在旱地条件下,通过比较水陆稻、水稻、陆稻杂种一代15个农艺性状的杂种优势,发现水陆稻的抽穗日数和全生育期的杂种优势低于陆稻,而穗长高于陆稻,除此之外,三种杂交类型的杂种优势基本上是一致的。在抗旱力方面,水陆稻的杂种优势高于水稻和陆稻,水陆稻杂种一代的抗旱力接近陆稻及陆稻的杂种子一代,明显高于水稻及水稻杂种一代。 Under dryland conditions, the heterosis of fifteen agronomic traits of the hybrids of upland, paddy and upland rice was found to be lower than that of upland rice in heading date and whole growth period, In addition, the heterosis of the three hybrid types is basically the same. In terms of drought resistance, the heterosis of upland rice was higher than that of rice and upland rice. The drought resistance of the hybrid generation of upland rice was close to the hybrid seed generation of upland rice and upland rice, which was obviously higher than that of rice and rice hybrid generation.