基因表达和花粉表现表明,不同交配系统的Solanum物种之间的交配后选择发生了变化.
Timothy J Biewer-Heisler1, Matthew J S Gibson1, Emily Sornay1
1Department of Biology, Indiana University, Bloomington, Indiana USA.
G3 (Bethesda, Md.)
|May 15, 2025
概括
交配系统的转变会影响交配后的前胚性特征. 与超越Solanum pennellii.i.相比,像Solanum lycopersicum这样的自我物种对花粉管生长的基因表达更窄.
科学领域:
- 植物生殖生物学 植物生殖生物学
- 进化遗传学的进化遗传学
- 性选择性选择性选择
背景情况:
- 后交配前性 (PMPZ) 特性对于交配成功至关重要,特别是在具有竞争性性子体的物种中.
- 了解交配系统的转变如何影响PMPZ特征和特定遗传位置的理解仍然有限.
研究的目的:
- 调查Solanum lycopersicum和超越Solanum pennellii之间的花粉PMPZ特征和基因表达的差异.
- 检查点甲基聚酶 (PME) 和它们的抑制剂 (PMEI) 在花粉管生长中的作用.
主要方法:
- 在S. lycopersicum和S. pennellii.中对特定组织的基因表达 (叶子,花粉,风格) 的比较分析.
- 在体外和体外花粉管生长速度的测量.
- 专注于参与花粉管延长的位置,包括PME和PMEI.
主要成果:
- 对花粉有偏见的基因表达域在自食S. lycopersicum中比在超越S. pennellii.中更窄.
- 大多数生殖性PME和PMEI在S. lycopersicum中显示出受限制的表达域.
- S. pennellii在体内表现出更快的花粉管生长,而S. lycopersicum在体内表现出更快的生长.
结论:
- 在S. lycopersicum种类中,花粉管发育基因的减少表达与体内花粉表现的减缓有关.
- 这表明,在自我性物种中,对神秘的雌性选择进行了放松的选择,从而导致调节花粉管生长的样式机制的分配发生了变化.
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