梅奥特分离和梅奥特后驱动的Festuca pratensis B染色体

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Use of Time-Lapse Microscopy and Stage-Specific Nuclear Depletion of Proteins to Study Meiosis in S. cerevisiae

Use of Time-Lapse Microscopy and Stage-Specific Nuclear Depletion of Proteins to Study Meiosis in S. cerevisiae

Published on: October 11, 2022

Rahman Ebrahimzadegan¹, Jörg Fuchs², Jianyong Chen²

¹Department of Plant Production and Genetics, Faculty of Agriculture, University of Kurdistan, Sanandaj, 66177-15175, Iran.

Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology

|September 2, 2023

概括

在Festuca pratensis中的B染色体表现出染色体驱动,偏离孟德尔遗传. 这种驱动主要发生在第一个花粉转化过程中,导致B染色体积累.

科学领域:

遗传学是一个遗传学.
植物生物学植物生物学
细胞遗传学细胞遗传学

背景情况:

B染色体是许多物种中发现的超数染色体.
它们的传播往往偏离孟德尔定律,这种现象被称为染色体驱动.
了解B染色体的行为对于进化和繁殖研究至关重要.

研究的目的:

为了研究Festuca pratensis中B染色体的介质和线粒行为.
量化B染色体在微粒生成过程中的染色体驱动.
确定发生非门德尔分离的阶段.

主要方法:

光在现场杂交 (FISH) 来追踪B染色体分离.
分析微胞生成阶段 ( meiois 和 mitosis).
流细胞计量测量量含有B染色体的精子核.

主要成果:

Festuca pratensis的B染色体在大多数情况下会像标准的A染色体一样在半变化过程中分离.
导致B染色体积累的非门德尔分离在某些情况下会在化过程中发生.
在第一个花粉突变期间观察到显著的B染色体驱动 (≥82%),偏向向生成核的迁移.
在第二次花粉转化过程中,B染色体的分裂是相同的.
鱼类和流细胞测量数据显示一致.

结论:

在Festuca pratensis中B染色体积累的主要机制是在第一个花粉转化过程中的驱动.
虽然部分驱动发生在半分裂过程中,但它不如线粒驱动那么明显.
这项研究提供了对这种物种B染色体驱动的细胞遗传基础的详细见解.

关键词:

在B染色体中,B染色体是在CENH3中,染色体驱动机制的机制介质变化 (meiosis) 是一种变质的过程.没有分离,没有分离.花粉线粒分裂是花粉线粒分裂.

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