delhi-110012
The effect of moisture stress on correlation coefficient between different morphological parameters of yield in sunflower was studied in thirty-six genotypes under field conditions. Results indicated that there was reduction in the seed yield and per cent oil content due to moisture stress in all genotypes. Morphological parameters such as plant height, stem and head diameter, head and 100-seed weight showed to bear a positive and significant correlation under irrigated conditions. Whereas under moisture stress conditions, all these characters except stem diameter were found to be associated with seed yield. A positive correlation of oil content with per cent filled seeds and a negative with seed to husk ratio were noticed.
