不同品种(系)烟草普通花叶病(TMV)的抗病性鉴定

【目的】筛选地方性优质抗烟草普通花叶病(TMV)烟草种质,为湘中北烤烟抗TMV育种提供优良的种质资源。【方法】采用苗期温室病圃人工接种诱发方法结合大田病圃鉴定,以Coker176为抗病对照、革新3号为中抗对照、G140为感病对照,对9625、金星6007、小黄金0019、401-2、小黄金1025、NGLAUCA、延烟2号等18个烤烟品种(系)进行TMV抗病性鉴定。【结果】在供试品种(系)中,筛选出抗病品种(系)2个,分别为T61和9625,占供试品种(系)总数的11.1%;中抗品种5个,分别为金星6007、03-4-3、胎里黄1061、VESTA33和云烟98,占27.8%;感病品种(系)11个,分别为小黄金0019、401-2、311、小黄金1025、NGLAUCA、延烟2号、大白筋0522、沪金3号、大叶永烟、长脖黄和NC95,占61.1%。【结论】筛选出T61和9625两个抗TMV烤烟品种,可作为湘中北地区抗TMV育种的重要种质资源;同时可在湘中北地区进行T61和9625的示范性推广种植。

Identification of different tobacco varieties(lines) resistance to tobacco mosaic virus

Objective]The present study was conducted to select local superior tobacco varieties(lines) that were re-sistant to tobacco mosaic virus(TMV) in order to provide well-refined seed varieties for flue-cured tobacco resistant to TMV in central and northern part of Hunan. Method]Method of artificial inoculation and inducement in greenhouse dis-ease nursery combined with identification in diseased field was adopted in the research. Taking Coker176 as disease resis-tance control, Gexin 3 as moderate disease resistance control, and G140 as disease susceptibility control, TMV resistance identification was conducted on 18 flue-cured tobacco varieties, such as 9625, Jinxing 6007, Xiaohuangjin 0019, 401-2, Xiaohuangjin 1025, NGLAUCA,Yanyan 2, etc. Result]In the tested varieties (lines), two selected varieties (lines) resistant to TMV were T61 and 9625, accounted for 11.1% of total varieties; five varieties moderately resistant to TMV were Jinxing 6007, 03-4-3, Tailihuang 1061, VZSTA33 and Yunyan 98, occupying 27.8% of the total varieties; eleven susceptible varieties(lines) Xiaohuangjin 0019, 401-2,311,Xiaohuangjin 1025,NGLAUCA,Yanyan 2,Dabaijin 0522, Hujin 3,Dayeyongyan,Changbohuang, NC9, accounted for 61.1%of the total. Conclusion]The selected two varieties that are resistant to TMV, T61 and 9625, are important TMV-resistant germplasm resources in central and northern part of Hunan. In addition, demonstration planting of these two varieties can be promoted in the region.