黄瓜霜霉病苗期与成株期抗性相关分析.pdfVIP

安徽农业科学。Journal ofAnhui ngi．Sci．2O08。36(16)：6837—6838。684O 责任编辑 金琼琼 责任校对 马君叶 黄瓜霜霉病苗期与成株期抗性相关分析 白智龙，周鸿飞 (沈阳农业大学，辽宁沈阳l1ol61) 摘要 [目的]为高抗霜霉病黄瓜品系的选育奠定基础。[方法]以自交系$94和S06及其构建的224个 重组群体为材料，研究黄瓜苗 期人工接种病情指数和成株期田问自然发病病情指数的相关性。[结果]苗期出现病斑较多的家系，成株期感病情况更为严重。通过抗 性鉴定，获得17份抗病家系和16份感病家系。春、秋季苗期人工接种的病情指数与成株期自然发病的病情指数均达到极显著水平，呈 正相关。因此，可利用苗期人工喷雾接种的辅助手段对黄瓜群体进行快速鉴定，谇价其霜霉病抗性，筛选出优良的抗性资源，从而缩短 育种周期。[结论]适宜条件下，利用苗期人工接种可快速鉴定出黄瓜群体中抗霜霉病的材料。 关键词 黄瓜霜霉病；抗性；相关性分析 中图分类号 $436．421．1 1 文献标识码 A 文章编号 0517—6611(zoos)16—06837—02 Correlation Analysis on the Resistance to Downy 1Vnldew in( aⅡIlber between seetmng Stage and Adult Plant Stage BAI：~fi-iong et al (Shenyang Agricultural University，Shenyang，Liaoning 110161) Abstract {Objective J 111e research aireed to 廿1e foundation forthe breeding of cuctll~r lines with high resistance to downy mildew．{Methodl witl1 inbred lines S94 and S06 and their constructed recombinant population as tested materials the correlation between artificial inoculation disease index of eu— OJlTlber in~ Uing stage and natural disease index in field in adult plant stage was smdied．1Reset J 111e lines that had 131tore disease spot in soedling stage could infect disease more seriously in aduh plant stage．Through the resistance identification，17 resistant lines and 16 susceptible lines were obtained． Both the artifieial iHOCHlation disease index in seedling stage in sprlng and sllnlnler and the natural disease index in adult stage reached the extremely sig． n~eant level and they showed a positive COITelation． I cuctll~ r populations could be quic~y identitled by using the assistant means of artifieial spmy— ing ineculation in seedling stsge． I1leir resistance to downy mi1dew was evaluated and excellent resistant resollrces were screened out SO aS to shorten the breeding period．1Conclusionj Under suitable conditions，the resistant materlals to downy mildew iii cumber population could be quickly identit]ed by US— i