三、种间杂交杂种衰弱Hybrid weakness 四、杂种不育hybrid sterility 五、杂种衰败hybrid breakdown 六、栽培稻杂种不育性hybrid sterility in Oryza sativa Biology of plant reproductionBiology of plant reproduction 2 三、种间杂交杂种衰弱Hybrid weakness 四、杂种不育hybrid sterility 五、杂种衰败hybrid breakdown 六、栽培稻杂种不育性hybrid sterility in Oryza sativa