在形态上与Elymus caninus (Poaceae: Triticeae) 接近的种群之间发生繁殖关系
E V Shabanova1, A V Agafonov1, O V Dorogina1
1Central Siberian Botanical Garden of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia.
Vavilovskii zhurnal genetiki i selektsii
|March 12, 2024
概括
这项研究表明,Elymus prokudinii,E. viridiglumis和E. goloskokovii集成到Elymus caninus复合体中,形成一个单一的基因库. 它们的高杂交生育率表明它们是E. caninus.的内属类.
科学领域:
- 植物学 植物学
- 遗传学 遗传学 是一个
- 进化生物学 进化生物学
背景情况:
- 杂交学研究对于理解植物生殖关系至关重要.
- 接近Elymus caninus的物种的分类学地位,包括E. prokudinii,E. viridiglumis和E. goloskokovii,需要在E. caninus综合体内进行澄清.
- 研究生殖兼容性和基因流动是确定物种界限的关键.
研究的目的:
- 确定E. goloskokovii,E. prokudinii和E. viridiglumis在E. caninus复合体中的生殖关系和整合水平.
- 分析跨物种杂交物种中关键诊断特征的遗传模式.
- 评估内进的潜力,并澄清研究生物型的分类学地位.
主要方法:
- 使用来自俄罗斯和哈萨克斯坦的自然父母生物型进行了杂交实验.
- 在各种交叉的F1和F2代中评估了种子的生育能力.
- 分析了lemma特征 (三合体, awn长度) 的遗传.
- 用形态和合唱学数据来评估物种状况.
主要成果:
- 在自然父母生物型中观察到高种子生育率 (60-90%).
- 来自密切相关息地的杂交物在F1中显示出最高的种子设置.
- 包括E. caninus,E. viridiglumis和E. goloskokovii在内的组合表现出高生育率 (55.6%和46.1%).
- 分别观察到三合体和长度的digenic和monogenic遗传.
- 高杂交生育率和中间F2形式表明潜在的跨物种内进化.
- 根据较低的杂交生育率和其他标准,证实了E. caninus和E. mutabilis是不同的物种.
结论:
- E. goloskokovii,E. prokudinii和E. viridiglumis与E. caninus形成了一个单一的重组基因库,支持它们被归类为内属类 (E. caninus s. l.).
- 这项研究表明,在这些物种同时存在的自然种群中,物种间侵入的可能性很大.
- 尽管存在潜在的基因流动,但E. caninus和E. mutabilis仍被认为是单独的物种,基于不同的生殖和形态特征.
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