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以香稻不育系GHS与无香味恢复系和香稻品种杂交,采用咀嚼法测定杂交组合F1米粒和KOH溶液法测定杂交组合F1、F2、BC1F1植株的香味遗传特点。结果表明,恢复系无香味为显性性状,GHS的香味为隐性性状;GHS的香味基因与粤香占、湘晚籼17号的香味基因不等位;GHS的香味基因与玉香油占、天龙香103、新万香、创香5号香味基因可能存有等位位点。与无香味恢复系杂交组合F2植株群体无香味与有香味之比符合3∶1的分离比,BC1F1植株群体符合1∶1的分离比,GHS的香味遗传受1对隐性核基因控制。在杂交水稻育种中,利用GHS系统选育出琼香S,并选配出一批香型杂交稻组合,其中琼香两优1号、琼香两优2号等高产优质组合已通过省级审定,具有较好的应用前景。
The genetic characteristics of the scent of F1, F2 and BC1F1 in F1 hybrids were detected by chewing F1 hybrid rice and KOH solution method. The results showed that the restoring lines had no aroma as dominant trait, GHS aroma as recessive trait. The gene of GHS was not allelic to that of Xiangxiangzhan and Xiangbianxian 17, Tianlongxiang 103, the new million incense, Chong Hong 5 flavor genes may have alleles. The ratio of non-scented to scented F2 plants in a cross with non-fragrant restorer lines was in a 3: 1 segregation ratio. The population of BC1F1 plants had a segregation ratio of 1: 1. The genetic predisposition of GHS was controlled by a recessive nuclear gene. In the hybrid rice breeding, the GHS system was used to breed Qionghong S, and a batch of fragrant hybrid rice combinations were selected. Among them, Qiongxiang Liangyou 1, Qiongxiang Liangyou 2 and other high-yielding quality combinations had passed the provincial Validated, with good prospects for the application.