【摘要】 从可交配性和F1杂种育性两方面对亚洲栽培稻与AA染色体组(以下简称AA组)其他7个稻种的系统关系进行了分析。结果表明:栽培稻籼、粳亚种与AA组不同稻种杂交均具有一定的结实率,可交配性不是影响亚洲栽培稻与其他AA组稻种间基因交流的主要生殖障碍。亚洲栽培稻与普通野生稻及尼瓦拉野生稻种间F1花粉育性和小穗育性有不同程度分化,与其他稻种的F1花粉育性和小穗育性均很低,F1杂种不育是AA组内基因交流的主要障碍。综合可交配性和F1小穗育性两方面的因素,初步得出:亚洲栽培稻与AA组稻种的亲缘关系由近及远依次是:普通野生稻、尼瓦拉野生稻、南方野生稻、展颖野生稻、非洲栽培稻、长雄蕊野生稻和短舌野生稻。其中普通野生稻和尼瓦拉野生稻是AA组中可直接利用于水稻育种的野生稻资源。更多还原

【Abstract】 Systematic relationship between Oryza sativa and other seven rice species with AA genome were analyzed based on their crossability and F1 hybrid fertility.The results indicated that all crosses between O.sativa(including indica and japonica subspecies) and different species with AA genome produced certain seed-setting rates,suggesting that crossability were not the main barriers influencing on the gene flow between the Asian cultivated rice and other species with AA genome.The pollen fertility and spikelet fertility of interspecific hybrids F1 between O.sativa and O.rufipongon or O.nivara were high or low,varying for different accessions.But the interspecific hybrids F1 between O.sativa and other species except for O.rufipongon or O.nivara possessed much lower pollen fertility and spikelet fertility.Therefore,F1 hybrid sterility was the main reproductive barrier influencing on the gene flow within AA genome.Based on the crossability and the F1 spikelet fertility,the relative relationship(from the close to the distant) between O.sativa and other species with AA genome was suggested as follows: O.rufipogon,O.nivara,O.meridionalis,O.glumaepatula,O.glaberrima,O.longistamanata and O.barthii.Among them,O.rufipongon and O.nivara might be the most useful wild rice resources that could be directly applied to rice breeding.更多还原