Population structure of Stemphylium lycopersici associated with leaf spot of tomato in a single field

Karima Al-Amri, Abdullah M. Al-Sadi*, Adel Al-Shihi, Abbas Nasehi, Issa Al-Mahmooli, Mike L. Deadman

*المؤلف المقابل لهذا العمل

نتاج البحث: المساهمة في مجلةArticleمراجعة النظراء

7 اقتباسات (Scopus)


Stemphylium lycopersici is an important pathogen causing leaf spot of tomatoes worldwide. Although much information is available about the pathogen, little is known about dynamics of S. lycopersici in tomato fields. Seventy-nine symptomatic leaf samples were collected from two tomato cultivars grown in a farm (Miral and Inbred line). Fungal species associated with the disease were isolated on potato dextrose agar. Seventy-nine isolates were obtained and identified as S. lycopersici based on sequence analysis of combined dataset of the internal transcribed spacer and glyceraldehyde-3-phosphate dehydrogenase regions. The 79 isolates were subjected to amplified fragment length polymorphism analysis using three primer combinations. The Stemphylium lycopersici population from the two cultivars was found to have a very low level of genetic diversity (H = 0.0948). Cluster analysis showed intermixing of isolates from the two cultivars. In addition, analysis of molecular variance showed the presence of a very low level of genetic differentiation between populations obtained from the two cultivars (Fst = 0.0206). These findings indicate the presence of a high rate of gene flow between the two populations and may suggest that the two populations originated from the same inoculum source. The implications of these findings on the management of Stemphylium-induced leaf spot of tomatoes are discussed.

اللغة الأصليةEnglish
رقم المقال1642
مستوى الصوت5
رقم الإصدار1
المعرِّفات الرقمية للأشياء
حالة النشرPublished - ديسمبر 1 2016

ASJC Scopus subject areas

  • ???subjectarea.asjc.1000???


أدرس بدقة موضوعات البحث “Population structure of Stemphylium lycopersici associated with leaf spot of tomato in a single field'. فهما يشكلان معًا بصمة فريدة.

قم بذكر هذا