相关实验视频

Updated: Jun 5, 2025

Induction and Evaluation of Inbreeding Crosses Using the Ant, Vollenhovia Emeryi

Induction and Evaluation of Inbreeding Crosses Using the Ant, Vollenhovia Emeryi

Published on: October 5, 2018

在Cronartium pini的异性和自性形式之间的种群结构和结合的差异表明,在自性形式中存在自性

Ke Zhang¹, Berit Samils¹

¹Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences, Sweden.

|December 6, 2024

概括

苏格兰松花泡生的原因Cronartium pini在瑞典表现出明显的异性 (性) 和自性 (克隆) 种群. 了解它们的遗传多样性对于管理森林疾病风险至关重要.

科学领域:

森林病理学森林病理学
人口遗传学人口遗传学
菌类学菌类学是指菌类学.

背景情况:

克罗纳蒂乌斯松 (Cronartium pini) 导致苏格兰松树泡生,对瑞典松树林构成重大威胁.
这种真菌存在于异种性 (宏环性,感染松树和替代宿主) 和自生性 (仅松树) 形式.
了解分布和多样性对于有效的疾病管理策略至关重要.

研究的目的:

分析瑞典Cronartium pini的种群多样性和遗传结构.
为了区分生真菌的异质性和自身性形式.
为苏格兰松树林的战略疾病管理提供信息.

主要方法:

基于C. pini基因组的高分辨率微卫星标记物的开发.
建立用于遗传分析的多重放大系统.
对来自瑞典的396种C. pini单独体的遗传多样性和种群结构的分析.

主要成果:

异种和自身种群在多样性,链接不平衡和遗传结构方面表现出显著的差异.
异种分离物体表现出独特的多部位基因型,表明性繁殖.
自生性分离物经常共享共同的基因型,特别是在瑞典北部,这表明克隆繁殖和可能来自自我受精的起源.

结论:

瑞典的异种C. pini种群是性化的,而自身种群是克隆的.
自生性C. pini可能起源于自我受精,导致同卵性但又多样化的基因型.
这些发现为疾病管理提供了对C. pini种群动态的关键见解.

关键词:

主机交替的交替方式人口遗传学人口遗传学防真菌是什么防真菌是什么性繁殖性繁殖的性繁殖.

更多相关视频

A Highly Scalable Approach to Perform Ecological Surveys of Selfing Caenorhabditis Nematodes

A Highly Scalable Approach to Perform Ecological Surveys of Selfing Caenorhabditis Nematodes

Published on: March 1, 2022

Determination of Self- and Inter-incompatibility Relationships in Apricot Combining Hand-Pollination, Microscopy and Genetic Analyses

Determination of Self- and Inter-incompatibility Relationships in Apricot Combining Hand-Pollination, Microscopy and Genetic Analyses

Published on: June 16, 2020

相关概念视频

What is a Species?

What is a Species?

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.

Formation of Species

Formation of Species

Speciation describes the formation of one or more new species from one or sometimes multiple original species. The resulting species are discrete from the parent species, and barriers to reproduction will typically exist. There are two primary mechanisms, speciation with and without geographic isolation—allopatric and sympatric speciation, respectively.

The Ratio of X Chromosome to Autosomes

The Ratio of X Chromosome to Autosomes

In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female...

Crossing Over

Crossing Over

Unlike mitosis, meiosis aims for genetic diversity in its creation of haploid gametes. Dividing germ cells first begin this process in prophase I, where each chromosome—replicated in S phase—is now composed of two sister chromatids (identical copies) joined centrally.
The homologous pairs of sister chromosomes—one from the maternal and one from the paternal genome—then begin to align alongside each other lengthwise, matching corresponding DNA positions in a process...

Asexual Reproduction

Asexual Reproduction

Asexual reproduction allows plants to reproduce without growing flowers, attracting pollinators, or dispersing seeds. Offspring are genetically identical to the parent and produced without the fusion of male and female gametes.