通过重复群体选择和反向交叉 (ReMaSSing) 进行QTL映射,繁殖和调试Saccharomyces cerevisiae菌株
Lucas Souza de Bem1,2, Joneclei Alves Barreto1,3, Diego Trindade de Souza4
1Institute for Research in Bioenergy, São Paulo State University, Rio Claro, 13500-230, Brazil.
Biotechnology for biofuels and bioproducts
|February 12, 2026
概括
我们开发了 Reiterated Mass Selection and backcrossing (ReMaSSing) 技术,以提高酵母对纤维素化物 (LCHs) 的耐受性. 这种方法有效地识别了适应性等位基因,增强了用于生物燃料生产的酵母发酵能力.
科学领域:
- 生物技术是生物技术.
- 酵母遗传学 酵母遗传学
- 代谢工程是代谢工程.
背景情况:
- 酵母发酵抑制剂阻碍了从红纤维素化物 (LCHs) 的第二代乙醇生产.
- 定量特征位置 (QTL) 映射对于识别提高LCH耐受性的酵母等位基因至关重要.
- 目前的QTL映射方法是劳动密集型的,需要广泛的选和繁殖.
研究的目的:
- 开发QTL映射的高效方法,以确定Saccharomyces cerevisiae中LCH耐受性的适应性等位基因.
- 提高酵母菌株的发酵能力,用于工业生物燃料生产.
主要方法:
- 开发了重复性质量选择和反向交叉 (ReMaSSing) 用于QTL映射和菌株改进.
- 应用于 ReMaSSing 酵母种群,其来源于交叉耐压和实验室菌株.
- 使用全基因组测序和散装分离分析进行QTL识别.
- 进行了基因交换和竞争试验,以验证已识别的QTL.
主要成果:
- ReMaSSing成功地确定了与LCH耐受性相关的关键QTL,包括影响生长和线粒体功能的等位基因.
- 与父母菌株相比,精选的酵母菌株在LCH耐受性和生长方面表现出超过20%的改善.
- 通过清除有害变异,ReMaSSing促进了实验室菌株背景的"调试".
- 开发了改进的酵母菌株,具有增强的LCH耐受性和西洛斯发酵能力.
结论:
- ReMaSSing为QTL映射和生成改进的酵母菌株提供了一个实用和高效的协议.
- 来自ReMaSSing的重组酵母种群表现出优越的LCH耐受性和生长.
- ReMaSSing是一个强大的工具,用于设计工业酵母菌株,并整合了生物燃料生产所需的特征.
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