摘要
以(崇阳红麦×恩鄂一号)幼胚培养获得的再生植株(第二代)为材料,通过接种鉴定,获得了对赤霉病抗侵入和高度抗扩展类型的植株。抗侵入类型的表现是接种小花不发病或出现过敏性坏死而小花脱落。高度抗扩展类型的表现是仅接种小花病而不扩展至相邻的同小穗小花。这就为抗赤霉病育种提供了形态特征和有关遗传信息,根据试验结果,对抗侵入的概念、反应级划分抗赤霉病育种目标及组织培养可作为创造新抗源的有效诱变因素等方面进行了讨论。
Wheat ear inoculation with scab was made in more than 900 R2 regenerated plants, derived from cultures of immature embryos of Chong-Yang-Hong-Mai X Een No.1. Altogether, 1.88% individuals of resistance to invasion and high resistance to expansion type was isolated.These isolates could be divided into three typeS:Type 1-inoculated florets not showing infection ( in 0.33% inoculated plants) . Type 2-inoculated florets showing necrosis and abscission ( in 0.45% inoculated plants). Type 3-inoculated florets showing infection, but not expanded to neighbouring florets in the same spikelet ( in 1.1% inoculated plants) . Type 1 and 2 were resistant to invasion and type 3 was highly resistant to expansion. These results supplied morphological characters and genetic information for scad resistance breeding. The concept of resistance to invasion, classification of reaction degree, goal for scab resistance breeding and establishment of new scab resistance source were discussed.
出处
《华中农业大学学报》
CAS
CSCD
北大核心
1989年第3期195-200,共6页
Journal of Huazhong Agricultural University
基金
农业部农02重点课题
国家自然科学基金
关键词
小麦
赤霉病
抗性
反应型
抗侵入
wheat
scab resistance
reaction pattern
invasion resistance
expansion resistance
