| 不同木薯品种对朱砂叶螨抗性分析 |
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| 引用本文： | 韦婉羚,罗兴录,王天亮,周信良,吴昊.不同木薯品种对朱砂叶螨抗性分析[J].南方农业学报,2017,48(12):2182-2189. |
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| 作者姓名： | 韦婉羚 罗兴录 王天亮 周信良 吴昊 |
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| 作者单位： | 广西大学 农学院,南宁,530004广西大学 农学院,南宁530004亚热带农业生物资源保护与利用国家重点实验室,南宁530004 |
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| 基金项目： | 广西科学研究技术开发计划项目国家现代农业产业技术体系广西薯类产业创新团队项目南宁市科学研究技术开发计划项目亚热带农业生物资源保护与利用国家重点实验室开放基金项目 |
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| 摘 要： | 目的]明确不同木薯品种对朱砂叶螨的抗性,为推广综合性状好、产量高、抗螨性强的木薯品种提供理论依据.方法]以6个木薯品种(新选048、华南205、华南8号、桂热4号、D346和F50)为试验材料,于朱砂叶螨第1次危害高峰期调查不同木薯品种受朱砂叶螨危害程度,并对其抗螨性进行鉴定;测定不同木薯品种的叶片营养成分及叶片形态特征,分析不同指标与朱砂叶螨危害程度的关系,探讨木薯对朱砂叶螨的抗性机制;在木薯收获期对6个木薯品种的产量及相关性状进行比较分析,推选综合性状好、产量高、抗螨性强的品种.结果]新选048、D346和F50为MR级别,螨害指数为56.11%~61.41%;华南8号、华南205和桂热4号为S级别,螨害指数为74.26%~84.07%.木薯的螨害指数与叶片可溶性糖、可溶性蛋白、脯氨酸含量和水含率、叶片厚度间呈显著正相关(P<0.05),与游离氨基酸总量间呈极显著正相关(P<0.01),而与SPAD值、叶片蜡质含量、最大裂叶长和最大裂叶宽间相关性不显著(P>0.05,下同).木薯品种的螨害指数与块根产量及相关性状间均呈负相关,但相关性均不显著.结论]新选048对朱砂叶螨的抗性最强、产量相关性状较好、产量最高,可在朱砂叶螨高发区推广种植.可溶性糖、可溶性蛋白、脯氨酸、游离氨基酸含量、水含率和叶片厚度等可作为木薯朱砂叶螨抗性的重要鉴定指标.
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| 关 键 词： | 木薯 朱砂叶螨 抗性 产量 |
Resistance of different cassava varieties to Tetranychus Cinnabarinus |
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| WEI Wan-ling,LUO Xing-Lu,WANG Tian-liang,ZHOU Xin-liang,WU Hao.Resistance of different cassava varieties to Tetranychus Cinnabarinus[J].Journal of Southern Agriculture,2017,48(12):2182-2189. |
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| Authors: | WEI Wan-ling LUO Xing-Lu WANG Tian-liang ZHOU Xin-liang WU Hao |
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| Abstract: | Objective]Resistance of different cassava varieties to Tetranychus cinnabarinus was studied to provide reference for promoting cassava varieties with fine comprehensive traits,high yield and strong mite resistance.Method]Six cassava varieties(XX048,SC205,SC8,GR4,D346 and F50)were taken as the materials.The damage degrees of different cassava varieties at the first T.cinnabarinus hazard peak were investigated and their mite resistances were also de-tected.Nutrient components in leaves of different cassava varieties and their leaf morphological characters were determi-nated,and the relations between each index and mite damage degree were analyzed to investigate resistance mechanism of cassava to T.cinnabarinus.During the harvest stage,yields and related traits of six cassava varieties to select the ones with fine comprehensive traits,high yield and strong mite resistance.Result]Results of the trial indicated that XX048, D346 and F50 were moderate resistant(MR)varieties with mite resistance index being 56.11%-61.41%,SC8,SC205 and GR4 were susceptible(S)varieties with mite resistance index being 74.26%-84.07%.Mite damage indexes had significant positive correlation(P<0.05)with soluble sugar content,protein content,proline content,soluble,water content and leaf thickness.Besides,the indexes had extremely significant positive correlation with free amino acids content(P<0.01).But the relations between mites damage indexes and SPAD,wax content,length of the biggest lobed leaf and width of the big-gest lobed leaf were not significant(P>0.05,the same below).Mite damage indexes had negative correlation with yield and related traits,but the correlation was not significant.Conclusion]Among the six varieties,XX048 has the strongest mite resistance,its yield related traits are fine,and the yield is the highest among them all.Therefore,it can be promoted in planting areas where T.cinnabarinus hazards occur frequently.Soluble sugar,soluble protein,proline,water content,free amino acids and leaf thickness can be used as important identification index for the resistance of cassava to T.cinnabarinus. |
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