Improved rice lines were developed frome three parents with the resistance or tolerance to bacterial leaf blight, blast and drought stress, respectively, using single-, double- and three-way crosses. The improved lines were assessed for agro-morphological and yield traits under non-drought stress (NS) and reproductive-stage drought stress (RS) treatments. The mean comparison of traits measured between parent plants and progenies (improved lines) were similar, and there were significant and non-significant differences among the parents and improved lines (genotypes) under NS and RS. Smilarly, there was significant and non-significant differences in the interaction among both parent varieties and improved lines for NS and RS. Cluster and 3D-model of principal component analysis did not generate categorical clusters according to crossing methods, and there were no exclusive crossing method inclined variations under the treatments. The improved lines were high-yielding, disease resistant, and drought-tolerant compared with their parents. All the crossing methods were good for this crop improvement program without preference to any, despite the number of genes introgressed.

使用单向，双向和三向杂交技术，从三个亲本分别对细菌性叶枯病，稻瘟病和干旱胁迫产生抗性或耐受性，开发出了改良的水稻品系。在非干旱胁迫（NS）和生殖阶段干旱胁迫（RS）处理下，对改良品系的农业形态和产量性状进行了评估。在亲本和后代（改良品系）之间测得的性状的平均比较是相似的，并且在NS和RS下，亲本和改良品系（基因型）之间存在显着和非显着差异。令人高兴的是，两个亲本品种之间的相互作用以及NS和RS的改良品系之间都存在显着和非显着的差异。主成分分析的聚类和3D模型没有根据交叉方法生成分类聚类，处理过程中没有排他性的交叉方法倾斜变化。与亲本相比，改良品系具有高产，抗病和耐旱的特性。尽管有许多基因渗入，但所有杂交方法都对这种作物改良计划有益，而不偏重任何一种。