اثرات شرايط محيطي طي پرشدن قوزه بر جوانه زني و رشد گياهچه بذور حاصله ارقام پنبه

The effects of environmental conditions during seed filing on subsequent germination and seedling growth in cotton

Three cotton cultivars of Sahel, Siokra and Deltapaine were sown in different dates, and their seeds were harvested at the stage of the opening of the bolls. Then germination tests were conducted on these seeds. The percent of germination, the length of root and shoot and the dry weight of the root and shoot and the total seedling dry weight were measured. Results showed that the planting date did not have any significant effect on the germination percentage and the length of the root and shoot. But with delay in planting date, the dry weight of root and shoot and the total seedling dry weight in Deltapaine decreased significantly. However, two other cultivars were not affected by planting date. These results show that under the condition of this experiment , the seeds of Deltapaine cultivar that are produced from the earlier planting dates have more seedling growth rate compared with those produced seeds from the later planting dates. But the seedling growth rate was similar for other two cultivars obtained from different planting dates.