几类异质非1BL/1RS小麦雄性不育系微效恢复基因累加效应的研究

Studies on accumulating effect of restoring genes of some alloplasmic non-1BL/1RS male sterile lines in wheat

为揭示非1BL/1RS小麦雄性不育系的恢复性遗传规律,特别是对恢复系的创制,以具有粘型、易型和偏型等细胞质的非1BL/1RS小麦雄性不育系,及对其有一定恢复力的小麦品种(系)132、83-3等为基础材料,以01-3-6为工具材料,采用特殊复合杂交法研究了这几类异质非1BL/1RS小麦雄性不育系微效恢复基因的累加效应。结果表明,以国际法表示时,不同核型材料中的粘型、偏型非1BL/1RS小麦雄性不育微效恢复基因均存在显著的累加效应,且在累加高代表现较为明显,以国内法表示时,则没有累加效应;不同核型材料对易型非1BL/1RS小麦雄性不育系育性恢复没有明显的规律性,以国内法计算的恢复度世代间变化幅度明显低于国际法;粘型、偏型非1BL/1RS小麦雄性不育系杂种F1产量的形成以小穗中部小花结实为主。

The studies focus on the accumulating effect of the restoring gene of several alloplasmic non- 1BL/1RS male sterile lines in wheat by special complex hybridization. Three non-1BL/1RS male sterile lines possessing the cytoplasm of Ae. kotschyi ,Ae. variabilis,Ae, ventricosa and several good cultivars 132, 83-3 ,etc. ,which to some extent have restoring ability to the tree male sterile lines mentioned above,have been used as basic material and the 01-3-6 as tool material. The results are as follows：on the whole,the restoring genes for the non-1BL/1RS male sterile lines of K and Ven type in different nuclei type material have significant accumulating effect by international method especially in high generations, in comparison with Xiaoyan 6 ; but the restoring genes have no accumulating effect by domestic methods. As for the fertility restoring performance for the non-1BL/1RS male sterile lines of V type, seed setting rate has no orderliness in different generations and the changing range of seed setting rate by domestic method is lower than the one by international method. The F1 yield of K and Ven type non-1BL/1RS male sterile lines mainly comes from the middle flowerlet of spikelet.