甘蓝黑腐病苗期抗病性鉴定

Studies on Identifying Resistance to Blackrot of Cabbage in Seedling Stage

以"京丰"、"庆丰"和"铁头"3个生产上的主干甘蓝品种为对照,对5个新育成的甘蓝新组合("010号"、"011号"、"012号"、"013号"和"014号")进行苗期"甘蓝黑腐病(Cabbage black rot)"病原菌的接种处理,调查其病情指数,并进行抗病性鉴定和分级。结果表明:3个对照品种中"铁头"表现为"抗病","京丰"表现为"耐病","庆丰"则表现为"感病"。5份甘蓝新组合材料中,"014号"表现为"高抗","010号"和"012号"组合表现为"抗病","011号"和"013号"组合表现为"耐病",5个新育成的甘蓝组合的抗病性虽然有一定的差异,但均超过了对照品种"庆丰",而且抗病性差异达到了极显著水平。

This experiment studied the resistance to cabbage Blackrot （Xanthornonas campestris pv. Campestris） in seedling stages. The identification method for resistance of Blackrot of cabbage in seedling stage. The leading cultivars in the cabbage production i.e. ＇Jingfeng＇, ＇Qingfeng＇, ＇Tietou＇ were chosen as controls and five new combinations i.e. ＇NO. 010＇ , ＇NO. 011＇ , ＇NO. 012＇, ＇NO. 013＇ , ＇NO. 014＇ were used as treatments. The eight cuhivars or combinations were inoculated with pathogenic bacterium and their disease index was investigated to identify the resistance to cabbage blackrot and classify. The results showed as followed. It was found that ＇Tietou＇ showed Resistant, ＇Jingfeng＇ showed Toler- ant and Qingfeng showed susceptible. ＇NO. 014＇ showed high resistant. Both ＇NO. 010＇ and ＇NO. 012＇ showed resistant and their resistance was in the same grade of ＇Tietou＇. Both ＇NO. 011＇ and ＇NO. 013＇ showed Tolerant. The resistance of five new cabbage combinations had certain difference but they all showed significant higher resistance than the control ＇ Qingfeng＇.