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对Arabidopsis杂交障碍物的遗传和环境操纵揭示了内细胞化中的对抗性功能

Katrine N Bjerkan^1,2, Renate M Alling^1,2, Ida V Myking^1,2

¹Section for Genetics and Evolutionary Biology (EVOGENE), Department of Biosciences, University of Oslo, Oslo, Norway.

Frontiers in plant science

|August 21, 2023

概括

杂交种子的发育被内精中的障碍物阻,影响了发芽. 温度和特定的基因,如AGAMOUS-LIKE 35,影响这些生殖隔离机制.

科学领域:

植物生殖生物学植物生殖生物学
规格化机制规格化机制
种子的种子开发.

背景情况:

生殖隔离是物种化的关键.
杂交障碍物可以在内中出现,影响种子的发育.
内精细胞化对于将营养物质转移到胚胎至关重要.

研究的目的:

在阿拉比多普西斯交叉中调查基于内的杂交障碍.
确定遗传和环境因素在杂交种子失败中的作用.
在杂交过程中识别控制内细胞化的基因.

主要方法:

在Arabidopsis thaliana和相关物种 (A. arenosa,A. lyrata) 之间进行互交交叉.
使用内精特异性的记者来监测细胞化时间.
在不同温度条件下评估种子发芽率.
基因分析了AGAMOUS-LIKE 35在杂交内精中的作用.

主要成果:

杂交种子表现出相反的内细胞化表型 (早期与晚期),这取决于花粉捐赠者.
温度梯度显著改变了细胞化表型.
特定的Arabidopsis thaliana加入和AGAMOUS-LIKE 35基因调节的杂交种子生存能力.
内记者的子宫外表达表明受损的源-沉过渡.

结论:

胚芽细胞化是植物物种化中的一个关键的后异位障碍.
遗传 (例如,AGAMOUS-LIKE 35) 和环境 (温度) 因素都控制着杂交不兼容性.
了解这些障碍有助于育种和气候变化适应研究.

关键词:

一个. arenosa arenosa 是一个.一个. lyrataata 的人.阿拉比多普西斯塔利亚纳.精子末端的精子.混合屏障是混合屏障的一个障碍.种子开发种子开发温度的温度的温度的温度的温度.

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