甘薯种质基腐病抗性鉴定和分析  

Identification and Analysis of Resistance to Foot Rot of Sweetpotato Germplasm

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作  者:刘也楠[1] 黄立飞[2] 何贤彪[1] 刘伟明[3] LIU Yenan;HUANG Lifei;HE Xianbiao;LIU Weiming(Taizhou Academy of Agricultural Sciences,Taizhou 318000,Zhejiang,China;Crop Research Institute,Guangdong Academy of Agricultural Sciences,Guangdong Provincial Key Laboratory of Crops Genetics and Improvement,Guangzhou 510640,China;Taizhou Vocational College of Science and Technology,Taizhou 318020,Zhejiang,China)

机构地区:[1]台州市农业科学研究院,浙江台州318000 [2]广东省农业科学院作物研究所,广东省农作物遗传改良重点实验室,广州510640 [3]台州科技职业学院,浙江台州318020

出  处:《热带亚热带植物学报》2025年第1期33-41,共9页Journal of Tropical and Subtropical Botany

基  金:浙江省农业(粮食)新品种选育重大科技专项(2016C02050-7-3);浙江省农业(旱粮)新品种选育重大科技专项(2021C02064-1);台州市农业类重点科技项目(1701ny12);台州市科技计划项目(23nya01);国家甘薯产业技术体系项目(CARS-10)资助。

摘  要:为探索甘薯基腐病田间抗性鉴定方法和筛选抗病种质,该研究对经过1~3 a试验筛选的81份甘薯(Ipomoea batatas)抗性或其他性状优良的种质进行田间抗病性鉴定,并分析甘薯不同生育时期的病情变化,以及不同抗性等级对鲜薯产量损失率的影响。结果表明,在81份种质中,表现为高抗和抗的种质分别有24和11份。生长期从90到120 d的病情变化明显,尤其是感病种质的4级病级比例迅速提高。鲜薯产量与病情指数呈极显著的负相关(r=-0.9781^(**)),每下降1个抗性等级,鲜薯平均产量损失率将增加19.35%。生长期120 d时发病率与病情指数之间呈极显著正相关(r=0.9925^(**)),除病情指数外,发病率也可作为甘薯基腐病抗性鉴定指标。In order to explore the field resistance identification method of sweet potato(Ipomoea batatas)foot rot and to screen resistant germplasm,a total of 81 germplasms with resistance or other traits were identified after 1-3 years experiment,and the disease changes in different growth stages of sweet potato and the effects of different resistance grades on the yield loss rate of fresh sweet potato were analyzed.The results showed that among the 81 germplasms,24 and 11 were highly resistant and resistant,respectively.From 90 to 120 d of growth stage,the disease changed obviously,especially the proportion of grade 4 disease of the susceptible species increased rapidly.There was a significant negative correlation between fresh potato yield and disease index(r=-0.9781^(**)),and the average yield loss rate of fresh potato increased by 19.35%for each resistance grade decrease.At 120 d of growth stage,there was a significant positive correlation between incidence and disease index(r=0.9925^(**)).Therefore,in addition to disease index,incidence could also be used as an index to identify resistance to foot rot of sweet potato.

关 键 词:甘薯基腐病 种质 抗性 发病率 病情指数 

分 类 号:S435.31[农业科学—农业昆虫与害虫防治]

 

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