摘要
研究了含不同黑麦抗性基因的材料在小麦抗条锈病实际育种中的表现.在含不同来源的黑麦抗性基因的杂交F7以上高代株系群体中,11.68%～18.69%表现免疫或者高抗的材料在1年内就丧失了抗性;69.40%～81.07%的材料仍然保持了较好的抗性.而一些中抗材料却表现出了相对持久的抗性,表现了慢锈性的特征.这些结果证明了来源于黑麦的抗条锈病基因的多样性,同样可以表现为垂直抗性、水平抗性和慢锈性.此外,在调查中发现,F7及其更高世代仍有较多株系的抗病性在发生分离.本研究指出,在小麦抗条锈病育种中,垂直抗性基因和慢锈性基因的集合对延长新品种寿命有重要意义,在高世代株系中的进一步选择有利于实现这个目标.
Thousands of wheat advanced lines originated from hybrids between wheat （ Triticurn aestivum L. ） and rye （ Secale cereale L. ） different varieties were investigated for stripe rust resistance in 2003 and 2004. The results show that many lines were immune or high-resistant to stripe rust, and exhibit excellent agronomic characters. Some lines which were immune or high-resistant to stripe rust in 2003 lost their resistance in 2004, while other immune-, high-or medium-resistant lines exhibited lasting resistance to stripe rust. The results suggest that the resistance to stripe rust originated from rye can behave with a diversity of vertical and horizontal resistance as well as slow-rusting as those resistant genes from wheat. In addition, it is found that there also exists segregation of resistance in F7 and even later generations. For this reason it is necessary to continuously select in the advanced generation in wheat breeding for resistance to stripe rust.
出处
《四川农业大学学报》
CSCD
2005年第4期379-382,共4页
Journal of Sichuan Agricultural University
基金
四川省教育厅攻关资助课题
四川省小麦育种攻关资助课题
关键词
小麦育种
黑麦
条锈病
慢锈性
wheat breeding
rye
wheat stripe rust
slow-rusting
