Genetic variability for frost resistance among Coffea accessions assessed in the field and in a cold chamber

摘要

The genetic variability for frost resistance was evaluated in field conditions and cold chamber among Coffea accessions. Results showed that C liberica var. dewevrei and C racemosa as well as hybrids obtained from these species were more resistant to frost. There was a great genetic variability for frost resistance among the evaluated sources (b2 = 0, 98). The correlation estimated between damages in the field and in the cold chamber was 0. 933**, therefore, this methodology was efficient and feasible and could be potentially used in a breeding program.