小白菜种质资源对小菜蛾的抗性评价

本文就小白菜种质资源对小菜蛾的抗性进行室内鉴定,结果表明268份材料的虫害指数分布在18.10～100.00之间,种质资源间抗虫性差异达到显著水平.聚类分析将268份种质资源分为6大类,与高抗、抗、中抗、中感、感、高感相对应,其中筛选出高抗和抗性材料分别为6和11份.对268份材料的主要形态性状与虫害指数和抗性级别的相关分析表明,小白菜种质资源叶面的皱缩度与抗虫性存在一定的相关性,认为从叶面平滑型的种质资源中筛选抗虫性材料的可能性更大.

Identification of Resistance of Brassica campestris L.ssp. chinensis Germplasm Resources to Plutella xylostella

Identification of resistance of Brassica campestris L. ssp. chinensis germplasm resources to Plutella xylostella was conducted by artificial inoculation in the greenhouse. The result showed that pest index ranged between 18.10- 100.00 accessions resistance were significantly different and classified into six, corresponding HR, R,MR,MS, S, HS. Among them, six accessions behaved highly resistant and eleven resistant to Plutella xylostella. The result also indicated that the resistance of materials to Plutella xylostella was significantly related to crinkle of leaf surface. Smooth leaf surface accessions was most potential for selecting resistant materials.