| 摘要: |
| [目的]拓宽K型杂交小麦保持系资源,克服1B/1R类型K型小麦雄性不育系的缺陷.[方法]对来自莫迦小麦的1BS染色体片段进行细胞学鉴定,并研究将莫迦小麦1BS染色体片段导入1B/1R类型K型小麦雄性不育系后,对其育性、单倍体频率及恢复性的影响.[结果]K Tm3314A含有莫迦小麦的1BS染色体,为非1B/1R类型K型小麦雄性不育系,该类型小麦雄性不育系具有稳定的温敏遗传特性,单倍体频率为0,其平均自交结实率(79.4%)较1B/1R类型K型小麦雄性不育系K D23314A(62.7%)提高16.7%,且有效恢复系(自交结实率大于70%)出现的频率高.[结论]莫迦小麦的1BS染色体片段引入1B/1R类型K型小麦雄性不育系后,使K型小麦雄性不育系具有稳定的温敏遗传特性,其本身和F1代均不产生单倍体,育性更易恢复,恢复源广泛. |
| 关键词: 莫迦小麦 1BS染色体 K型小麦雄性不育系 恢复性 |
| DOI： |
| 分类号:S512.103.51 |
| 基金项目:国家高技术研究发展计划(863计划)? |
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| Effect on wheat CMS lines of Ae. Kotschyi cytoplasm by T. macha var. sub 1BS chromosomal segment transferred |
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SONG Xi-yue HU Yin-gang YU Ling MA Ling-jian LI Hong-bin HE Pei-ru
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| Abstract: |
| 【Objective】 Using heterosis is one of the important ways to improve wheat yield.The study was done to enlarge the maintainer resources of K-type hybrid wheat,and overcome the disadvantages of 1B/1R K-type male sterile line. 【Method】 K Tm3314A，which is a K-type non 1B/1R male sterile line developed from Tm3314 carrying 1BS of T.macha，was Preliminary identified by cytological observation,and haploid percent and fertility-restoring observation was conducted.【Result】 K-type CMS line K-Tm3314A had 1BS chromosome from T.macha var.sub,which was no 1B/1R male sterile wheat line,and had stable photo-temperature sensitivity,no haploid produced,fertility-restoring improved by 16.7 percent，and effective restoring lines（restoring degree was more than 70%）increased. 【Conclusion】 It is easily restored in fertility,produces no haploids in reproduction,and has high temperature sensitivity,thus it is helpful in wheat hybrid breeding. |
| Key words: T.macha var.sub 1BS chromosome K-type wheat male sterile line restorability |
