Chilling Tolerance of Recombinant Inbred Rice Lines Tested in Different Low Temperature Environments

Chilling injury is one of the major environmental concerns in rice cultivation especially in areas of high altitude and latitude. Thus, Wenzhu Jiang of Seoul National University and colleagues conducted the study entitled Genotype × environment interactions for chilling tolerance of rice recombinant inbred lines under different low temperature environments. The researchers cultivated a set of inbred rice lines that went through genetic recombination and derived from areas of high altitude, high latitude, cold irrigation and normal conditions, to analyze the effect of both genes and environment for chilling tolerance. The rice lines planted in high altitude area were the most injured by high temperature. Statistical analyses were conducted to further analyze the interactions of genes and environment. Rice from high altitude and high latitude locations were more sensitive to genetic makeup and environment for chilling tolerance, compared to rice cultivated in cold water irrigations. Therefore, multi-locational screening is the most effective technique for developing extensively resilient chilling-tolerant varieties of rice.

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