【摘要】 选用3个水稻品种和2个陆稻品种,在正常水分管理、分蘖期及抽穗期水分胁迫下调查产量及产量相关性状的变化来评价各个材料对水分胁迫的反应.结果表明:水稻和陆稻在不同生育期水分胁迫条件下都表现出不同程度的减产,但陆稻品种较水稻品种更能在水分胁迫条件下保持高产、稳产,说明通过水稻品种改良以提高水稻品种在水分胁迫条件下的高产性、稳产性是可能的.更多还原

【Abstract】 Five rice cultivars from two ecotypes,including three paddy rice cultivars and two upland rice cultivars,were used to determine their drought adaptability based on the responses of their yield and yield components to drought stress at tillering or heading stages.The results showed that the yield of all the cultivars decreased under drought stress at either tillering or heading stage.However,upland rice cultivars exhibited higher stability in yield than paddy rice cultivars under drought stress conditions,indicating that it is possible to use upland rice cultivars to improve the drought performance of paddy rice cultivars.更多还原