前言据报道,水稻有较强的杂种优势,但是制种产量低是杂交稻育种中的最大难题。目前细胞质雄性不育系已应用于杂交水稻的种子生产。为了提高细胞质雄性不育系的种子结实率,在割剑叶后,采用喷“九二○”和赶粉的办法来促进授粉。然而,雄性不育系的异交率仍低于30%。Heu 和 Suh 发现多雌蕊水稻 WX154,Suh等人鉴定了另一个多雌蕊水稻——双稻(Double rice)他们通过雄性不育系 V20A 和多雌蕊 WX154杂交,培育出多雌蕊细胞质雄性 Preface It has been reported that rice has strong heterosis, but low seed production is the biggest challenge in hybrid rice breeding. At present, cytoplasmic male sterile lines have been applied to the seed production of hybrid rice. In order to improve the seed setting rate of cytoplasmic male sterile lines, after cutting the flag leaf, pollination is promoted by spraying “920” and catching the powder. However, outcrossing rates in male sterile lines are still below 30%. Heu and Suh found that the pistillate rice WX154, Suh et al. Identified another pistil-like rice, Double rice. They crossed the male sterile line V20A and the multiple pistil WX154 to produce multiple pistil cytoplasmic male