Abstract: Five drought-resistant rice cultivars (hybrids) with high grain yield were selected in early and late seasons from 16 ones on the rainfed field by comparison among them on aspects of their grain yield, drought-resistant coefficient, yield components, leaf area and longevity of the last three leaves, and leaf rolling, leaf withered, yellow leaf, and lodging resistance. They are Xiangfu 93-4, Fufengzao 92-124, 91-1, Weiyou 46, and V989. Grown under drought conditions at booting and seed setting stages, their grain yields are 5. 68－6. 83 t/hm2, and their drought resistant coefficients are 0. 702－0. 859.

Key words: drought-resistance, drought-resistant coefficient, high grain yield, screening

摘要： 在大田生育期只靠雨水灌溉的易旱田，对16个早、晚稻品种（组合）进行了产量、抗旱系数、结实性状、最后三片功能叶面积与寿命及卷叶、黄叶、枯叶状况与抗倒性的比较研究，从中筛选出早稻抗旱高产品种3个，晚稻抗旱高产品种（组合）2个，分别为湘辐93－4、辐丰早92－124、91－1、威优46与V989。在孕穗期与结实期遭受干旱后，其产量为5．68～6．83t／hm2，抗旱系数为0．702～0．859。

关键词: 抗旱, 高产, 抗旱系数, 筛选