ĐÁNH GIÁ KHẢ NĂNG CHỊU HẠN CỦA 10 DÒNG NGÔ THUẦN Ở GIAI ĐOẠN CÂY CON VÀ TRONG THÍ NGHIỆM CÓ ĐIỀU KHIỂN TƯỚI

The research conducted at Song Boi Maize Research and Seed Production Center for drought tolerance of 10 inbred lines on the seedling stage and on the field with controlled irrigation. The studies showed that: the named lines V2, V5, V3, IL6 had good tolerance on drought condition within 5 days stopped watering and high restore when continued supplying water; germination percentage of all lines varied from 25.1% to 70.2% in 20% PEG concentration, germination of V2, V5 more than 60% and their seedling longer than checks (IL6 and D6); evaluation of the lines based on Zadod method identified V2, V5, V3 were not wilt at the flowering stage; on the controlled irrigation experiment, all the lines presented longer maturity from 3 - 6 days when stopped supplying water from 7-9 leaf to milky stage and among of them, V5 and V2 lines produced higher yield.