摘要
为确定现有种质资源的抗病性,通过对119份烟草种质资源后期的烟杈TMV发病情况调查结果与TMV抗性鉴定结果比较看出,抗性鉴定为抗TMV的34份种质的烟杈病株率和病指分别为66.25%和23.93;鉴定为中抗的20份种质的烟杈病株率和病指分别为73.98%和26.29;鉴定为中感TMV的16份种质的烟杈病株率和病指分别为74.45%和28.43;鉴定为感TMV的5份种质烟杈病株率和病指分别为80.66%和33.56。即烟杈TMV发病情况与抗病性鉴定结果有一定的规律性。从某种意义上来说,烟杈TMV的病株率和病指可作为该种质资源对TMV抗性水平的参考值,尤其是在不具备开展TMV人工接种鉴定的情况下,烟杈TMV发病情况基本能反映种质资源对TMV的抗性水平。该法可用于抗TMV烟草种质资源的初步筛选。
This paper focused on evaluation of TMV incidence of the branches and the results of disease resistance identification for 119 tobacco germplasm resources.As for 34 resistance TMV identification,the rate and index of the incidence of the branches were 66.25% and 23.93 respectively;20 mid-resistance TMV identification had the rate and index of the incidence of the branches with 73.98% and 26.29 respectively;16 mid-susceptible TMV had the rate and index of the incidence of the branches with 74.45% and 28.43 respectively;5 susceptible TMV had the rate and index of the incidence of the branches with 80.66% and 33.56 respectively.The results showed that there exited a certain regularity between the TMV resistance identification and TMV incidence of the branches for tobacco germplasm resources.In a sense,TMV incidence of branches can be used as the reference value for TMV resistance level.Particularly in the absence of artificial inoculation to TMV resistance identification,screening of the disease resistance can reveal TMV resistance level,and the proposed method can be applied to the preliminary screening for TMV resistance tobacco germplasm resources.
出处
《中国农学通报》
CSCD
北大核心
2010年第22期287-291,共5页
Chinese Agricultural Science Bulletin
基金
云南省烟草公司项目"烟草种质资源鉴定评价及<烟草种质资源图鉴>编写"(04A20)
关键词
烟草种质资源
烟杈
抗病性鉴定
TMV病株率
人工接种
tobacco germplasm resources
branches of tobacco
disease resistance identification
TMV incidence
artificial inoculation
