The assessment of sugar beet genotypes for resistance to Heterodera schachtii nematode under greenhouse conditions and the presence of MN3 molecular marker

Document Type : Research Article

Authors

1 Department of Plant Protection, Science and Research Branch, Islamic Azad University, Tehran, Iran

2 Sugar Beet Seed Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran

Abstract

Heterodera schachtii, the sugar beet cyst nematode (BCN), is a limiting factor in most of the beet-growing 
regions of Iran. Considering this disease's importance and spread, generating resistant cultivars is one of the 
most important methods to reduce its damage. Achieving accurate and fast resistance assessment methods 
facilitates the development of resistant cultivars. This research aims to compare the response of twenty 
domestic and foreign sugar beet genotypes to BCN under greenhouse conditions and with the presence of the 
MN3 molecular marker, which is linked to the BCN resistance gene. Analysis of variance showed a significant 
difference among genotypes for resistance to BCN in greenhouse conditions. Using the MN3 molecular marker 
and greenhouse survey, no susceptible plants were observed in genotype No. F- 21238. Hybrids No. 34781 
and 34791 demonstrated the highest resistance (80 and 78% of plants were resistant) under greenhouse 
conditions and good resistance (80 and 89% of plants were resistant) to this pathogen evaluating the MN3 
marker. The results showed that to save time and more accuracy in selecting resistant genotypes, it is better to 
evaluate genotypes with MN3 molecular marker, and then the chosen genotypes are assessed to determine the 
level of resistance to this pathogen in greenhouse conditions.

Keywords

Iranian Journal of Plant Pathology
Volume 59, Issue 2
July 2024
Pages 115-104

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