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The occurrence of two species of pineapple mealybugs (Dysmicoccus spp.) (Hemiptera: Pseudococcidae) in China and their genetic relationship based on rDNA ITS sequences

文献类型： 外文期刊

作者： He, Yan-biao 1 ; Liu, Ying-hong 3 ; Zhan, Ru-lin 1 ; Xu, Zai-fu; Sun, Guang-ming 1 ; Zhao, Yan-long 1 ; Li, Guo-pin 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Ctr Pineapple Germplasm Innovat & Utilizat Hainan, South Subtrop Crops Res Inst, Zhanjiang, Peoples R China

2.Southwest Univ, Coll Plant Protect, Chongqing Key Lab Entomol & Insect Control Engn, Chongqing, Peoples R China

3.Southwest Univ, Coll Plant Protect, Chongqing Key Lab Entomol & Insect Control Engn, Chongqing,

关键词： pineapple mealybug;molecular phylogenetics;cryptic speciation;rDNA ITS

期刊名称：CARYOLOGIA （ 影响因子：0.918； 五年影响因子：0.846 ）

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收录情况： SCI

摘要： To explore the composition, distribution and interrelation of the pineapple mealybugs in China, samples were collec from 14 counties of five provinces. The genetic variations of pineapple mealybugs from China, Brazil and Hawaii of USA have been analyzed. The whole ribosomal internal transcribed spacer 1 (ITS1), 5.8S and ribosomal internal transcribed spacer 2 (ITS2) were sequenced for all samples. Pink pineapple mealybug (PPM), Dysmicoccus brevipes (Cockerell) and gray pineapple mealybug (GPM), Dysmicoccus neobrevipes Beardsley are found causing damage on Ananas comosus (L.) Merr. PPM is a predominant species of mealybug on A. comosus in China. Though GPM has wider host range in China, PPM has larger distribution area than GPM. The results showed that two pineapple mealybug species belong to two different clades based on the sequences of ITS. PPM from China was found to have four haplotypes, and GPM had two haplotypes. The genetic variation of PPM is greater than that of GPM, though both of them had one predominant haplotype. One haplotype of PPM was found in samples from mainland China, and three from Hainan Island. Another haplotype of PPM was observed among the samples from Brazil and Hawaii. However, mealybugs from Wanning City of Hainan Island in China represented a different lineage that clearly diverged from other populations, which would be of a cryptic lineage or species in the pink pineapple mealybug complex. Mealybugs from Wanning City are probably native and were present long before the exotic pink pineapple mealybug was introduced in the early twentieth century. Most GPM, represented by a predominant haplotype, was widely found on sisal in plantations in south China. Other GPM, often found on sisal in urban green belt in south China, was of different haplotype from samples on sisal in plantations, probably originating from Taiwan.

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[1]MITOCHONDRIAL COI FROM DYSMICOCCUS BREVIPES (HEMIPTERA: PSEUDOCOCCIDAE) SUGGESTS CRYPTIC LINEAGE AND PINPOINTS THE SOURCE OF THE INTRODUCTION TO CHINA. He, Yan Biao,Wan, Xuan Wu,Liu, Yin Hong,He, Yan Biao,Sun, Guang Ming,Zhan, Ru Lin. 2012

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