利用分子标记辅助选育国庆稻“香软早粳”新品系及试种

Development of“Xiangruan Zaogeng”National Day rice by molecular marker assisted selection

为了培育适合上海地区种植的香软优质国庆稻,本研究以“松早香1号”和“上师早早香”为亲本进行杂交(F_(1))并连续自交(至F_(4)),结合软米基因分子标记辅助筛选和田间农艺性状选择,成功培育出优质香软国庆稻“香软早粳”新品系.与“松早香1号”相比,“香软早粳”成熟期提前了15 d,每亩(约666.67 m^(2))产量可增加84.9 kg,不仅提早了国庆稻的上市时间,同时提高了种植国庆稻的经济效益.稻米品质检测结果显示,“香软早粳”稻米直链淀粉含量(质量分数)为9.7%,胶稠度达80 mm.“香软早粳”含有香味基因,属于优质香软米.“香软早粳”新品系的成功选育为上海地区推广特早熟香型软米水稻奠定了基础.

In order to obtain high-quality fragrant and soft National Day rice suitable for cultivation in Shanghai,“Songzaoxiang No.1”and“Shangshi Zaozaoxiang”crossed to produce F_(1),which was self-crossed till F_(4),accompanied simultaneously by soft rice gene molecular marker assisted screening and field agronomic trait selection,producing ultimately,a new soft rice line with high-quality fragrant,named as“Xiangruan Zaogeng”.Compared with“Songzaoxiang No.1”,the maturation of“Xiangruan Zaogeng”was 15 d ays early,its yield was also increased by 84.9 kg/mu(~666.67 m^(2)),entering the market earlier and getting better economic benefits.The quality testing results showed that the amylose content of“Zaogeng”was 9.7%,gel consistency was 80 mm,and have aroma genes,belonging to high-quality fragrant soft rice.The successful breeding of the“Xiangruan Zaogeng”lays the foundation for the promotion of early maturing fragrant and soft rice in Shanghai.