相关实验视频

Updated: Jun 28, 2025

Visualizing Early Infection Sites of Rice Blast Disease Magnaporthe oryzae on Barley Hordeum vulgare Using a Basic Microscope and a Smartphone

Visualizing Early Infection Sites of Rice Blast Disease Magnaporthe oryzae on Barley Hordeum vulgare Using a Basic Microscope and a Smartphone

Published on: March 17, 2023

全球传播,遗传差异化和大麦斑点的选择形成网块隔离物

Kealan Hassett¹, Mariano Jordi Muria-Gonzalez¹, Anke Martin²

¹Centre for Crop and Disease Management, School of Molecular and Life Sciences, Curtin University, Bentley, WA 6102, Australia.

|April 15, 2024

概括

对大麦网斑 (Pyrenophora teres f. maculata) 的遗传分析揭示了世界各地不同的种群. 土耳其和加拿大分离物种最多样化,而澳大利亚和南非种群显示出密切的关系,表明复杂的分散和真菌杀菌剂耐药性的进化.

科学领域:

* 植物病理学植物病理学
* 人口遗传学
* 分子生物学 * 分子生物学

背景情况:

* 斑点形式的网斑,由 *Pyrenophora teres* f. *maculata* 引起,是全球重要的大麦疾病.
*了解这种病原体的遗传多样性和传播对于疾病管理至关重要.

研究的目的:

* 分析346个Pyrenophora teres* f. *maculata* 分离物的遗传多样性,生存和分散.
*研究不同地理区域的真菌杀菌剂不敏感性突变 (*Cyp51A*) 的演变.

主要方法:

*对346个病原体分离物的全基因组DArTseq数据分析.
*对遗传关系,种群结构和混合物的分析.
*鉴定Cyp51A*基因突变及其与真菌杀菌剂耐药性的关联.

主要成果:

*观察到显著的遗传差异化,土耳其分离物是最明显的.
*加拿大分离结果显示出第二高的分歧;澳大利亚和南非分离结果最密切相关.
*多个独立的*Cyp51A*突变导致真菌杀菌剂不敏感性,在不同地区被发现,对特定的促进物插入有很强的选择.

结论:

* *Pyrenophora teres* f. *maculata* 在全球范围内表现出复杂的种群结构和分散模式.
* 有证据表明,西澳大利亚和南非分离物之间最近有共同起源.
*该病原体表现出杀剂耐药性的快速演变,这对疾病控制构成了挑战.

关键词:

这种植物叫Hordeum vulgare.多样性阵列技术阵列技术阵列抗真菌剂耐药性抗真菌剂耐药性软选择性扫描软选择性扫描

更多相关视频

Isolation of Culturable Yeasts and Molds from Soils to Investigate Fungal Population Structure

Isolation of Culturable Yeasts and Molds from Soils to Investigate Fungal Population Structure

Published on: May 27, 2022

A Contrast of Three Inoculation Techniques used to Determine the Race of Unknown Fusarium oxysporum f.sp. niveum Isolates

A Contrast of Three Inoculation Techniques used to Determine the Race of Unknown Fusarium oxysporum f.sp. niveum Isolates

Published on: October 28, 2021

相关概念视频

Mutation, Gene Flow, and Genetic Drift

Mutation, Gene Flow, and Genetic Drift

In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).

Genetics of Speciation

Genetics of Speciation

Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.

Gene Flow

Gene Flow

Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.

Frequency-dependent Selection

Frequency-dependent Selection

When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.