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研究了８个水旱稻杂种高代（Ｆ７，Ｆ８）株系和４个对照亲本的抗旱生理特性（或形态特征）及主要农艺性状，并进行了抗旱性的多元遗传分析和细胞学鉴定。结果表明，在旱地栽培条件下杂种（５），（１），（１２），（１０）号株系的种子高渗溶液发芽率、离体叶片保水率、细胞质膜稳定性和分蘖秆长整齐度均显著大于对照水旱稻和其它杂种株系，表明这４个杂种株系具有较强的抗旱性，同时丰产性测验结果也表明它们具有较高的丰产性，说明所测的这５项抗旱指标在生产上实际应用的可靠性。抗旱性的相关遗传力分析结果表明，通过５项抗旱指标间接选择抗旱总级别和单株粒重的效率不同，其中以分蘖秆长变异系数间接选择的效率最大。
The drought resistance physiological characteristics (or morphological characteristics) and major agronomic traits of eight highland hybrid rice F7 and F8 lines and four control parents were studied, and multiple genetic analysis and cytological identification of drought resistance were carried out. The results showed that the seed germination rate, the leaf water retention rate, the plasma membrane stability and the tillering length of the hybrids (5), (1), (12) and (10) Were significantly higher than those of the control paddy and other hybrid lines, indicating that these four hybrid lines have strong drought resistance, while the high yield test results also showed that they have a high yield, indicating the measured five drought The reliability of indicators in practical application. The results of heritability analysis of drought resistance showed that the efficiency of indirect selection of the total drought-resistance level and individual grain weight was different through five drought resistance indexes, of which indirect selection was the most efficient with the coefficient of variation of tillering culm length.