Biological and molecular characterization of Zucchini yellow mosaic virus isolates infecting melon in Xinjiang, China

被引:5
作者
Wang, Dong [1 ]
Li, Guan [1 ]
机构
[1] Xinjiang Univ, Coll Life Sci & Technol, Urumqi 830046, Xinjiang, Peoples R China
基金
中国国家自然科学基金;
关键词
host reaction; melon; pathotype; phylogenetic group; Zucchini yellow mosaic virus; groupe phylogenetique; reaction de l'hote; virus de la mosaique jaune de la courgette; COAT PROTEIN; SEROLOGICAL VARIABILITY; POTYVIRUS; RESISTANCE; TRANSMISSION; EVOLUTION; ZYMV; EPIDEMIOLOGY; LOCALIZATION; INHERITANCE;
D O I
10.1080/07060661.2017.1285356
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Zucchini yellow mosaic virus (ZYMV) causes one of the most destructive diseases of cucurbits worldwide. Although the virus has been present in China for more than 25years, there is little information about biological and molecular traits of ZYMV isolates from China. This study aimed to characterize 26 ZYMV isolates from Xinjiang, China based on pathotypes, molecular variability and host range. Phylogenetic analysis of the complete sequences of the coat protein gene revealed three distinct groups (A, B and C), with four subgroups in A (I-IV). All isolates from Xinjiang were placed in group C and subgroups A-I and A-II. To test for differences in host range among different phylogenetic groups from Xinjiang, 13 isolates were mechanically inoculated onto 14 plant species in five families and their pathotypes were also identified based on the reaction of a resistant melon accession PI414723. Overall, the results showed that there were no correlations of host responses to inoculation with ZYMV isolates from different phylogenetic groups. However, on Cucurbita pepo, differences in host responses to inoculation with the ZYMV isolates from different phylogenetic groups were observed. Although the host range of the 13 isolates tested was similar, their biological properties on different hosts were slightly different from the ZYMV isolates characterized in other countries. The results of the pathotype test showed that the 13 ZYMV isolates were classified as pathotype 0. The information obtained is important in breeding for resistant varieties. ResumeLe virus de la mosaique jaune de la courgette (VMJC) cause une des maladies les plus destructrices chez les cucurbitacees, et ce, a l'echelle de la planete. Bien que le VMJC soit apparu en Chine il y a plus de 25 ans, nous possedons peud'information sur les caracteres biologiques et moleculaires de sesisolats. Cette etude visait a caracteriser 26 isolats de VMJC provenant de la province du Xinjiang, en Chine, en se basantsur les pathotypes, la variabilite moleculaire et la gamme de plantes hotes. L'analyse phylogenetique des sequences completes du gene de la proteine capsidiaire a revele trois groupes (A, B et C), dont quatre sous-groupes chez A (I-IV). Tous les isolats du Xinjiang ont ete places dans le groupe C et les sous-groupes A-I et A-II. Afin de tester les differences quant a la gamme de plantes hotes parmi divers groupes phylogenetiques provenant du Xinjiang, 14 especes de plantes de 5 familles ont ete inoculees mecaniquement avec 13 isolats, et leurs pathotypes ont egalement ete identifies en se basant sur la reaction de l'obtention PI414723 d'un melon resistant. En general, les resultats ont montre qu'il n'y a pas de correlation entre les reactions de l'hote et l'inoculation avec les isolats de VMJC provenant de differents groupes phylogenetiques. Toutefois, nous avons observe, sur Cucurbitapepo, des differences quant a la reaction de l'hote a l'inoculation avec des isolats de VMJC provenant de differents groupes phylogenetiques. Bien que la gamme de plantes hotes des 13 isolats testes fut similaire, leurs proprietes biologiques quant a divers hotes differaient legerement des isolats de VMJC caracterises dans d'autres pays. Les resultats des tests effectues sur les pathotypes ont montre que les 13 isolats de VMJC etaient classifies en tant que pathotype 0. L'information obtenue est importante pour la selection de varietes resistantes.
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页码:48 / 59
页数:12
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