青岛地区不同紫花苜蓿品种对蚜虫的田间抗性评价

目的]明确不同苜蓿品种对蚜虫的抗性。方法]在青岛地区采用蚜情指数法对来自国内外的32个苜蓿品种进行了田间抗蚜性评价。结果]蚜情指数法所确定的不同抗性品种的结果能够较好地体现出品种之间的抗性。将32个品种对蚜虫的抗性分为5类,即南澳、Baralfa 421Q、TG4 CW044026、新牧2号、无名4、Bar003 A12-3136F12、天山苜蓿、WL319HQ和Baralfa 321Q为高感品种;无名3、WL525Q、新牧1号、加拿大为感蚜品种;赛迪10、甘农4号、TG3(CW0530)、敖汉苜蓿、三得利、WL323、无名2和WL343为中抗品种;赛特、Millionaire、5S43、甘农1号、公农1号、无名1、TG7 CW2883、三得菲和中牧3号为抗性品种;而WL363HQ和Brarlfa 53HQ为高抗品种。结论]该研究初步筛选出以WL363HQ和Brarlfa 53HQ为主、适合在青岛地区种植、具有抗蚜性的19个抗性品种,为科学利用优质苜蓿种质资源提供了理论依据。

Evalua tion of Resistance of Medicago sativa Varieties to Aphids inQingdao

Objective] The aim was to clear the resistance of alfalfa varieties to aphids.Method]The resistance evaluation was conducted with 32 alfalfa varieties in Qingdao by the methods of aphid index. Result]The results showed that determining the resistance of different varieties of the result was reliable by the method of aphid index,and could reflected the resistance between the varieties.Resistance of the 32species of alfalfa to aphid into five classes,and the Aurora,Baralfa 421Q,TG4 CW044026,Xinmu No.2,Wuming No.4,Bar003 A12-3136F12,Tianshan Alfalfa, WL319HQ and Baralfa 321Q were highly susceptible variety .There were 4 susceptible varieties,like Wuming No.3,WL525Q,Xinmu No.1,Cana-da.The 8 species of alfalfa,like Sadie 10,Gannong No.4,TG3 (CW0530),Aohan Alfalfa,Sandeli,WL323,Wuming No.2 and WL343,had certain moderate resistance to aphid.There were 9 resistance varieties,like Sitel,Millionaire (Canada),5S43 (America),Gannong No.1,Gongnong No. 1,Wuming No.1,TG7 CW2883,Sandifi,Zhongmu No.3.Nevertheless,the WL363HQ and Brarlfa 53HQ were highly resistance varieties.Conclu-sion] A total of 19 species of alfalfa with resistance to aphid are screened out in Qingdao,among them the WL363HQ and Brarlfa 53HQ are main varieties.This study provides theoretical basis for the scientific utilization of high quality alfalfa germplasm resources.