遗传 ›› 1995, Vol. 17 ›› Issue (6): 12-16.

• 论文 • 上一篇    下一篇

小麦提型不育系和杂交种种子生活力遗传改良初探

李有春 LI You-Chun   

  1. 广东省湛江农业高等专科学校, 湛江 524088 Zhanjiang Agricultural College,Zhanjiang,Guangdong 524088
  • 收稿日期:1900-01-01 出版日期:1995-12-10 发布日期:1995-12-10

The Genetic Improvement on Seed Viability of A-line and Hybridin Wheat with T.timopheevi Cytoplasm

  • Received:1900-01-01 Online:1995-12-10 Published:1995-12-10

摘要: 本试验共选用了4个提型不育系(A系)及其保持系(B系)、4个恢复系(R系)及其川7B/R4份F~1|代材料,用不同遗传背景的B、R系及川7B/R材料与A系杂交,种子成熟时收获干燥考种,度过休眠期后进行发芽试验。结果表明,父本对F~0|种子千粒重存在胚乳直感现象;川3A、川4A与其它B系杂交,其F~0|种子的千粒重、饱满度、发芽率和发芽势均有不同程度的提高;川4A×R和川6A×R的杂种种子千粒重多分别比川4A×川7B/R和川6A×川7B/R的高,但前种组合(A×R)的种子发芽和发芽率远不如后一种组合(A×川7B /R)的种子,且前种组合的穗发芽率也较高。作者认为,利用A系与农艺性状相近、但遗传背景各异的B系杂交,或在R系中输入抗提型细胞质负影响的高种子生活力基因, 是提高A系和杂交种种子生活力的值得注意的途径。
Abstract:The objective of this paper is trying to grope for ways of improving sced viability of A-line and hybrid in wheat with T.timopheevi cytoplasm.Four A lines and their B lines,4 restorers (R line) and 4 crosses of Chuan 7B/R were used.The combinations of A×B,A×R and A×Chuan 7B/R were madc,and 1 000-grain weight (GW),rate of pre-harvest sprouting(RPHS),germinating energy(GE) and germination percentage (GP) of their F0 seeds were investigated.The results showed that the GW,full weight,GE and GP of the seeds of Chuan 3A and 4A×other B lines were higher than those of Chuan 3A×3B and chuan 4A×4B;although the GW of Chuan 4A and 6A×R were heavier than those of Chuan 4A and 6A×Chuan 7B/R,the GE and GP of the latter crosses increased largely and their RPHScs were less.Therefore,it was considered as effective ways for improvement on seed viability,that A lines cross with other B lines having different genetic background but similar agronomic characters and that the gene(s) concerning high seed viability were transferred into restorers.

关键词: 穗发芽率, 种子生活力, 遗传改良
Key words,
小麦, 提型A系和杂交种, R型育性回复突变, 恢复基因近等基因系, 水稻, 细胞质雄性不育性, 遗传分析

Key words: R type fertility reversion, Cytoplasmic male sterility(CMS), Genetic analysis, Near isogenic lines of restoring gene, Rice