Predicting Cotton Seedling Emergence for Cold Tolerance: Gossypium barbadense

摘要

A total of 9 genotypes from G. barbadense were screened at 5 different tests to determine the best screening test to predict field emergence. Warm germination percentage was measured at 30°C and ranged from 87.5 to 99.2%. Cool germination percentage s were measured at 13, 15 and 18°C. Multiple regressions were used to determine degree of association between variables. Predicting field emergence with combinations of 30 and 18°C tests (difference between 30 and 18°C) was better than other tests alone. No significant relation was found between field emergence percentages and 15 and 13°C germination percentage s.