【摘要】 为了给三系杂交稻新品种选育提供优良亲本,以"嘉花1号"水稻为转育亲本,与香型软米水稻杂交,再与"嘉花1号"水稻多代回交及自交,结合分子标记辅助选育香软型水稻新品系"SH101B"."嘉花1号"与"SH101B"水稻主要农艺性状和产量性状差异都不显著（p>0.05）."SH101B"稻米直链淀粉含量（质量分数）为10.0%,明显低于"嘉花1号"水稻（15.2%）.又将"SH101B"与三系不育系水稻杂交和回交,转育获得香软型三系不育系"SH101A",再与籼型恢复系"T201"进行配组,并对后代农艺性状、产量和稻米品质进行分析.结果显示,"SH101A×T201"组合稻米直链淀粉含量为12.8%,每亩产量达到848.1 kg(12 726.4 kg·hm^-2).更多还原

【Abstract】 In order to provide excellent parents for breeding new cytoplasmic male sterility（CMS） line rice varieties,we developed a new rice strain,"SH101 B",by molecular marker-assisted gene pyramiding,using hybridizing between non-fragrant and non-soft rice "Jiahua No.1" with a fragrant soft rice,and backcrossing with "Jiahua No.1" rice for multi-generation,and then selfcrossing.There were no significant differences between "Jiahua No.1" and "SH101 B" in main agronomic and yield traits（p>0.05）.The amylose content（mass fraction） of "SH101 B" rice was 10.0%,which was significantly lower than that of "Jiahua No.1" rice（15.2%）.In this study,"SH101 B" was crossed and backcrossed with three-line sterile line rice to obtain fragrant and soft three-line sterile line "SH101 A",which was then paired with Indica restorer line "T201",and its offspring were analyzed for agronomic traits,yield and rice quality.The results showed that the amylose content of "SH101 A×T201" rice was 12.8% and the yield reached 12 726.4 kg·hm^-2.更多还原