相关实验视频
Updated: Sep 14, 2025

07:27
A Drosophila Model to Study Wound-induced Polyploidization
Published on: June 9, 2020
5.4K
遗传学模式的损失distyly和多化在primroses中的
Emiliano Mora-Carrera1, Narjes Yousefi1,2, Giacomo Potente1
1Department of Systematic and Evolutionary Botany, University of Zurich, Zurich, Switzerland.
Molecular biology and evolution
|July 23, 2025
概括
植物进化显示出重复的转变,从外交到自交,从双体性到多体性. 这项研究揭示了Primula grandis中CYPT基因的退化,这与失败和交配系统的变化有关.
科学领域:
- 进化生物学是进化的生物学.
- 植物遗传学 植物遗传学
- 基因组学就是基因组学.
背景情况:
- 植物交配系统和化水平往往会一起转移,自我化有助于多化生物的建立.
- 普里穆拉属为研究这些转变提供了一个模型系统,其中包括从双胞胎异形体向多胞胎异形体的转变.
- 由S位点超基因控制的Distyly强制执行外交,而homostyly使自我成为可能.
研究的目的:
- 为了研究多化Primula物种交配系统转移的遗传基础.
- 为了分析S-locus和CYPT基因演变在从distyly到homostyly的跨物种过渡期间.
- 了解与繁殖系统和 ploidy 变化相关的超基因和基因组的宏观进化动态.
主要方法:
- 一种同型多体动物物种 (Primula grandis) 的基因组组.
- 对S位点等位基因和基因进行比较基因组分析.
- 调查CYPT基因退化,包括突变和外因子损失.
主要成果:
- 在P. grandis的同一亚基因组中发现了两个几乎相同的S-locus等位基因,支持混合起源.
- 证据显示,CYPT基因发生了显著的退化,包括突变和外因子损失,与失败的失败一致.
- 在这个进化过渡期间,其他S位点基因基本上没有受到影响.
结论:
- 多倍体Primula的骨发育的宏观进化损失与CYPT基因的大量退化有关.
- 这项研究有助于理解在植物育种系统和化水平发生重大变化期间的超基因和基因组进化.
相关概念视频
Formation of Species
42.5K
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.
42.5K
Polytene Chromosomes
10.2K
Polytene chromosomes are giant interphase chromosomes with several DNA strands placed side by side. They were discovered in the year 1881 by Balbiani in salivary glands, intestine, muscles, malpighian tubules, and hypoderm of larvae Chironomus plumosus. Hence, these are also called "Salivary gland chromosomes." These are found in insects of the order Diptera and Collembola; in certain organs of mammals; and synergids, antipodes of flowering plants. Polytene chromosomes are also...
10.2K
Asexual Reproduction
34.1K
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.
34.1K
Gene Duplication and Divergence
6.3K
The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was generated by gene duplication and divergence, indicating its critical role in evolution.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
6.3K
Hybrid Zones
20.3K
Hybrid zones are narrow regions where two closely related species interact, mate, and produce hybrids. Relative to either parent species, hybrids may possess distinct phenotypic or genetic differences that impact their survival and reproductive success. The genetic variances introduced by hybridization influence species diversity and speciation processes within the hybrid zone.
20.3K
Trihybrid Crosses
23.9K
Trihybrid Crosses
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal...
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal...
23.9K

