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Updated: Jul 21, 2025

Genome-wide Analysis of Histone Modifications Distribution using the Chromatin Immunoprecipitation Sequencing Method in Magnaporthe oryzae

Genome-wide Analysis of Histone Modifications Distribution using the Chromatin Immunoprecipitation Sequencing Method in Magnaporthe oryzae

Published on: June 2, 2021

在湖南省 Magnaporthe oryzae 种群的遗传变异

Zhirong Peng¹, Yuefeng Fu², Fan Wang¹

¹State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha 410125, China.

Journal of fungi (Basel, Switzerland)

|July 28, 2023

概括

湖南Magnaporthe oryzae的真菌种群的多样性下降,但从2016-2018年增加了病原性. 这种转变影响了爆病控制和耐药性育种策略.

科学领域:

植物病理学植物病理学
农业科学农业科学
遗传学遗传学是一个

背景情况:

由Magnaporthe oryzae引起的爆病对全球粮食安全构成重大威胁.
了解M. oryzae的种群结构和变异对于有效的疾病管理至关重要.
之前的研究强调了真菌种群的动态性质及其适应控制措施的情况.

研究的目的:

分析湖南省Magnaporthe oryzae孤立种群的种群结构和变异趋势.
评估M. oryzae的致病性和大米抗性 (R) 基因的有效性.
为该地区的抗米育种和爆病控制策略提供见解.

主要方法:

分析了2016年和2018年从湖南省收集的462个M. oryzae分离体.
使用已建立的分类系统 (ZA,ZB,ZC等) 来识别真菌品种. ) 的情况.
使用24个具有主要R基因和Rep-PCR分析的单一基因线 (MLs) 进行致病性评估.

主要成果:

从2016年到2018年,M. oryzae真菌种族度增加,而多样性减少.
占主导地位的ZB群体从2016年的66.2%增加到2018年的72.54%;一些种群 (ZD,ZE,ZF) 消失了.
2018年,R基因的耐药性频率显著下降,大多数有效率低于50%,表明真菌病原性增加.

结论:

近年来,尽管湖南的真菌数量减少,但M. oryzae的病原性显著增加.
这项研究强调了M. oryzae种群的适应性进化,挑战了现有的抵抗策略.
这些发现对于指导未来的抗米育种计划和优化湖南大米爆发病管理至关重要.

关键词:

马格纳波特花 (Magnaporthe oryzae) 是一个很大的植物.病原性病原性病原性人口结构人口结构.这是一场比赛,比赛.电阻的频率是电阻.

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相关概念视频

What is Population Genetics?

What is Population Genetics?

A population is composed of members of the same species that simultaneously live and interact in the same area. When individuals in a population breed, they pass down their genes to their offspring. Many of these genes are polymorphic, meaning that they occur in multiple variants. Such variations of a gene are referred to as alleles. The collective set of all the alleles within a population is known as the gene pool.

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).

Genetic Variation

Genetic Variation

Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
Genes exist in different versions called alleles,...

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.

Hardy-Weinberg Principle

Hardy-Weinberg Principle

Diploid organisms have two alleles of each gene, one from each parent, in their somatic cells. Therefore, each individual contributes two alleles to the gene pool of the population. The gene pool of a population is the sum of every allele of all genes within that population and has some degree of variation. Genetic variation is typically expressed as a relative frequency, which is the percentage of the total population that has a given allele, genotype or phenotype.