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The Migration, Diversity, and Evolution of Puccinia triticina in China
- Source :
- Plants, Vol 13, Iss 17, p 2438 (2024)
- Publication Year :
- 2024
- Publisher :
- MDPI AG, 2024.
-
Abstract
- Wheat leaf rust, caused by Puccinia triticina, is one of the most common fungal diseases of wheat in China and occurs widely in various wheat-growing regions. To clarify the epidemic, spread rules, and population structure of P. triticina among different regions, 217 isolates of P. triticina collected from Hebei, Shandong, Sichuan, and Xinjiang in China were tested by 34 Thatcher near-isogenic lines and 21 pairs of EST-SSR primers. A total of 83 races were identified, and THTT, PHTT, THTS, and PHJT were the most predominant races in the four provinces in 2009. We found enriched virulence and genetic diversity in the four P. triticina populations and a significant correlation between genetic polymorphism and geographic regions. However, no significant correlation was found between virulence phenotypes and molecular genotypes. Moreover, a notable high level of gene flow (Nm = 2.82 > 1) among four P. triticina populations was detected. The genetic relationship among Hebei, Shandong, and Sichuan populations was close, possibly due to the spread of P. triticina from Sichuan to Shandong and then to Hebei. In contrast, the Xinjiang population was relatively independent. Genetic differentiation analysis showed some level of differentiation among or within populations of P. triticina in the four provinces, and the genetic variation within populations (74.97%) was higher than across populations (25.03%). Our study provides a basis for a better understanding of the regional migration, epidemic, and population structure of P. triticina in China.
- Subjects :
- Puccinia triticina
virulence
EST-SSR
genetic diversity
spread
Botany
QK1-989
Subjects
Details
- Language :
- English
- ISSN :
- 22237747
- Volume :
- 13
- Issue :
- 17
- Database :
- Directory of Open Access Journals
- Journal :
- Plants
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.18d9ac178ed04dbe82b6e03ee927033d
- Document Type :
- article
- Full Text :
- https://doi.org/10.3390/plants13172438