Evaluation results of the drought tolerance in artificial conditions of peanut lines and varieties for developing materials in the work of selective breeding

Abstract

The experiment evaluated 179 peanut lines/varieties, which were collected in Vietnam or imported from abroad, by the method of assessing drought tolerance at the germination stage when planting in plastic pipes with 5 cm in diameter, 7 cm in height, and 3 layers of wax. Each 3 mm layer of wax was created by mixing paraffin and vaseline at a ratio of 6:4 and hardness of 1.5 Mpa. 24 lines/varieties were selected with a good penetration of their roots through the wax layers. The evaluation under artificial conditions in the flowering period through the soil moisture assessment at the time of wilting had selected 30 peanut/lines varieties which have good drought tolerance. The assessment on the wilting level and restoration ability of the peanut/lines varieties under the conditions of 10-day drought and 3 days of irrigation had selected 42 peanut/lines varieties with a good resilience in the flowering and seed formation stages. The selected lines/varieties are a good source of materials for breeding drought-tolerant varieties.