Genetic diversity and population structure of Ascochyta rabiei from the western Iranian Ilam and Kermanshah provinces using MAT and SSR markers
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- 作者：Khoshnood Nourollahi (1)
Mohammad Javannikkhah (1)
Mohammad Reza Naghavi (2)
Judith Lichtenzveig (3)
Sayed Mahmmod Okhovat (1)
Richard P. Oliver (3)
Simon R. Ellwood (3) - 关键词：Ascochyta blight ; Ascochyta rabiei ; Genetic diversity ; Gene flow
- 刊名：Mycological Progress
- 出版年：2011
- 出版时间：March 2011
- 年：2011
- 卷：10
- 期：1
- 页码：1-7
- 全文大小：184KB
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Mohammad Javannikkhah (1)
Mohammad Reza Naghavi (2)
Judith Lichtenzveig (3)
Sayed Mahmmod Okhovat (1)
Richard P. Oliver (3)
Simon R. Ellwood (3)
1. Agricultural College, University of Ilam, Ilam, Iran
2. Agronomy and Plant Breeding Department, Agricultural College, University of Tehran, Karaj, Iran
3. Australian Centre for Necrotrophic Fungal Pathogens, Health Sciences, Murdoch University, Perth, WA, 6150, Australia
文摘
Knowledge of genetic diversity in A. rabiei provides different levels of information that are important in the management of crop germplasm resources. Gene flow on a regional level indicates a significant potential risk for the regional spread of novel alleles that might contribute to fungicide resistance or the breakdown of resistance genes. Simple sequence repeat (SSR) and mating type (MAT) markers were used to determine the genetic structure, and estimate genetic diversity and the prevalence of mating types in 103 Ascochyta rabiei isolates from seven counties in the Ilam and Kermanshah provinces of western Iran (Ilam, Aseman abad, Holaylan, Chardavol, Dareh shahr, Gilangharb, and Sarpul). A set of 3 microsatellite primer pairs revealed a total of 75 alleles; the number of alleles varied from 15 to 34 for each marker. A high level of genetic variability was observed among A. rabiei isolates in the region. Genetic diversity was high (He--.788) within populations with corresponding high average gene flow and low genetic distances between populations. The smallest genetic distance was observed between isolates from Ilam and Chardavol. Both mating types were present in all populations, with the majority of the isolates belonging to Mat1-1 (64%), but within populations the proportions of each mating type were not significantly different from 50%. Results from this study will be useful in breeding for Ascochyta blight-resistant cultivars and developing necessary control measures.