红藻种群遗传结构的季节性和年际稳定性。

IF 2.8 3区 生物学 Q1 MARINE & FRESHWATER BIOLOGY
Sarah Shainker-Connelly, Solenn Stoeckel, Morgan L. Vis, Roseanna M. Crowell, Stacy A. Krueger-Hadfield
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引用次数: 0

摘要

时间种群遗传研究研究了进化过程,但很少有生殖系统变异的特征。然而,时间取样可以通过评估自交、异交和克隆的相对比率来提高我们对生殖系统进化的理解。本研究以雌雄同体、单倍体-二倍体淡水红藻Batrachospermum gelatinosum为研究对象。这个物种有一个多年生的,微观的二倍体阶段(chantransia),产生一个短暂的,宏观的单倍体阶段(配子体)。最近的工作集中在单时间点基因分型表明,尽管在不同的位点之间存在差异,但谷种内自交率很高。在此基础上,我们对来自4个生殖系统变异点的191个配子体进行了单快照基因分型。在这项研究中,我们在年内和年内的多个时间点进行了采样。年内数据的结果表明配子体基因型在整个季节发生变化。我们假设,这种模式可能是由于生命周期的季节性和减数分裂的时间在变型中。年际模式的特征是一致的基因型和遗传组成,表明随着时间的推移,主流生殖系统的稳定性。然而,我们的研究确定了可用的理论预测和分析工具可以利用单倍体数据解决生殖系统变异的限制。有必要开发新的分析工具,通过扩大我们在不同生命周期中描述生殖系统时空变化的能力,来理解性的进化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Seasonality and interannual stability in the population genetic structure of Batrachospermum gelatinosum (Rhodophyta)

Seasonality and interannual stability in the population genetic structure of Batrachospermum gelatinosum (Rhodophyta)

Temporal population genetic studies have investigated evolutionary processes, but few have characterized reproductive system variation. Yet, temporal sampling may improve our understanding of reproductive system evolution through the assessment of the relative rates of selfing, outcrossing, and clonality. In this study, we focused on the monoicous, haploid-diploid freshwater red alga Batrachospermum gelatinosum. This species has a perennial, microscopic diploid phase (chantransia) that produces an ephemeral, macroscopic haploid phase (gametophyte). Recent work focusing on single-time point genotyping suggested high rates of intragametophytic selfing, although there was variation among sites. We expand on this work by genotyping 191 gametophytes sampled from four sites that had reproductive system variation based on single-snapshot genotyping. For this study, we sampled at multiple time points within and among years. Results from intra-annual data suggested shifts in gametophytic genotypes throughout the season. We hypothesize that this pattern is likely due to the seasonality of the life cycle and the timing of meiosis among the chantransia. Interannual patterns were characterized by consistent genotypic and genetic composition, indicating stability in the prevailing reproductive system through time. Yet, our study identified limits by which available theoretical predictions and analytical tools can resolve reproductive system variation using haploid data. There is a need to develop new analytical tools to understand the evolution of sex by expanding our ability to characterize the spatiotemporal variation in reproductive systems across diverse life cycles.

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来源期刊
Journal of Phycology
Journal of Phycology 生物-海洋与淡水生物学
CiteScore
6.50
自引率
3.40%
发文量
69
审稿时长
2 months
期刊介绍: The Journal of Phycology was founded in 1965 by the Phycological Society of America. All aspects of basic and applied research on algae are included to provide a common medium for the ecologist, physiologist, cell biologist, molecular biologist, morphologist, oceanographer, taxonomist, geneticist, and biochemist. The Journal also welcomes research that emphasizes algal interactions with other organisms and the roles of algae as components of natural ecosystems. All aspects of basic and applied research on algae are included to provide a common medium for the ecologist, physiologist, cell biologist, molecular biologist, morphologist, oceanographer, acquaculturist, systematist, geneticist, and biochemist. The Journal also welcomes research that emphasizes algal interactions with other organisms and the roles of algae as components of natural ecosystems.
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