摘要
由肿囊腐霉菌(Pythium inflatum Matthews)引起的玉米茎腐病是影响玉米产量的一种重要病害。为进一步拓展可利用的抗源,于2010-2011年在田间采用人工接种方法对287份重要的玉米自交系种质进行了玉米茎腐病的抗性鉴定评价。结果表明,287份鉴定材料中有171份自交系对茎腐病的抗性达到中抗以上水平,占鉴定材料的59.58%,其中高抗自交系共43份,占鉴定材料总数的14.98%;感病类型自交系共116份,占鉴定材料的40.42%,其中高感自交系共95份,占鉴定材料总数的33.10%。Lancaster、Reid及P群种质中具有丰富的茎腐病抗源,而塘四平头种质群中茎腐病抗源相对缺乏,多为感病类型。该研究结果可为今后我国玉米茎腐病抗性种质的引进和改良提供重要参考。
Resistance to stalk rot caused by Pythium inflatum Matthews is an important trait for maize breeding.To identify effective resistant germplasm,totally 287 inbred lines representing most of the genetic diversity of Chinese maize inbred germplasm were evaluated for stalk rot resistance during 2010-2011.The results showed that 171 maize inbreds were resistant to stalk rot,among which 43 inbreds were highly resistant to stalk rot,accounting for 14.98%.And 116 maize inbreds were stalk rot sensitive,among which 95 inbreds were highly sensitive to stalk rot,accounting for 33.10%.Lancaster,Reid and P genetic groups were identified to be important sources for maize stalk rot resistance.The results provided useful information for the introduction of maize germplasm and genetic improvement for resistance to stalk rot in the future.
出处
《植物遗传资源学报》
CAS
CSCD
北大核心
2012年第5期798-802,共5页
Journal of Plant Genetic Resources
基金
"973"项目(2011CB100100
2009CB118400)
农业部保种专项(NB06-070401)
关键词
玉米
自交系
茎腐病
抗性鉴定评价
Maize
Inbred line
Stalk rot
Resistance identification and evaluation
