|Table of Contents|

Evaluation of Pathogenicity of Root-knot Nematodes and Disease Resistance in Different Pepper Varieties in Inner Mongolia

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2026年10
Page:
80-87
Research Field:
Publishing date:

Info

Title:
Evaluation of Pathogenicity of Root-knot Nematodes and Disease Resistance in Different Pepper Varieties in Inner Mongolia
Author(s):
XU Jia1; WANG Yanchun1; GUO Jingyu1; XI Xianmei2; GAO Wa3; SHI Xue4
(1.Chifeng Academy of Agriculture and Animal Husbandry Sciences,Chifeng,Inner Mongolia 024031;2.Inner Mongolia Academy of Agriculture and Husbandry,Hohhot,Inner Mongolia 010031;3.Baotou Agricultural and Animal Husbandry Sciences Research Institute,Baotou,Inner Mongolia 014040;4.Tongliao Agricultural and Animal Husbandry Development Center,Tongliao,Inner Mongolia 028000)
Keywords:
root-knot nematode; geographical population; pathogenicity; pepper; disease resistance
PACS:
S641.3
DOI:
10.11937/bfyy.20260149
Abstract:
Taking the Meloidogyne incognita populations isolated from soil samples collected from high-incidence areas of root-knot nematode diseases in Chifeng,Baotou,Hohhot,and Tongliao in Inner Mongolia as test materials,a pot identification method was adopted to conduct experiments on cucumber physiological indicators and host root responses.The study investigated the effects of M.incognita populations from different geographical origins on cucumber growth and development,established an evaluation system,and further evaluated the disease resistance of 36 pepper germplasms using a combination of pot and field experiments,in order to provide a reference for the breeding of pepper varieties resistant to root-knot nematodes.The results showed that,1) pathogenicity varied significantly among different geographical populations,with the BT population being the most virulent.After inoculation,cucumber root length,root surface area,and root volume decreased by 87.8%,86.5%,and 83.4%,respectively,and the disease index reached 87.407;2) the disease index showed a highly significant negative correlation (P＜0.01) with total root length,root surface area,root volume,and fresh root weight,indicating that these root traits,together with the disease index,can form a comprehensive evaluation system for the pathogenicity of root-knot nematodes;3) multiple resistance evaluation of pepper identified seven varieties,LTCP2、LSP8、LSP5、LSP3、CP1、CP6 and LSP6,as highly resistant (HR),with low disease index (0-20.00) and root galling index (0-1.00).Among them,CP1,CP6,and LSP6 exhibited significantly stronger resistance than the resistant control PM687 (disease index 29.41,root galling index 1.47).

References:

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Last Update: 2026-06-04